WO2017008302A1 - 混频杂散消除方法及接收机 - Google Patents

混频杂散消除方法及接收机 Download PDF

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Publication number
WO2017008302A1
WO2017008302A1 PCT/CN2015/084223 CN2015084223W WO2017008302A1 WO 2017008302 A1 WO2017008302 A1 WO 2017008302A1 CN 2015084223 W CN2015084223 W CN 2015084223W WO 2017008302 A1 WO2017008302 A1 WO 2017008302A1
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Prior art keywords
signal
mixing
self
amplitude
frequency
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PCT/CN2015/084223
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English (en)
French (fr)
Inventor
帅松林
陈静涛
谷卫东
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华为技术有限公司
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Priority to PCT/CN2015/084223 priority Critical patent/WO2017008302A1/zh
Publication of WO2017008302A1 publication Critical patent/WO2017008302A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
    • H04B15/04—Reducing interference from electric apparatus by means located at or near the interfering apparatus the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder
    • H04B15/06—Reducing interference from electric apparatus by means located at or near the interfering apparatus the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder by local oscillators of receivers

Definitions

  • Embodiments of the present invention relate to communication technologies, and in particular, to a method and a receiver for canceling a spurious spur.
  • Radio frequency signal transmission through multiple frequency bands can make the spectrum of the radio frequency signal received by the receiver wider. Therefore, the analog-to-digital converter (ADC) in the receiver performs sampling during analog-to-digital conversion. The rate is larger.
  • ADC analog-to-digital converter
  • a multi-tone signal composed of signals of different frequencies may be used as a plurality of local oscillator signals before the analog-to-digital conversion, and the plurality of local oscillator signals are passed through
  • the radio frequency signals of the plurality of frequency bands are mixed to reduce the frequency of the radio frequency signals of the plurality of frequency bands, thereby reducing the total spectral width of the radio frequency signals of the plurality of frequency bands.
  • the receiver can input a plurality of local oscillation signals f(t) and radio frequency signals x(t) of a plurality of frequency bands to the mixer.
  • the mixer mixes the radio frequency signals x(t) of the plurality of frequency bands according to the plurality of local oscillation signals f(t) to obtain a signal y 1 (t).
  • the mixer mixes the radio frequency signals x(t) of the plurality of frequency bands according to the plurality of local oscillation signals f(t)
  • the plurality of local oscillation signals f(t) are mutually mixed. Generate a self-mixing signal.
  • the signal y 1 (t) includes both a useful signal and a self-mixing signal.
  • the self-mixing signal is a spurious signal with respect to the useful signal, and thus the spurious signal (ie, the self-mixing signal) generated by the mixing needs to be eliminated to avoid the self-mixing signal from the useful signal.
  • Interference in particular, a filter may be provided on the channel of the mixed signal, that is, the back end of the mixer, to filter out the self-mixing signal outside the band of the useful signal, thereby obtaining a signal y 2 (t ).
  • the signal output y 2 (t) of the filter further includes a self-mixing signal in the frequency band of the useful signal, the useful signal
  • the self-mixing signal in the frequency band makes the output signal noise of the receiver relatively low.
  • Embodiments of the present invention provide a mixing spur elimination method and a receiver to improve an output signal to noise ratio received by a receiver.
  • an embodiment of the present invention provides a method for canceling a spurious spur, including:
  • the frequency and amplitude of the cancellation signal being the same as the frequency and amplitude of the first self-mixing signal, respectively, the phase of the cancellation signal being the same as the phase of the first self-mixing signal or
  • the first self-mixing signal comprises a mixing signal generated by mixing a plurality of local oscillator signals with each other;
  • the cancellation signal the first self-mixing signal in the first signal to obtain a second signal;
  • the first signal is, the plurality of local oscillator signals are used to perform radio frequency signals of multiple frequency bands.
  • the mixed signal is, the plurality of local oscillator signals are used to perform radio frequency signals of multiple frequency bands.
  • the generating the cancellation signal comprises:
  • the generating the third signal includes:
  • the generating the third signal includes:
  • the method further includes:
  • the method further includes:
  • a third self-mixing signal in the second signal is to the first self according to the cancellation signal
  • the signal after the mixing signal is processed.
  • the amplitude of the third self-mixing signal is greater than a preset amplitude, determining the second phase adjustment amount and the second amplitude adjustment amount according to the third self-mixing signal amplitude.
  • an embodiment of the present invention provides a method for eliminating a mixed spur, including:
  • Adjusting a plurality of local oscillator signals; the vector sum of the same frequency signals in the self-mixing signals generated by mixing the adjusted plurality of local oscillator signals is a preset value; and the preset value includes zero;
  • the vector sum of the co-frequency signals in the self-mixing signal is the preset value within a preset signal bandwidth
  • the method further includes:
  • the self-mixing signal outside the preset signal bandwidth of the mixed signal is filtered by a filter.
  • the adjusting the multiple local oscillator signals includes:
  • the method further includes:
  • the determining, according to the mixed signal, determining another phase adjustment amount corresponding to the at least one local oscillator signal and/or The other group amplitude adjustment amounts corresponding to the at least one local oscillator signal include:
  • the determining, according to the mixed signal, determining another phase adjustment amount corresponding to the at least one local oscillator signal and/or The other amplitude adjustment amounts corresponding to the at least one local oscillator signal include:
  • the signal-to-noise ratio of the mixed signal is less than a preset signal-to-noise ratio value, determining, according to a signal-to-noise ratio of the mixed signal, other phase adjustment amounts corresponding to the at least one local oscillator signal and the at least Another amplitude adjustment amount corresponding to a local oscillator signal.
  • an embodiment of the present invention further provides a receiver, including:
  • Generating a module configured to generate a cancellation signal, wherein the frequency and amplitude of the cancellation signal are the same as the frequency and amplitude of the first self-mixing signal, respectively, the phase of the cancellation signal and the first self-mixing
  • the phase of the signal is the same or opposite; wherein the first self-mixing signal includes a mixing signal generated by mixing a plurality of local oscillator signals with each other;
  • a processing module configured to process, according to the cancellation signal, the first self-mixing signal in the first signal to obtain a second signal;
  • the first signal is a plurality of the plurality of local oscillator signals
  • the frequency band's RF signal is mixed.
  • the generating module is specifically configured to: generate a third signal, a frequency of the third signal and the first self-mixing signal The same frequency;
  • the receiver further includes:
  • an adjustment module configured to adjust a phase and a magnitude of the third signal according to the preset first phase adjustment amount and the first amplitude adjustment amount, to obtain the cancellation signal.
  • the receiver further includes:
  • a first determining module configured to determine a frequency of the first self-mixing signal according to a frequency of the plurality of local oscillator signals
  • the generating module is further configured to generate the third signal according to a frequency of the first self-mixing signal.
  • the receiver further includes:
  • a second determining module configured to determine a frequency of the first self-mixing signal according to a frequency of the plurality of local oscillator signals; determining the first according to a frequency of the first self-mixing signal and the first signal Three signals.
  • the receiver further includes:
  • a mixing module configured to adjust, according to the first phase adjustment amount and the first amplitude adjustment amount, a phase and a magnitude of the third signal to obtain the cancellation signal, Mixing the plurality of local oscillator signals to obtain a second self-mixing signal;
  • the receiver further includes:
  • a third determining module configured to determine the first phase adjustment amount according to a phase of the second self-mixing signal, and determine the first amplitude adjustment amount according to the amplitude of the self-mixing signal.
  • the receiver further includes:
  • a fourth determining module configured to determine a second phase adjustment amount and a second amplitude adjustment amount according to the second signal
  • the adjustment module is further configured to adjust a phase and a magnitude of the cancellation signal according to the second phase adjustment amount and the second amplitude adjustment amount;
  • the processing module is further configured to process, according to the adjusted cancellation signal, a third self-mixing signal in the second signal; the third self-mixing signal is according to the pair A signal that is processed by the signal to the first self-mixing signal.
  • the receiver further includes:
  • a first detecting module configured to perform amplitude detection on the second signal to obtain a third self-mixing signal amplitude
  • the fourth determining module is further configured to determine, according to the third self-mixing signal amplitude, the second phase adjustment amount and the first if the third self-mixing signal amplitude is greater than a preset amplitude Two amplitude adjustments.
  • the receiver further includes:
  • a second detecting module configured to perform signal to noise ratio detection on the second signal to obtain a signal to noise ratio of the second signal
  • the fourth determining module is further configured to: if the signal to noise ratio of the second signal is less than a preset signal to noise ratio value, determine the second phase adjustment amount and the first according to a signal to noise ratio of the second signal Two amplitude adjustments.
  • an embodiment of the present invention further provides a receiver, including:
  • An adjustment module configured to adjust a plurality of local oscillator signals; the adjusted vector sum of the same frequency signals in the self-mixing signals generated by mixing the plurality of local oscillator signals with each other is a preset value; Set the value to include zero;
  • the mixing module is configured to mix the radio frequency signals of the plurality of frequency bands according to the adjusted plurality of local oscillator signals to obtain the mixed signals.
  • the vector sum of the intra-frequency signals in the self-mixing signal is the preset value in a preset signal bandwidth
  • the receiver further includes:
  • a filtering module configured to filter, by using a filter, the self-mixing signal outside the preset signal bandwidth of the mixed signal.
  • the adjusting module is further configured to respond to the at least one local oscillator signal according to the multiple local oscillator signals a preset phase adjustment amount and/or a preset amplitude adjustment amount corresponding to the at least one local oscillation signal, respectively adjusting a phase and/or a magnitude of the at least one local oscillation signal;
  • the receiver further includes:
  • a determining module configured to determine, according to the mixed signal, another phase adjustment amount corresponding to the at least one local oscillation signal and/or another amplitude adjustment amount corresponding to the at least one local oscillation signal;
  • the adjusting module is further configured to respectively perform, according to the other phase adjustment amount corresponding to the at least one local oscillation signal and/or the other amplitude adjustment amount corresponding to the at least one local oscillation signal, respectively, to the at least one local oscillation signal The phase and/or amplitude are adjusted again;
  • the mixing module is further configured to mix the radio frequency signals of the plurality of frequency bands according to the re-adjusted plurality of local oscillator signals.
  • the receiver further includes:
  • a first detecting module configured to perform amplitude detection on the mixed signal to obtain a amplitude of the self-mixing signal in the mixed signal
  • the determining module is further configured to determine, according to the amplitude of the self-mixing signal, other phase adjustment amounts and/or locations corresponding to the at least one local oscillator signal, if the amplitude of the self-mixing signal is greater than a preset amplitude The other amplitude adjustment amount corresponding to the at least one local oscillation signal is described.
  • the receiver further includes:
  • a second detecting module configured to perform signal to noise ratio detection on the mixed signal, and determine a signal to noise ratio of the mixed signal
  • the determining module is further configured to: if the signal to noise ratio of the mixed signal is less than a preset signal to noise ratio value, determine, according to a signal to noise ratio of the mixed signal, the at least one local oscillator signal Other phase adjustment amounts and other amplitude adjustment amounts corresponding to the at least one local oscillation signal.
  • the mixing spur elimination method and the receiver provided by the embodiment of the present invention can generate the same frequency and amplitude by using the same frequency and amplitude as the first self-mixing signal, and the phase and the first self-mixing signal a cancellation signal having the same phase or opposite phase, wherein the first self-mixing signal includes a mixing signal generated by mixing a plurality of local oscillation signals with each other, and according to the cancellation signal, the first self-mixing in the first signal
  • the frequency signal is processed to obtain a second signal, wherein the first signal is a signal obtained by mixing the plurality of local oscillator signals with the radio frequency signals of the plurality of frequency bands, thereby reducing the first signal, that is, the mixed signal
  • the first self-mixing signal reduces interference of the self-mixing signal to the useful signal and improves the output signal-to-noise ratio of the receiver.
  • 1 is a schematic diagram of a method for eliminating a mixed spur
  • FIG. 2 is a schematic diagram of a basic flow of signal processing performed by a receiver in a wireless communication system
  • FIG. 3 is a flowchart of a method for canceling a mixed spur according to Embodiment 1 of the present invention
  • FIG. 4 is a flowchart of generating a cancellation signal in a method for canceling a mixed spur according to Embodiment 2 of the present invention
  • FIG. 5 is a flowchart of generating a signal having the same frequency as a self-mixing signal in a method for canceling a mixed spur according to Embodiment 2 of the present invention
  • FIG. 6 is a flowchart of another method for generating a signal having the same frequency as a self-mixing signal in a method for canceling a mixed spur according to Embodiment 2 of the present invention
  • FIG. 7 is a flowchart of adjusting a cancellation signal in a method for canceling a mixed spur according to Embodiment 2 of the present invention.
  • FIG. 8 is a flowchart of a method for canceling a mixed spur based on an adjusted cancellation signal according to Embodiment 2 of the present invention.
  • FIG. 9 is a flowchart of a method for canceling a mixed spur according to Embodiment 3 of the present invention.
  • FIG. 10 is a flowchart of a method for canceling a mixed spur according to Embodiment 4 of the present invention.
  • FIG. 11 is a schematic diagram of a method for canceling a mixed spur according to Embodiment 4 of the present invention.
  • FIG. 13 is a schematic diagram of another method for canceling a mixed spur according to Embodiment 4 of the present invention.
  • FIG. 15 is a schematic diagram of still another method for canceling a mixed spur according to Embodiment 4 of the present invention.
  • FIG. 16 is a schematic structural diagram of a receiver according to Embodiment 5 of the present invention.
  • FIG. 17 is a schematic structural diagram of a receiver according to Embodiment 6 of the present invention.
  • FIG. 18 is a schematic structural diagram of a receiver according to Embodiment 7 of the present invention.
  • FIG. 19 is a schematic structural diagram of another receiver according to Embodiment 7 of the present invention.
  • FIG. 20 is a schematic structural diagram of a receiver according to Embodiment 8 of the present invention.
  • the solution of various embodiments of the present invention is applicable to a scenario in which a signal is transmitted through multiple frequency bands in a wireless communication system to increase a wireless transmission rate. That is, in the wireless communication system, the transmitter of one device transmits a radio frequency signal to a receiver of another device through a plurality of frequency bands, and the receiver receives the radio frequency signal on the plurality of frequency bands. Then, for the receiver, the received radio frequency signals, that is, the spectral widths of the radio frequency signals on the plurality of frequency bands, may include the sum of the spectral widths of the plurality of frequency bands.
  • the spectral width of the radio frequency signals on the plurality of frequency bands may further include a sum of spectral intervals of adjacent ones of the plurality of discrete frequency bands. Therefore, for the receiver, the spectral width of the received signal is large, and the spectrum has sparse characteristics.
  • the receiver can be a receiver of a user equipment or network device in a wireless communication system that transmits radio frequency signals over multiple frequency bands.
  • the receiver filters the radio frequency signals of the multiple frequency bands received by the antenna through a radio frequency (RF) processor to filter the interference signals in the radio frequency signals of the multiple frequency bands. And mixing, by the mixer, the RF signals of the filtered plurality of frequency bands according to the plurality of local oscillator signals, thereby implementing frequency conversion of the RF signals, and obtaining the mixed signals.
  • the mixed signal may be a signal having a fixed frequency such as an intermediate frequency signal.
  • the receiver also performs analog-to-digital conversion on the converted signal through an ADC, and obtains the mixed frequency after processing the analog-to-digital converted signal. A useful signal in the signal.
  • the mixer mixes the radio frequency signals of the plurality of frequency bands according to the plurality of local oscillator signals
  • the plurality of local oscillator signals are mutually mixed, and a self-mixing signal is generated. Therefore, the mixed signal includes the self-mixing signal and the useful signal.
  • the self-mixing signal is a spurious signal relative to the useful signal, that is, the self-mixing signal is actually one of the spurious signals.
  • various embodiments of the present invention provide a plurality of methods for eliminating the mixed spur to reduce or eliminate The self-mixing signal. That is to say, the method for eliminating the mixed spurs provided by the embodiments of the present invention includes performing optimization processing on the signals before mixing and ADC processing in the mixer of FIG. 2.
  • FIG. 3 is a flowchart of a method for canceling a mixed spur according to Embodiment 1 of the present invention.
  • the method can be performed by a receiver.
  • the receiver in the embodiment of the present invention may be a receiver that processes signals of a plurality of frequency bands.
  • the receiver can be a superheterodyne receiver or a zero intermediate frequency receiver.
  • the method can include:
  • the frequency and amplitude of the cancellation signal are the same as the frequency and amplitude of the first self-mixing signal, and the phase of the cancellation signal is the same as or opposite to the phase of the first self-mixing signal.
  • the first self-mixing signal comprises a mixing signal generated by mixing a plurality of local oscillator signals with each other.
  • the S301 may directly generate a signal having the same frequency as the first self-mixing signal according to the frequency of the first self-mixing signal, or according to the plurality of frequency bands according to the plurality of local oscillator signals.
  • the frequency-mixed signal and the frequency of the first self-mixing signal determine a signal having the same frequency as the first self-mixing signal, and then pass the same frequency as the first self-mixing signal.
  • the phase and amplitude are adjusted to obtain the cancellation signal having the same frequency and amplitude as the frequency and amplitude of the first self-mixing signal, the phase being the same or opposite to the phase of the first self-mixing signal.
  • Each of the plurality of local oscillator signals generates a mixed signal
  • the frequency of the one mixed signal may be a frequency difference between the two local oscillator signals. That is, the first self-mixing signal may include at least one mixed signal, wherein each of the at least one mixed signal is generated by mixing two of the plurality of local oscillator signals The mixing signal, the frequency of each mixing signal is the frequency difference or the approximate frequency difference of the two local oscillator signals.
  • the plurality of local oscillator signals may be signals generated by the local oscillator of the receiver according to the frequency of each local oscillator signal.
  • the frequency of each local oscillator signal may be determined according to a signal frequency of a plurality of frequency bands and a preset frequency.
  • the frequency of the plurality of local oscillator signals may be determined, for example, according to a difference between a frequency of the radio frequency signals of the plurality of frequency bands and the preset frequency.
  • the preset frequency can be after the receiver is mixed
  • the center frequency of the intermediate frequency signal may also be the center frequency of the radio frequency signal of the plurality of frequency bands.
  • the plurality of local oscillator signals may be referred to as a Multi-tone Local Oscillator (Multi-LO) signal.
  • Multi-LO Multi-tone Local Oscillator
  • the preset frequency may be a center frequency of a signal of the plurality of local oscillator signals mixed with the radio frequency signals of the plurality of frequency bands, and the mixed signal may be an intermediate frequency
  • the preset frequency may be the center frequency of the intermediate frequency signal.
  • the receiver can be a zero intermediate frequency receiver, and the preset frequency can be a center frequency of the radio frequency signals of the plurality of frequency bands, the mixed signal can be a frequency center frequency of the radio frequency signals of the plurality of frequency bands.
  • Baseband signal is a superheterodyne receiver.
  • the frequency of the cancellation signal is the same as the frequency of the first self-mixing signal, which means that the frequency of the cancellation signal and the frequency of the first self-mixing signal may be identical or close to the same.
  • the amplitude of the cancellation signal is the same as the amplitude of the first self-mixing signal, meaning that the amplitude of the cancellation signal and the amplitude of the first self-mixing signal may be identical or close to the same .
  • the phase of the cancellation signal is the same as the phase of the first self-mixing signal, which means that the phase of the cancellation signal and the phase of the first self-mixing signal may be exactly the same or the same. .
  • phase of the cancellation signal is opposite to the phase of the first self-mixing signal, meaning that the value of the phase of the cancellation signal is exactly the same as or nearly the same as the phase of the first self-mixing signal.
  • the reversal of the phase of the cancellation signal is completely opposite or nearly opposite to the direction of the phase of the first self-mixing signal.
  • the mixed signal generated by mixing the plurality of local oscillator signals with each other, that is, the first self-mixing signal is determined.
  • the plurality of local oscillator signals include N local oscillator signals
  • the frequency of each local oscillator signal may be an integer multiple of a preset fundamental frequency.
  • the plurality of local oscillator signals can be as shown in formula (1).
  • f(t) is the plurality of local oscillator signals
  • ⁇ is a fundamental frequency
  • the fundamental frequency is any frequency greater than zero.
  • a n is the amplitude of the nth local oscillation signal. Is the phase of the nth local oscillator signal.
  • the first self-mixing signal includes a mixing signal generated by mixing the plurality of local oscillator signals with each other. Each of the plurality of local oscillator signals generates a mixed signal.
  • the self-mixing signal can be expressed by the following formula (2).
  • h(t) is the self-mixing signal
  • ⁇ is the fundamental frequency
  • t is time
  • n 1, 2, L, N
  • a n is the amplitude of the nth local oscillation signal
  • a n+k is the amplitude of the n+k local oscillation signal. Is the phase of the nth local oscillator signal, Is the phase of the nth local oscillator signal.
  • the first self-mixing signal in the first signal is processed according to the cancellation signal to obtain a second signal.
  • the first signal is used by the plurality of local oscillator signals to mix radio frequency signals of multiple frequency bands. After the signal.
  • the first signal is a signal obtained by mixing the plurality of local oscillator signals to the radio frequency signals of the plurality of frequency bands, and then the first signal may include the useful signal and the first self-mixing signal.
  • the useful signal may be a signal sent by other devices received by the receiver to perform subsequent operations.
  • the first self-mixing signal may include a mixing signal generated by mixing the plurality of local oscillator signals with each other.
  • the first self-mixing signal in the first signal is processed according to the cancellation signal to obtain the second signal, and the method may further include:
  • the radio frequency signals of the plurality of frequency bands are mixed according to the plurality of local oscillator signals to obtain the first signal, where the first signal includes a useful signal and the first self-mixing signal.
  • the cancellation signal is used to reduce or eliminate the first self-mixing signal.
  • the first self-mixing signal in the first signal is processed according to the cancellation signal, for example, the first signal and the cancellation signal may be input to the combiner, and the combiner is The first signal and the cancellation signal are processed to reduce or even eliminate the first self-mixing signal in the first signal.
  • the combiner may be a reverse combiner, that is, the combiner may be based on the first signal and the cancellation signal
  • a subtraction process is performed to reduce or eliminate the first self-mixing signal in the first signal.
  • the combiner may be a forward combiner, and the combiner may perform additive processing according to the first signal and the cancellation signal. , thereby reducing or eliminating the first self-mixing signal in the first signal.
  • the method for canceling the mixed spurs according to the first embodiment of the present invention can generate the same frequency and amplitude as the frequency and amplitude of the first self-mixing signal, and the phase is the same as the phase of the first self-mixing signal or An opposite cancellation signal, wherein the self-mixing signal comprises a mixing signal generated by mixing a plurality of local oscillator signals with each other, and processing the first self-mixing signal in the first signal according to the cancellation signal Obtaining a second signal, where the first signal is a signal obtained by mixing the plurality of local oscillator signals to the radio frequency signals of the plurality of frequency bands, thereby reducing the first signal, that is, the first of the mixed signals
  • a self-mixing signal reduces the interference of the self-mixing signal to the useful signal and improves the output signal-to-noise ratio of the receiver.
  • the hybrid spur elimination method of the first embodiment of the present invention whether it is the first self-mixing signal located in the useful signal band or the first self-mixing signal outside the useful signal, as long as the generated
  • the frequency and amplitude of the cancellation signal are respectively the same as the frequency and amplitude of the first self-mixing signal, and the phase of the cancellation signal is the same as the phase of the first self-mixing signal, or vice versa, according to the cancellation signal Processing the first self-mixing signal in the first signal, and then reducing or eliminating the self-mixing signal in the first signal, reducing interference of the first self-mixing signal on the useful signal, and improving the receiver The output signal to noise ratio.
  • the interference of the self-mixing signal to the useful signal can be reduced or eliminated, the nonlinear distortion of the useful signal through the receiver is reduced, the linear demand of the receiver is reduced, and the linearity requirement is reduced.
  • the difficulty of analog to digital conversion and signal demodulation is reduced.
  • Embodiment 2 of the present invention further provides a method for eliminating a mixed spur.
  • FIG. 4 is a flowchart of generating a cancellation signal in a method for canceling a mixed spur according to Embodiment 2 of the present invention. As shown in FIG. 4, the method for canceling the mixing spurs of the second embodiment, the generating the cancellation signal in S301 of the first embodiment may include:
  • the phases of the signals are the same or opposite such that the amplitude of the cancellation signal is the same as the amplitude of the first self-mixing signal.
  • the first phase adjustment amount and the first amplitude adjustment amount may be a positive adjustment amount or a negative adjustment amount. If the first phase adjustment amount is a positive adjustment amount, the cancellation may be performed according to the first phase adjustment amount and the phase of the third signal, and if the first phase adjustment amount is a negative adjustment amount, The phase of the third signal may be subtracted from the first phase adjustment amount to obtain the cancellation signal.
  • the first amplitude adjustment amount is a positive adjustment amount, it may be added according to the first amplitude adjustment amount and the amplitude of the third signal to obtain the cancellation signal; if the first amplitude adjustment amount is The negative adjustment amount may be the amplitude of the third signal minus the first amplitude adjustment amount to obtain the cancellation signal.
  • FIG. 5 is a flowchart of generating a signal having the same frequency as a self-mixing signal in a method for canceling a mixed spur according to Embodiment 2 of the present invention.
  • the method for generating the third signal in the foregoing S401 includes:
  • the frequency of the self-mixing signal may be determined according to a frequency difference of each of the plurality of local oscillator signals.
  • Generating the third signal according to the frequency of the first self-mixing signal which may be generated by a signal generating module, such as a signal generator, according to a frequency of the first self-mixing signal, and having the same frequency as the first self-mixing signal The third signal.
  • an embodiment of the present invention provides another method of generating a signal having the same frequency as the first self-mixing signal.
  • FIG. 6 is a flowchart of another method for generating a signal having the same frequency as a self-mixing signal in the method of canceling the mixed spurs according to the second embodiment of the present invention.
  • the generating the third signal in the foregoing S401 may include:
  • the implementation of the S601 may be similar to the foregoing S501, and details are not described herein again.
  • S602. Determine the third signal according to the frequency of the first self-mixing signal and the first signal.
  • the S602 may be configured to select a signal having the same frequency as the first self-mixing signal from the first signal according to a frequency of the first self-mixing signal, and determine that the first signal is mixed with the first self-mixing signal.
  • the signal having the same frequency of the frequency signal is the third signal.
  • FIG. 7 is a flowchart of adjusting a cancellation signal in a method for canceling a mixed spur according to Embodiment 2 of the present invention.
  • the method adjusts the phase and amplitude of the third signal according to the preset first phase adjustment amount and the first amplitude adjustment amount, and obtains the cancellation signal before obtaining the cancellation signal.
  • the method may further include:
  • the obtained second self-mixing signal in S701 can be obtained by mixing the plurality of local oscillation signals to a mixer, and mixing the plurality of local oscillation signals by the mixer.
  • the first self-mixing signal in the first signal may be that the plurality of local oscillator signals and the radio frequency signals of the plurality of frequency bands are input to a mixer, and the mixer is configured according to the plurality of When the vibration signal mixes the radio frequency signals of the plurality of frequency bands, the plurality of local oscillation signals are mixed with each other to generate a mixed signal. That is to say, the second self-mixing signal obtained by the S701 and the first self-mixing signal of the first signal are respectively generated by the mixer according to the plurality of local oscillation signals through different processes.
  • the mixed signals generated by mixing the plurality of local oscillator signals with each other that is, the self-mixing signals are definite. Therefore, the second self-mixing signal obtained by the S701 may be the same as the first self-mixing signal of the first signal.
  • S702 Determine the first phase adjustment amount according to a phase of the second self-mixing signal, and determine the first amplitude adjustment amount according to the amplitude of the second self-mixing signal.
  • the S702 determines the first phase adjustment amount according to the phase of the second self-mixing signal, which may be the second self.
  • the difference between the phase of the mixed signal and the phase of the third signal is determined as the first phase adjustment amount; if the phase of the cancellation signal is opposite to the phase of the first self-mixing signal, the S702 is based on the second self
  • the phase of the mixed signal determines the first phase adjustment amount, for example, the sum of the phase of the second self-mixing signal and the phase of the third signal may be determined as the first phase adjustment amount.
  • the S702 determines the first amplitude adjustment amount according to the amplitude of the second self-mixing signal, for example, may determine the difference between the amplitude of the second self-mixing signal and the amplitude of the third signal. The amount is adjusted for the first amplitude.
  • the solution of the second embodiment can obtain the second self-mixing signal by mixing the plurality of local oscillator signals, and then obtain the phase adjustment amount and the amplitude adjustment amount, thereby performing the phase and amplitude of the cancellation signal once. Adjusting to reduce the first self-mixing signal in the mixed signal.
  • the second embodiment of the present invention further provides a method for canceling a mixed spur based on the adjusted cancellation signal.
  • FIG. 8 is a flowchart of a method for canceling a mixed spur based on an adjusted cancellation signal according to Embodiment 2 of the present invention. As shown in FIG. 8, the method further includes:
  • determining, in S801, the second phase adjustment amount and the second amplitude adjustment amount according to the second signal may include:
  • the amplitude of the third self-mixing signal is greater than a preset amplitude, determining the second phase adjustment amount and the second amplitude adjustment amount according to the third self-mixing signal amplitude.
  • determining the second phase adjustment amount and the second amplitude adjustment amount according to the third self-mixing signal amplitude may select one from a plurality of phase adjustment amounts according to the third self-mixing signal amplitude
  • the phase adjustment amount different in the first phase adjustment amount is the second phase adjustment amount
  • one of the plurality of amplitude adjustment amounts is different from the first amplitude adjustment amount
  • the second amplitude adjustment is the amount.
  • the preset amplitude may be a minimum amplitude of the plurality of local oscillator signals.
  • determining the second phase adjustment amount and the second amplitude adjustment amount according to the second signal in S801 may include:
  • the signal to noise ratio of the second signal is less than the preset signal to noise ratio value, determining the second phase adjustment amount and the second amplitude adjustment amount according to the signal to noise ratio of the second signal.
  • determining the second phase adjustment amount and the second amplitude adjustment amount according to a signal to noise ratio of the second signal and selecting one of the plurality of phase adjustment amounts according to a signal to noise ratio of the second signal
  • a phase adjustment amount different in a phase adjustment amount is the second phase adjustment amount, and one of the plurality of amplitude adjustment amounts is different from the first amplitude adjustment amount as the second amplitude adjustment amount.
  • the third self-mixing signal is also present in the second signal. . That is to say, according to the cancellation signal, the third self-mixing signal is not eliminated, so the cancellation signal needs to be adjusted again, and the third self-mixing is performed according to the re-adjusted cancellation signal. The frequency signal is processed again.
  • the second signal further includes a third self-mixing signal, that is, the phase and amplitude of the cancellation signal are different from the phase and amplitude of all the signals of the first self-mixing signal
  • the first self-mixing signal is reduced.
  • the phase and amplitude of the cancellation signal are the same as the phase and amplitude of the partial signal of the first self-mixing signal, and therefore, only the cancellation signal can be reduced in the first self-mixing signal according to the cancellation signal.
  • the partial signal is such that the second signal further includes a third self-mixing signal. Therefore, the cancellation signal is further adjusted according to other phase adjustment amounts or amplitude adjustment amounts, and then processed according to the adjusted cancellation signal to reduce all signals in the first self-mixing signal. Or reducing another portion of the first self-mixing signal, such as the third self-mixing signal.
  • the solution of the second embodiment can obtain the cancellation signal by adjusting the phase and amplitude of the third signal by using the preset first phase adjustment amount and the first amplitude adjustment amount, and processing the first signal according to the cancellation signal.
  • the cancellation signal is continuously adjusted, and then the signal processed based on the previous adjusted cancellation signal is processed again, and the reprocessed signal is detected, and the self-mixing signal is processed in the reprocessed signal.
  • the mixing spur elimination method in the second embodiment can also perform real-time cancellation of the self-mixing signal by adjusting the cancellation signal a plurality of times.
  • the method for eliminating the mixed spurs provided in the second embodiment of the present invention can generate a third signal having the same frequency as the self-mixing signal, and determine the phase adjustment amount and the amplitude adjustment amount, and then the phase of the third signal. And adjusting the amplitude to obtain a cancellation signal, such that the cancellation signal and the first self-mixing signal have the same or nearly the same frequency, and the phase of the cancellation signal is the same as the phase of the first self-mixing signal or Conversely, the amplitude of the cancellation signal is the same as the amplitude of the first self-mixing signal, thereby better ensuring cancellation of the self-mixing signal, reducing or eliminating interference of the self-mixing signal on the useful signal, Reduce the nonlinear distortion of the wanted signal through the receiver, reduce the linear demand of the analog link in the receiver, and reduce the difficulty of analog-to-digital conversion and signal demodulation.
  • Embodiment 3 of the present invention further provides a method for eliminating a mixed spur.
  • the method can be performed by a receiver.
  • the receiver in the embodiment of the present invention may be a receiver that processes signals of a plurality of frequency bands.
  • FIG. 9 is a flowchart of a method for canceling a mixed spur according to Embodiment 3 of the present invention. As shown in FIG. 9, the method can include:
  • S901 Adjust a plurality of local oscillator signals; the vector sum of the same-frequency signals in the self-mixing signals generated by mixing the adjusted plurality of local oscillator signals is a preset value, and the preset value includes zero.
  • the preset value includes zero, and may further include a value close to zero or a vector whose absolute value is close to zero, that is, the adjusted same frequency signal is generated by mixing the plurality of local oscillator signals with each other.
  • Vectors can be zero or close to zero or a vector with an absolute value close to zero. It should be understood that the closer the vector sum in the embodiment of the present invention is to zero, the better the effect of the mixed spur elimination is. When the vector sum is zero, the effect of the mixed spur elimination is the best; but in the actual implementation process In it, it is difficult to guarantee that the vector sum is zero, so as long as the actual requirements are met, the vector sum can be non-zero and can be close to zero.
  • the plurality of local oscillator signals may be signals generated by the local oscillator of the receiver according to the frequency of each local oscillator signal.
  • the frequency of each local oscillator signal may be a signal frequency according to multiple frequency bands, and Set the frequency to determine.
  • the frequency of the plurality of local oscillator signals may be determined, for example, according to a difference between a frequency of the radio frequency signals of the plurality of frequency bands and the preset frequency.
  • the preset frequency may be a center frequency of the intermediate frequency signal after the mixer is mixed, or may be a center frequency of the radio frequency signal of the multiple frequency bands.
  • the self-mixing signal includes a mixed signal generated by mixing the adjusted plurality of local oscillator signals, and the self-mixing signal may include a plurality of mixed signals, and the same-frequency signal may be the self-mixing signal. A signal with the same frequency in the signal.
  • the self-mixing signal in the mixed signal is a value having a certain amplitude and/or phase (which may be called a vector), and the vector value may be equal to a preset value in S901.
  • the self-mixing signal is zero in the mixed signal; if the adjustment is performed, The vector sum of the same frequency signal in the self-mixing signal generated by mixing the plurality of local oscillator signals with each other is a vector close to zero or an absolute value close to zero, and the self-mixing signal in the mixed signal is close to zero.
  • the self-mixing signal in the embodiment of the present invention is zero, and may be close to zero; that is, the self-mixing signal may completely disappear or almost completely disappear or the residual self-mixing signal is within an acceptable range.
  • the self-mixing signal in the mixed signal may be completely zero, that is, the self-mixing signal is not included in the mixed signal. If the vector sum of the same frequency signal in the self-mixing signal is close to zero, the same frequency signal in the self-mixing signal generated by mixing the adjusted plurality of local oscillator signals is substantially canceled, so that after the mixing In the signal, the self-mixing signal is close to zero, and the self-mixing signal is not included in the mixed signal, or the self-mixing signal remaining in the mixed signal is within an acceptable range. .
  • the method for canceling the mixed spurs provided in the third embodiment of the present invention by adjusting the plurality of local oscillator signals, the same frequency signal in the self-mixing signal generated by mixing the adjusted plurality of local oscillator signals
  • the vector sum is a preset value, and the preset value includes zero.
  • the received radio frequency signals are mixed, and the mixed signal may be used in the mixed signal.
  • the self-mixing signal is the preset value, avoiding the interference of the self-mixing signal on the useful signal, and improving the output signal-to-noise ratio of the receiver.
  • the adjusted self-mixing signals generated by the plurality of local oscillator signals are mutually generated.
  • the vector sum of the signals of the frequencies is zero or close to zero, such that the signal of one frequency in the self-mixing signal in the mixed signal is zero or nearly zero.
  • the self-mixing signal may include a frequency mixed signal, and then performing the above scheme of FIG. 9 to ensure the same in the mixed signal.
  • the self-mixing signal is completely eliminated or substantially eliminated.
  • the self-mixing signal may include at least two mixed signals, so if the self-mixing signal in the mixed signal is guaranteed to be completely To eliminate or substantially eliminate, it is necessary to repeat the scheme of FIG. 9 at least twice.
  • the plurality of local oscillator signals are four-tone local oscillator signals, that is, the plurality of local oscillator signals may include four local oscillator signals, and the frequencies of the four local oscillator signals are respectively preset basics. An integer multiple of the frequency.
  • the four-tone local oscillator signal can be as shown in equation (3).
  • ⁇ is the fundamental frequency, and the fundamental frequency is any frequency greater than zero.
  • t is time.
  • a 1 is the amplitude of the first local oscillation signal
  • a 2 is the amplitude of the second local oscillation signal
  • a 3 is the amplitude of the third local oscillation signal
  • a 4 is the amplitude of the fourth local oscillation signal. Is the phase of the first local oscillator signal, For the phase of the second local oscillator signal, For the phase of the third local oscillator signal, Is the phase of the fourth local oscillator signal.
  • Each of the two local oscillator signals in the four-tone local oscillator signal can generate a self-mixing signal, that is, versus versus versus versus versus versus Both can generate a mixed signal.
  • the adjusted phase of the first local oscillator signal is If the second local oscillator signal in the four-tone local oscillator signal The amount of phase adjustment can be Then the adjusted phase of the second local oscillator signal is If the third local oscillator signal in the four-tone local oscillator signal The amount of phase adjustment can be Then the adjusted phase of the third local oscillator signal is If the fourth local oscillator signal in the four-tone local oscillator signal The amount of phase adjustment can be Then the adjusted phase of the fourth local oscillator signal is
  • the mixed second local oscillator signal and the adjusted first local oscillator signal may be mixed signals.
  • the adjusted third local oscillator signal and the adjusted second local oscillator signal may be mixed signals.
  • the adjusted fourth local oscillator signal and the adjusted third local oscillator signal may be mixed signals
  • the vector sum of the same frequency signals of the frequency ⁇ is zero in the self-mixing signal generated by mixing the adjusted plurality of local oscillation signals, it may be as shown in the following formula (4).
  • the adjusted second local oscillator signal and the adjusted first local oscillator signal are mixed signals, and the adjusted third signal
  • the mixing signal of the local oscillator signal and the adjusted second local oscillator signal, the adjusted fourth local oscillator signal and the adjusted third local oscillator signal are all of the same frequency signal of frequency ⁇ , And the vector sum of the same frequency signal with the frequency ⁇ is zero, so that the adjusted four local oscillator signals are mixed with each other, and the generated mixed signals with the frequency ⁇ cancel each other, that is, self-cancellation, so that The self-mixing signal of the adjusted four local oscillation signals mixed with each other does not include the mixing signal of the frequency ⁇ .
  • the mixed third local oscillator signal and the adjusted first local oscillator signal may be mixed signals.
  • the adjusted fourth local oscillator signal and the adjusted second local oscillator signal may be mixed signals
  • the vector sum of the same-frequency signals having a frequency of 2 ⁇ is zero, which can be expressed by the following formula (5).
  • the adjusted third local oscillator signal and the adjusted first local oscillator signal are mixed signals
  • the adjusted fourth signal The mixing signal of the local oscillator signal and the adjusted second local oscillator signal are both co-frequency signals with a frequency of 2 ⁇ , and the vector sum of the same-frequency signal with the frequency of 2 ⁇ is zero, so that the adjusted four The local oscillator signals are mixed with each other, and the generated frequency is 2 ⁇ .
  • the plurality of mixed signals cancel each other, so that the self-mixing signals of the adjusted four local oscillator signals are not included in the self-mixing signal of the frequency 2 ⁇ .
  • the adjusted mixed signal of the first local oscillator signal and the adjusted fourth local oscillator signal may be
  • the mixed signal is a mixed signal having a frequency of 3 ⁇ .
  • the vector sum of the mixed signals having a frequency of 3 ⁇ is zero, which can be expressed by the following formula (6).
  • a vector of the mixed signal of the adjusted first local oscillator signal and the adjusted fourth local oscillator signal The sum of zeros may be such that a self-mixing signal that mixes the adjusted four local oscillator signals with each other does not include a mixed signal of frequency 3 ⁇ .
  • the vector sum of the same-frequency signals in the self-mixing signal generated by mixing the adjusted plurality of local oscillator signals is the preset value.
  • the preset signal bandwidth can be the bandwidth of the useful signal. If the vector sum of the same frequency signal in the self-mixing signal generated by mixing the adjusted plurality of local oscillator signals is the preset value, the self-mixing in the preset bandwidth in the mixed signal The same frequency signal in the frequency signal is the preset value.
  • the method also includes:
  • the self-mixing signal outside the preset signal bandwidth in the mixed signal is filtered by a filter.
  • the adjusted vector of the plurality of local oscillator signals may be such that the vector sum of the same-frequency signals in the self-mixing signal is the preset value, that is, according to the adjusted a plurality of local oscillator signals, mixing the radio frequency signals of the plurality of frequency bands, and reducing all self-mixing signals or self-mixing signals in the pre-set signal bandwidth of the mixed signal to the useful signal signal-to-noise
  • the impact is negligible.
  • the self-mixing signal outside the preset signal bandwidth may be filtered by a band pass filter.
  • the same frequency signal can be generated in the self-mixed signal generated by the adjusted plurality of local oscillator signals only within the preset signal bandwidth.
  • the vector sum is a preset value, and the preset value includes zero, so that the self-mixing signal in the preset bandwidth in the mixed signal has a certain amplitude and/or phase (which may be called a vector).
  • the value of this vector can be equal to the preset value in S901.
  • the self-mixing signal in the signal bandwidth is reduced or eliminated by using only the mixing spur elimination method shown in FIG. 9 above, and the self-mixing signal outside the preset signal bandwidth may be a passband Filtering through the filter allows the process of mixing spur elimination to be simpler.
  • Adjusting the plurality of local oscillator signals in the above S901 may include:
  • the phase and/or amplitude of the vibration signal is adjusted and may include:
  • the phase and amplitude of the at least one local oscillator signal are adjusted according to a preset phase amount adjustment amount corresponding to the at least one local oscillator signal and a preset amplitude adjustment amount corresponding to the at least one local oscillation signal.
  • the method further includes:
  • the radio frequency signals of the plurality of frequency bands are mixed according to the plurality of local oscillator signals that are adjusted again.
  • determining, according to the mixed signal, other phase adjustment amounts corresponding to the at least one local oscillation signal and/or other amplitude adjustment amounts corresponding to the at least one local oscillation signal including:
  • phase and/or amplitude of the at least one local oscillator signal are respectively performed according to other phase adjustment amounts corresponding to the at least one local oscillator signal and/or other amplitude adjustment amounts corresponding to the at least one local oscillator signal. Adjust again, including:
  • Amplitude detection is performed on the mixed signal, and the amplitude of the self-mixing signal in the mixed signal is obtained;
  • the amplitude of the self-mixing signal is greater than a preset amplitude, determining, according to the amplitude of the self-mixing signal, other phase adjustments corresponding to the at least one local oscillator signal and/or other amplitude adjustments corresponding to the at least one local oscillator signal the amount.
  • determining, according to the mixed signal, the other phase adjustment amount corresponding to the at least one local oscillation signal and/or the other amplitude adjustment amount corresponding to the at least one local oscillation signal may include:
  • the signal-to-noise ratio of the mixed signal is less than a preset signal-to-noise ratio, determining, according to the signal-to-noise ratio of the mixed signal, other phase adjustments corresponding to the at least one local oscillator signal and the at least one local oscillator signal Corresponding other amplitude adjustments.
  • the method for canceling the mixed spurs in the third embodiment of the present invention may perform the plurality of local oscillation signals by using a preset phase adjustment amount corresponding to the at least one local oscillation signal and/or a preset amplitude adjustment amount corresponding to the at least one local oscillation signal.
  • the frequency signal is self-cancelled, so that the self-mixing signal in the mixed signal can be reduced; and the phase and/or amplitude of the at least one local oscillator signal is adjusted again, and according to the re-adjusted local oscillator signal
  • the RF signal is mixed, and the self-mixing signal in the mixed signal is again reduced until the self-mixing signal in the mixed signal completely disappears or nearly disappears.
  • the mixing spur elimination method in the third embodiment can also perform the adjustment of the local oscillator signal by multiple times, and mix the radio frequency signal according to the multi-adjusted local oscillator signal, and reduce the mixing by real-time.
  • the self-mixing signal is generated in the subsequent signal to realize real-time cancellation of the self-mixing signal in the mixed signal, avoiding interference of the self-mixing signal to the useful signal, and better guaranteeing the useful signal signal.
  • the noise ratio reduces the nonlinear distortion of the wanted signal through the receiver, reduces the linear requirement of the analog link in the receiver, and reduces the difficulty of analog-to-digital conversion and signal demodulation.
  • Embodiment 4 of the present invention further provides a method for eliminating a mixed spur.
  • Figure 10 is a fourth embodiment of the present invention A flow chart of a mixing spur elimination method is provided.
  • FIG. 11 is a schematic diagram of a method for canceling a mixed spur according to Embodiment 4 of the present invention. As shown in FIG. 10, the method can include:
  • the plurality of local oscillator signals may be f(t).
  • the f(t) may be generated by the local oscillator signal generating module according to the frequency of each local oscillator signal.
  • the local oscillator signal generating module can be a local oscillator inside the receiver.
  • the frequency of each local oscillator signal may be determined according to a signal frequency of a plurality of frequency bands and a preset frequency.
  • the frequency of the plurality of local oscillator signals may be determined, for example, according to a difference between a frequency of the radio frequency signals of the plurality of frequency bands and the preset frequency.
  • the preset frequency may be a center frequency of the intermediate frequency signal after the mixer is mixed, or may be a center frequency of the radio frequency signal of the multiple frequency bands.
  • S1002 Determine a frequency of the self-mixing signal according to the frequency of the plurality of local oscillator signals, and generate a signal having the same frequency as the self-mixing signal according to the frequency of the self-mixing signal, where the self-mixing signal includes the plurality of A mixing signal generated by mixing the vibration signals with each other.
  • the cancellation signal can be z 1 (t) in FIG.
  • the z 1 (t) may be that the local oscillator signal generating module shown in the figure determines the frequency of the self-mixing signal according to the frequency of the plurality of local oscillator signals f(t), and is generated according to the frequency of the self-mixing signal. .
  • S1003 Mix, according to the plurality of local oscillator signals, radio frequency signals of the plurality of frequency bands to obtain a first signal, where the first signal includes a self-mixing signal and a useful signal.
  • the radio frequency signals of the plurality of frequency bands may be x(t) as shown in FIG.
  • the plurality of local oscillator signals f(t) and the radio frequency signals x(t) of the plurality of frequency bands may be input to a mixer, and the mixer may be based on the plurality of local oscillator signals f(t).
  • the frequency signal x(t) of the plurality of frequency bands is mixed to obtain a first signal y 1 (t).
  • a useful signal and a self-mixing signal may be included in the first signal y 1 (t).
  • the self-mixing signal in the first signal y 1 (t) includes a mixing signal generated by mixing the plurality of local oscillation signals f(t) with each other.
  • S1004 Adjust a phase and a magnitude of the signal having the same frequency as the self-mixing signal according to a phase adjustment amount and an amplitude adjustment amount to obtain a cancellation signal.
  • the adjustment module can adjust the phase and amplitude of the signal z 1 (t) having the same frequency as the self-mixing signal according to a phase adjustment amount and an amplitude adjustment amount, and obtain a cancellation signal z 2 . (t).
  • S1005. Process the self-mixing signal in the first signal according to the cancellation signal to obtain a second signal.
  • the cancellation signal z 2 (t) and the first signal y 1 (t) may be input to the combiner, and the combiner according to the cancellation signal z 2 (t)
  • the self-mixing signal in the first signal y 1 (t) is processed to obtain a second signal y 2 (t).
  • S1006 Perform amplitude detection on the second signal to obtain a magnitude of the self-mixing signal in the second signal.
  • the detecting module may perform amplitude detection on the second signal y 2 (t) to obtain a magnitude of the self-mixing signal in the second signal.
  • the detecting module may determine the another phase adjustment amount and the another amplitude according to the amplitude of the self-mixing signal in the second signal. Adjusting the amount, and inputting the other phase adjustment amount and the another amplitude adjustment amount to the adjustment module, and the adjustment module is configured to cancel the signal according to the another phase adjustment amount and the another amplitude adjustment amount The phase and amplitude are adjusted.
  • S1008 Process the self-mixing signal in the second signal according to the second cancellation signal.
  • Embodiments of the present invention generate a plurality of local oscillator signals f(t) using the same reference clock as the plurality of local oscillator signals and a self-mixing signal (ie, spurs) required to cancel the mixing of the plurality of local oscillator signals
  • the cancellation signal wherein the cancellation signal and the self-mixing signal are in the same frequency, equal amplitude, and inversion (also in phase, when the cancellation signal is subtracted from the self-mixing signal), and then can pass through the coupler.
  • the power synthesizer feeds the intermediate frequency channel and the mixed signal (that is, the signal obtained by mixing the received signal and the plurality of local oscillator signals) to realize the elimination of the self-mixing signal, and finally obtains the output after canceling the self-mixing signal. signal.
  • the embodiment of the invention can perform cancellation of the self-mixing signal at one time; and can also detect (or adjust) the amplitude and phase of the cancellation signal according to the detection result by detecting the signal output after the cancellation, thereby realizing Real-time cancellation of self-mixing signals.
  • a method for canceling a mixed spur of the fourth embodiment of the present invention can determine a frequency of the self-mixing signal according to a frequency of the plurality of local oscillator signals by generating a plurality of local oscillator signals, and according to the frequency of the self-mixing signal Generating a signal having the same frequency as the self-mixing signal, and adjusting the phase and amplitude of the signal having the same frequency as the self-mixing signal to obtain a cancellation signal such that the frequency of the cancellation signal
  • the frequency of the self-mixing signal is the same
  • the phase of the cancellation signal is the same as or opposite to the phase of the self-mixing signal
  • the amplitude of the cancellation signal is the same as the amplitude of the self-mixing signal, and according to the cancellation
  • the signal processes the self-mixing signal in the mixed signal, thereby reducing the self-mixing signal in the mixed signal, avoiding interference of the self-mixing signal to the useful signal, and improving the output signal of the receiver
  • the noise ratio reduce
  • Embodiment 4 of the present invention further provides another method for eliminating aliasing spurs.
  • FIG. 12 is a flowchart of another method for canceling a spurious spur according to Embodiment 4 of the present invention.
  • FIG. 13 is a schematic diagram of another method for canceling a mixed spur according to Embodiment 4 of the present invention. As shown in FIG. 12, the method can include:
  • S1201 generate a plurality of local oscillator signals.
  • the plurality of local oscillation signals may be f(t).
  • the f(t) may be generated by the local oscillator signal generating module according to the frequency of each local oscillator signal.
  • the local oscillator signal generating module can be, for example, a local oscillator internal to the receiver.
  • the frequency of each local oscillator signal may be determined according to a signal frequency of a plurality of frequency bands and a preset frequency.
  • the frequency of the plurality of local oscillator signals may be determined, for example, according to a difference between a frequency of the radio frequency signals of the plurality of frequency bands and the preset frequency.
  • the preset frequency may be a center frequency of the intermediate frequency signal after the mixer is mixed, or may be a center frequency of the radio frequency signal of the multiple frequency bands.
  • S1202 Mixing radio frequency signals of multiple frequency bands according to the plurality of local oscillator signals to obtain a first signal, where the first signal includes a useful signal and a self-mixing signal.
  • the radio frequency signals of the plurality of frequency bands may be x(t) as shown in FIG.
  • the plurality of local oscillator signals f(t) and the radio frequency signals x(t) of the plurality of frequency bands may be input to a mixer, and the mixer according to the plurality of local oscillator signals f(t
  • the frequency signal x(t) of the plurality of frequency bands is mixed to obtain a first signal y 1 (t).
  • a useful signal and a self-mixing signal may be included in the first signal y 1 (t).
  • the self-mixing signal in the first signal y 1 (t) includes a mixing signal generated by mixing the plurality of local oscillation signals f(t) with each other.
  • S1203. Determine a frequency of the self-mixing signal according to a frequency of the plurality of local oscillator signals, and select a signal having the same frequency as the self-mixing signal from the first signal according to a frequency of the self-mixing signal.
  • the cancellation module may select the cancellation signal having the same frequency as the self-mixing signal from the first signal according to the frequency of the self-mixing signal.
  • the selection module can be a frequency selection component such as a bandpass filter.
  • S1204 Adjust a phase and a magnitude of a signal having the same frequency as the self-mixing signal according to a phase adjustment amount and an amplitude adjustment amount to obtain a cancellation signal.
  • the adjustment module can adjust the phase and amplitude of the signal z 1 (t) having the same frequency as the self-mixing signal according to a phase adjustment amount and an amplitude adjustment amount, and obtain a cancellation signal.
  • z 2 (t) can adjust the phase and amplitude of the signal z 1 (t) having the same frequency as the self-mixing signal according to a phase adjustment amount and an amplitude adjustment amount, and obtain a cancellation signal.
  • S1205. Process the self-mixing signal in the first signal according to the cancellation signal to obtain a second signal.
  • the cancellation signal z 2 (t) and the first signal y 1 (t) may be input to the combiner, and the combiner according to the cancellation signal z 2 (t)
  • the self-mixing signal in the first signal y 1 (t) is processed to obtain a second signal y 2 (t).
  • S1206 Perform amplitude detection on the second signal to obtain a magnitude of the self-mixing signal in the second signal.
  • the detecting module may perform amplitude detection on the second signal y 2 (t) to obtain a magnitude of the self-mixing signal in the second signal.
  • the detecting module may determine the another phase adjustment amount and the another amplitude adjustment amount according to the amplitude of the self-mixing signal in the second signal, and The another phase adjustment amount and the another amplitude adjustment amount are input to the adjustment module, and the adjustment module performs the phase and the amplitude of the cancellation signal according to the another phase adjustment amount and the another amplitude adjustment amount. Adjust again.
  • S1208 Process the self-mixing signal in the second signal according to the adjusted cancellation signal.
  • a cancellation signal required for canceling a self-mixing signal (ie, spurs) generated by mixing a plurality of local oscillator signals may be selected from the mixed signals, wherein the cancellation signal and the self-mixing signal are used.
  • the frequency signal is of the same frequency, equal amplitude, and inversion (may also be in phase, when the cancellation signal is subtracted from the self-mixing signal cancellation), and then the intermediate frequency channel and the mixed signal can be fed through the coupler or the power combiner ( That is, the signal obtained by mixing the received signal and the plurality of local oscillator signals is synthesized to realize the elimination of the self-mixing signal, and finally the output signal after canceling the self-mixing signal is obtained.
  • the embodiment of the invention can perform cancellation of the self-mixing signal at one time; and can also detect (or adjust) the amplitude and phase of the cancellation signal according to the detection result by detecting the signal output after the cancellation, thereby realizing Real-time cancellation of self-mixing signals.
  • the other mixing spur elimination method of the fourth embodiment of the present invention can be adopted according to the self-mixing signal
  • the frequency and the mixed signal determine the same frequency as the self-mixing signal, and adjust the phase and amplitude of the signal having the same frequency as the self-mixing signal to obtain a cancellation signal, so that the pair
  • the frequency of the cancellation signal is the same as the frequency of the self-mixing signal
  • the phase of the cancellation signal is the same as or opposite to the phase of the self-mixing signal
  • the amplitude of the cancellation signal is the same as the amplitude of the self-mixing signal.
  • the output signal-to-noise ratio of the machine reduces the nonlinear distortion of the wanted signal through the receiver, reduces the linear requirement of the analog link in the receiver, and reduces the difficulty of analog-to-digital conversion and signal demodulation.
  • Embodiment 4 of the present invention further provides another method for eliminating alias spurs.
  • FIG. 14 is a flowchart of still another method for canceling a spurious spur according to Embodiment 4 of the present invention.
  • FIG. 15 is a schematic diagram of still another method for canceling a mixed spur according to Embodiment 4 of the present invention. As shown in FIG. 14, the method may include:
  • S1401 generate a plurality of local oscillator signals.
  • the plurality of local oscillation signals may be f(t).
  • the f(t) may be generated by the local oscillator signal generating module according to the frequency of each local oscillator signal.
  • the local oscillator signal generating module can be, for example, a local oscillator internal to the receiver.
  • the frequency of each local oscillator signal may be determined according to a signal frequency of a plurality of frequency bands and a preset frequency.
  • the frequency of the plurality of local oscillator signals may be determined, for example, according to a difference between a frequency of the radio frequency signals of the plurality of frequency bands and the preset frequency.
  • the preset frequency may be a center frequency of the intermediate frequency signal after the mixer is mixed, or may be a center frequency of the radio frequency signal of the multiple frequency bands.
  • the self-mixing signal includes a mixed signal obtained by mixing the adjusted plurality of local oscillator signals with each other.
  • the S1402 may be a phase and amplitude of the at least one local oscillator signal by the adjustment module according to the preset phase adjustment amount corresponding to the at least one local oscillation signal and the preset amplitude adjustment amount corresponding to the at least one local oscillation signal.
  • the adjustment is performed such that the vector sum of the same-frequency signals in the self-mixing signal generated by mixing the adjusted plurality of local oscillation signals f(t) in the preset signal bandwidth is zero.
  • S1403 Mix the radio frequency signals of the plurality of frequency bands according to the adjusted plurality of local oscillator signals to obtain the mixed signals.
  • the self-mixing signal in the mixed signal is a value having a certain amplitude and/or phase (which may be called a vector), and the vector value may be equal to a preset value in S901.
  • the adjusted plurality of local oscillator signals and the radio frequency signals of the plurality of frequency bands are input to a mixer, and the mixer is configured to the plurality of local oscillator signals according to the adjusted plurality of local oscillator signals.
  • the RF signal of the frequency band is mixed to obtain the mixed signal y 1 (t).
  • S1404 performing amplitude detection on the mixed signal to obtain a self-mixing signal amplitude in the mixed signal.
  • the detection module may perform amplitude detection on the mixed signal y 1 (t) to obtain a self-mixing signal amplitude in the mixed signal.
  • the at least one local oscillator If the amplitude of the self-mixing signal is greater than a preset amplitude, according to the other phase adjustment amount corresponding to the at least one local oscillation signal and the other amplitude adjustment amount corresponding to the at least one local oscillation signal, the at least one local oscillator The phase and amplitude of the signal are adjusted again.
  • the detecting module may determine, according to the amplitude of the self-mixing signal, other phase adjustment amounts corresponding to the at least one local oscillator signal and other corresponding to the at least one local oscillator signal.
  • the amplitude adjustment amount is input to the adjustment module by the other phase adjustment amount corresponding to the at least one local oscillation signal and the other amplitude adjustment amount corresponding to the at least one local oscillation signal, and the adjustment module corresponds to the at least one local oscillation signal according to the The other phase adjustment amount and the other amplitude adjustment amount corresponding to the at least one local oscillation signal re-adjust the phase and amplitude of the at least one local oscillation signal.
  • S1406 Mix the radio frequency signals of the plurality of frequency bands again according to the plurality of local oscillator signals that are adjusted again.
  • the filter is used to filter out the signal outside the preset bandwidth in the remixed signal, and the filtered signal may be y 2 (t).
  • the embodiment of the present invention can adjust a plurality of local oscillator signals such that the vector sum of the same-frequency signals in the self-mixing signal (ie, spurs) generated by mixing the adjusted plurality of local oscillator signals is zero, so that During the process of mixing the plurality of local oscillator signals to the radio frequency signals of the plurality of frequency bands, the same-frequency signals in the self-mixing signals are self-cancelled, and then the self-mixing signals in the mixed signals are eliminated. .
  • the self-mixing signal can be cancelled once; or the mixed signal can be detected, and the amplitude and phase of the local oscillator signal can be controlled (or adjusted) in real time according to the detection result. Real-time cancellation of self-mixing signals is achieved.
  • the further mixing spur elimination method of the fourth embodiment of the present invention can be adjusted by the phase and amplitude of the generated plurality of local oscillator signals, so that the plurality of local oscillator signals are mixed with each other in the self-mixing signal.
  • the vector sum of the same frequency signal is zero or close to zero, and then the plurality of frequency band radio frequency signals are mixed according to the adjusted plurality of local oscillator signals, so that the self-mixing signal in the mixed signal is made Zero, avoid interference of the self-mixing signal to the useful signal, improve the output signal-to-noise ratio of the receiver, reduce the linear requirement of the analog link in the receiver, and reduce the difficulty of analog-to-digital conversion and signal demodulation.
  • Embodiment 5 of the present invention further provides a receiver.
  • FIG. 16 is a schematic structural diagram of a receiver according to Embodiment 5 of the present invention. As shown in FIG. 16, the receiver 1600 can include:
  • the generating module 1601 is configured to generate a cancellation signal, wherein the frequency and the amplitude of the cancellation signal are respectively the same as the frequency and amplitude of the first self-mixing signal, and the phase of the cancellation signal and the first self-mixing signal The phase is the same or opposite; wherein the first self-mixing signal comprises a mixing signal generated by mixing a plurality of local oscillator signals with each other;
  • the processing module 1602 is configured to process, according to the cancellation signal, the first self-mixing signal in the first signal to obtain a second signal; the first signal is a radio frequency of the multiple local oscillator signals to multiple frequency bands The signal is mixed after the signal.
  • the generating module 1601 is specifically configured to: generate a third signal, where the frequency of the third signal is the same as the frequency of the first self-mixing signal.
  • Receiver 1600 also includes:
  • an adjustment module configured to adjust a phase and a magnitude of the third signal according to the preset first phase adjustment amount and the first amplitude adjustment amount, to obtain the cancellation signal.
  • the receiver 1600 further includes:
  • a first determining module configured to determine a frequency of the first self-mixing signal according to a frequency of the plurality of local oscillator signals
  • the generating module 1601 is further configured to generate the third signal according to a frequency of the first self-mixing signal.
  • the receiver 1600 further includes:
  • a second determining module configured to determine a frequency of the first self-mixing signal according to a frequency of the plurality of local oscillator signals; and determine the third signal according to a frequency of the first self-mixing signal and the first signal.
  • the receiver 1600 further includes:
  • a mixing module configured to adjust, according to the first phase adjustment amount and the first amplitude, the adjustment module And adjusting the phase and the amplitude of the third signal to obtain the cancellation signal, and mixing the plurality of local oscillation signals to obtain a second self-mixing signal;
  • Receiver 1600 also includes:
  • the third determining module is configured to determine the first phase adjustment amount according to the phase of the second self-mixing signal, and determine the first amplitude adjustment amount according to the amplitude of the self-mixing signal.
  • the receiver 1600 further includes:
  • a fourth determining module configured to determine a second phase adjustment amount and a second amplitude adjustment amount according to the second signal
  • the adjustment module is further configured to adjust a phase and a magnitude of the cancellation signal according to the second phase adjustment amount and the second amplitude adjustment amount;
  • the processing module 1602 is further configured to process, according to the adjusted cancellation signal, the third self-mixing signal in the second signal; the third self-mixing signal is the first signal according to the cancellation signal The signal processed by the self-mixing signal.
  • the receiver 1600 further includes:
  • a first detecting module configured to perform amplitude detection on the second signal, to obtain a third self-mixing signal amplitude
  • the fourth determining module is further configured to determine the second phase adjustment amount and the second amplitude adjustment amount according to the third self-mixing signal amplitude if the third self-mixing signal amplitude is greater than a preset amplitude .
  • the receiver 1600 further includes:
  • a second detecting module configured to perform signal to noise ratio detection on the second signal, to obtain a signal to noise ratio of the second signal
  • the fourth determining module is further configured to: if the signal to noise ratio of the second signal is less than a preset signal to noise ratio value, determine the second phase adjustment amount and the second amplitude adjustment amount according to a signal to noise ratio of the second signal .
  • the receiver provided in the fifth embodiment of the present invention may perform the method of canceling the spurious spurs according to any one of the foregoing embodiments, and the implementation process and the beneficial effects thereof are similar to the foregoing embodiments, and details are not described herein again.
  • Embodiment 6 of the present invention also provides a receiver.
  • FIG. 17 is a schematic structural diagram of a receiver according to Embodiment 6 of the present invention. As shown in FIG. 17, the receiver 1700 can include:
  • the adjusting module 1701 is configured to adjust a plurality of local oscillator signals; the vector sum of the same-frequency signals in the self-mixing signals generated by mixing the adjusted plurality of local oscillator signals is a preset value; the preset value Package Include zero;
  • the mixing module 1702 is configured to mix the radio frequency signals of the plurality of frequency bands according to the adjusted plurality of local oscillator signals to obtain a mixed signal; wherein the self-mixing signal in the mixed signal is The preset value.
  • a vector sum of the same-frequency signal in the self-mixing signal is the preset value; and the self-mixing signal in the preset bandwidth in the mixed signal is the pre-prepared signal Set the value.
  • the receiver 1700 also includes:
  • a filtering module configured to filter, by using a filter, the self-mixing signal outside the preset signal bandwidth in the mixed signal.
  • the adjusting module is further configured to: according to the preset phase adjustment amount corresponding to the at least one local oscillation signal of the plurality of local oscillation signals and/or the preset amplitude adjustment amount corresponding to the at least one local oscillation signal, respectively Adjusting the phase and/or amplitude of the at least one local oscillator signal;
  • the receiver 1700 also includes:
  • a determining module configured to determine, according to the mixed signal, another phase adjustment amount corresponding to the at least one local oscillation signal and/or another amplitude adjustment amount corresponding to the at least one local oscillation signal;
  • the adjustment module is further configured to separately phase and/or amplitude the at least one local oscillator signal according to other phase adjustment amounts corresponding to the at least one local oscillator signal and/or other amplitude adjustment amounts corresponding to the at least one local oscillator signal The value is adjusted again;
  • the mixing module 1702 is further configured to mix the radio frequency signals of the plurality of frequency bands according to the re-adjusted plurality of local oscillator signals.
  • the receiver 1700 further includes:
  • a first detecting module configured to perform amplitude detection on the mixed signal, to obtain a amplitude of the self-mixing signal in the mixed signal
  • the determining module is further configured to determine, according to the amplitude of the self-mixing signal, other phase adjustment amounts corresponding to the at least one local oscillator signal and/or the at least one local oscillator, if the amplitude of the self-mixing signal is greater than a preset amplitude Other amplitude adjustments corresponding to the signal.
  • the receiver 1700 further includes:
  • a second detecting module configured to perform signal to noise ratio detection on the mixed signal, and determine a signal to noise ratio of the mixed signal
  • the determining module is further configured to: if the signal to noise ratio of the mixed signal is less than a preset signal to noise ratio, The other phase adjustment amount corresponding to the at least one local oscillation signal and the other amplitude adjustment amount corresponding to the at least one local oscillation signal are determined according to the signal to noise ratio of the mixed signal.
  • the receiver provided in the sixth embodiment of the present invention can perform the method of canceling the spur spurs according to the third embodiment, and the implementation process and the beneficial effects are similar to those in the foregoing embodiment, and details are not described herein again.
  • Embodiment 7 of the present invention further provides a receiver.
  • FIG. 18 is a schematic structural diagram of a receiver according to Embodiment 7 of the present invention. As shown in FIG. 18, the receiver 1800 can include a generating module 1801, a mixing module 1802, a cancellation module 1803, an adjustment module 1804, and a detection module 1805.
  • the generating module 1801 is connected to the mixing module 1802 and the cancellation module 1803; the cancellation module 1803 is connected to the mixing module 1802 and the adjustment module 1804, and the detection module 1805 is also connected to the cancellation module 1803 and the adjustment module 1804.
  • the generating module 1801 is configured to generate a plurality of local oscillator signals.
  • the mixing module 1802 may be a mixer for mixing the radio frequency signals of the plurality of frequency bands according to the plurality of local oscillator signals to obtain a first signal, where the first signal includes a self-mixing signal and a useful signal.
  • the generating module 1801 is further configured to determine a frequency of the self-mixing signal according to the frequency of the plurality of local oscillator signals, and generate a signal having the same frequency as the self-mixing signal according to the frequency of the self-mixing signal.
  • the self-mixing signal includes a mixing signal generated by mixing the plurality of local oscillator signals with each other.
  • the adjustment module 1804 is further configured to adjust the phase and amplitude of the signal having the same frequency as the self-mixing signal according to a phase adjustment amount and an amplitude adjustment amount to obtain a cancellation signal.
  • the cancellation module 1803 is configured to process the self-mixing signal in the first signal according to the cancellation signal to obtain a second signal.
  • the cancellation module 1803 can be a combiner or a coupler.
  • the detecting module 1805 is configured to perform amplitude detection on the second signal to obtain a magnitude of the self-mixing signal in the second signal.
  • the adjustment module 1804 is further configured to: if the amplitude of the self-mixing signal in the second signal is greater than a preset amplitude, according to another phase adjustment amount and another amplitude adjustment amount, the phase and amplitude of the cancellation signal The value is adjusted to obtain the adjusted cancellation signal.
  • the cancellation module 1803 is further configured to process the self-mixing signal in the second signal according to the second cancellation signal.
  • Embodiment 7 of the present invention also provides another receiver.
  • FIG. 19 is a schematic structural diagram of another receiver according to Embodiment 7 of the present invention.
  • the receiver 1900 can include: a generating module 1901, a mixing module 1902, a selecting module 1903, an adjusting module 1904, a canceling module 1905, and checking Module 1906.
  • the generating module 1901 is connected to the mixing module 1902; the mixing module 1902 is also connected to the selecting module 1903 and the canceling module 1905; the selecting module 1903 is also connected to the adjusting module 1904; the detecting module 1906 is also connected to the canceling module 1905 and the adjusting module 1904. .
  • the cancellation module 1905 can be a combiner or a coupler.
  • the generating module 1901 is configured to generate a plurality of local oscillator signals.
  • the mixing module 1902 is configured to mix the radio frequency signals of the plurality of frequency bands according to the plurality of local oscillator signals to obtain a first signal, where the first signal includes a useful signal and a self-mixing signal.
  • the module 1903 is configured to determine a frequency of the self-mixing signal according to the frequency of the plurality of local oscillator signals, and select a signal having the same frequency as the self-mixing signal from the first signal according to the frequency of the self-mixing signal. .
  • the adjustment module 1904 is configured to adjust the phase and amplitude of the signal having the same frequency as the self-mixing signal according to a phase adjustment amount and an amplitude adjustment amount to obtain a cancellation signal.
  • the cancellation module 1905 is configured to process the self-mixing signal in the first signal according to the cancellation signal to obtain a second signal.
  • the detecting module 1906 is configured to perform amplitude detection on the second signal to obtain a magnitude of the self-mixing signal in the second signal.
  • the adjustment module 1904 is further configured to: if the amplitude of the self-mixing signal in the second signal is greater than a preset amplitude, according to another phase adjustment amount and another amplitude adjustment amount, the phase and the amplitude of the cancellation signal The value is adjusted again to obtain a re-adjusted cancellation signal.
  • the cancellation module 1905 is further configured to process the self-mixing signal in the second signal according to the adjusted cancellation signal.
  • the receiver provided in the seventh embodiment of the present invention can be used to perform the method of removing the mixed spurs in the first embodiment or the second embodiment.
  • the beneficial effects are similar to those in the foregoing embodiment, and are not described herein again.
  • Embodiment 8 of the present invention also provides a receiver.
  • FIG. 20 is a schematic structural diagram of a receiver according to Embodiment 8 of the present invention.
  • the receiver 2000 may include: a generating module 2001, an adjusting module 2002, a mixing module 2003, a detecting module 2004, and a filtering module 2005.
  • the generation module 2001 can be connected to the adjustment module 2002, and the adjustment module 2002 can be connected to the mixing module 2003 and the detection module 2004.
  • the detection module 2004 is also connected to the mixing module 2003.
  • the generating module 2001 can be used to generate a plurality of local oscillator signals.
  • the adjustment module 2002 is configured to: according to the preset phase adjustment amount corresponding to the at least one local oscillation signal of the plurality of local oscillation signals and the preset amplitude adjustment amount corresponding to the at least one local oscillation signal, the at least one local oscillation signal The phase and amplitude are adjusted such that within the predetermined signal bandwidth, the vector sum of the co-frequency signals in the self-mixing signal produced by mixing the adjusted plurality of local oscillator signals with each other is zero.
  • the mixing module 2003 is configured to mix the radio frequency signals of the plurality of frequency bands according to the adjusted plurality of local oscillator signals to obtain the mixed signals.
  • the self-mixing signal in the mixed signal is a value having a certain amplitude and/or phase (which may be called a vector), and the vector value may be equal to a preset value in S901.
  • the detecting module 2004 is configured to perform amplitude detection on the mixed signal to obtain a self-mixing signal amplitude in the mixed signal.
  • the adjustment module 2002 is further configured to: if the amplitude of the self-mixing signal is greater than a preset amplitude, according to other phase adjustment amounts corresponding to the at least one local oscillation signal and other amplitude adjustment amounts corresponding to the at least one local oscillation signal, The phase and amplitude of the at least one local oscillator signal are adjusted again.
  • the mixing module 2003 is further configured to perform frequency mixing on the radio frequency signals of the plurality of frequency bands according to the plurality of local oscillator signals that are adjusted again.
  • the filtering module 2005 is configured to filter the self-mixing signal outside the preset signal bandwidth in the remixed signal.
  • Embodiment 8 of the present invention can be used to perform the method for canceling the mixed spurs in the foregoing Embodiment 3.
  • the beneficial effects are similar to those in the foregoing embodiment, and are not described herein again.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

本发明实施例提供一种混频杂散消除方法及接收机。本发明的混频杂散消除方法包括生成对消信号，对消信号的频率和幅值与自混频信号的频率和幅值相同，对消信号的相位与自混频信号的相位相同或相反；自混频信号包括多个本振信号混频生成的混频信号；根据对消信号对第一信号中的自混频信号进行处理。本发明可提高输出信噪比。

Description

混频杂散消除方法及接收机 技术领域
本发明实施例涉及通信技术，尤其涉及一种混频杂散消除方法及接收机。
背景技术
随着通信技术的不断发展，无线通信***对于传输速率的需求越来越高。为实现高速无线传输，通过多个频带进行射频信号传输的需求越来越普遍。
通过多个频带进行射频信号传输，可使得接收机所接收的射频信号的频谱较宽，因此，接收机中模数转换器(Analog-to-Digital Converter，简称ADC)进行模数转换时的采样率较大。为降低接收机中ADC进行模数转换时的采样率，可在模数转换之前，将多个不同频率的信号组成的多音信号作为多个本振信号，通过该多个本振信号，对该多个频带的射频信号进行混频，降低该多个频带的射频信号的频率，从而降低该多个频带的射频信号的总频谱宽度。图1为一种混频杂散消除方法的示意图。如图1所示，接收机可将多个本振信号f(t)和多个频带的射频信号x(t)，输入至混频器。该混频器根据多个本振信号f(t)对多个频带的射频信号x(t)进行混频得到信号y1(t)。然而，混频器在根据多个本振信号f(t)对该多个频带的射频信号x(t)进行混频时，该多个本振信号f(t)之间存在相互混频，生成自混频信号。因此，该信号y1(t)既包括有用信号，还包括自混频信号。该自混频信号相对于有用信号而言是杂散信号，因而需要将该由于混频而产生的杂散信号(即自混频信号)消除，以避免该自混频信号对该有用信号的干扰，具体的，可以在混频后的信号的通道上，即混频器的后端，设置滤波器来滤除该有用信号的频带外的该自混频信号，从而得到信号y2(t)。
由于该滤波器仅可滤除该有用信号的频带外的自混频信号，使得滤波器输出的信号y2(t)中还包括该有用信号的频带内的自混频信号，该有用信号的频带内的自混频信号，使得接收机的输出信噪比较低。
发明内容
本发明实施例提供一种混频杂散消除方法及接收机，以提高接收机接收的输出信噪比。
第一方面，本发明实施例提供一种混频杂散消除方法，包括：
生成对消信号，所述对消信号的频率和幅值分别与第一自混频信号的频率和幅值相同，所述对消信号的相位与所述第一自混频信号的相位相同或相反；其中，所述第一自混频信号包括多个本振信号相互混频生成的混频信号；
根据所述对消信号，对第一信号中的所述第一自混频信号进行处理，得到第二信号；所述第一信号为所述多个本振信号对多个频带的射频信号进行混频后的信号。
根据第一方面，在第一方面的第一种可能实现的方式中，所述生成对消信号包括：
生成第三信号，所述第三信号的频率与所述第一自混频信号的频率相同；
根据预设的第一相位调节量和第一幅值调节量，对所述第三信号的相位及幅值进行调节，获得所述对消信号。
根据第一方面的第一种可能实现的方式，在第二种可能实现的方式中，所述生成第三信号包括：
根据所述多个本振信号的频率确定所述第一自混频信号的频率；
根据所述第一自混频信号的频率生成所述第三信号。
根据第一方面的第一种可能实现的方式，在第三种可能实现的方式中，所述生成第三信号包括：
根据所述多个本振信号的频率确定所述第一自混频信号的频率；
根据所述第一自混频信号的频率和所述第一信号确定所述第三信号。
根据第一方面的第一种至第三种可能实现的方式中任意一种，在第四种可能实现的方式中，所述根据预设的第一相位调节量和第一幅值调节量，对所述第三信号的相位及幅值进行调节，获得所述对消信号之前，所述方法还包括：
对所述多个本振信号进行混频，得到第二自混频信号；
根据所述第二自混频信号的相位确定所述第一相位调节量，根据所述自混频信号的幅值确定所述第一幅值调节量。
根据第一方面的第一种至第四种可能实现的方式中任意一种，在第五种 可能实现的方式中，所述方法还包括：
根据所述第二信号确定第二相位调节量及第二幅值调节量；
根据所述第二相位调节量和所述第二幅值调节量，对所述对消信号的相位及幅值进行调节；
根据所述调节后的所述对消信号，对所述第二信号中的第三自混频信号进行处理；所述第三自混频信号为根据所述对消信号对所述第一自混频信号进行处理后的信号。
根据第一方面的第五种可能实现的方式，在第六种可能实现的方式中，所述根据所述第二信号确定第二相位调节量及第二幅值调节量包括：
对所述第二信号进行幅值检测，得到所述第三自混频信号幅值；
若所述第三自混频信号幅值大于预设幅值，根据所述第三自混频信号幅值确定所述第二相位调节量和所述第二幅值调节量。
根据第一方面的第五种可能实现的方式，在第七种可能实现的方式中，所述根据所述第二信号确定第二相位调节量及第二幅值调节量包括：
对所述第二信号进行信噪比检测，得到所述第二信号的信噪比；
若所述第二信号的信噪比小于预设信噪比值，根据所述第二信号的信噪比确定所述第二相位调节量和所述第二幅值调节量。
第二方面，本发明实施例提供一种混频杂散消除方法，包括：
对多个本振信号进行调节；所述调节后的所述多个本振信号相互混频生成的自混频信号中同频信号的矢量和为预设值；所述预设值包括零；
根据所述调节后的所述多个本振信号，对多个频带的射频信号进行混频，得到混频后的信号。
根据第二方面，在第二方面的第一种可能实现的方式中，在预设信号带宽内，所述自混频信号中同频信号的矢量和为该预设值；
所述方法还包括：
采用滤波器将所述混频后的信号中所述预设信号带宽外的所述自混频信号进行滤除。
根据第二方面或第二方面的第一种可能实现的方式，在第二种可能实现的方式中，所述对所述多个本振信号进行调节包括：
根据所述多个本振信号中至少一个本振信号对应的预设相位调节量和/ 或所述至少一个本振信号对应的预设幅值调节量，分别对所述至少一个本振信号的相位和/或幅值进行调节；
所述方法还包括：
根据所述混频后的信号确定所述至少一个本振信号对应的其他相位调节量和/或所述至少一个本振信号对应的其他幅度调节量；
根据所述至少一个本振信号对应的其他相位调节量和/或所述至少一个本振信号对应的其他幅值调节量，分别对所述至少一个本振信号的相位和/或幅值进行再次调节；
根据所述再次调节后的所述多个本振信号，对所述多个频带的射频信号进混频。
根据第二方面的第二种可能实现的方式，在第三种可能实现的方式中，所述根据所述混频后的信号确定所述至少一个本振信号对应的其他相位调节量和/或所述至少一个本振信号对应的其他组幅值调节量包括：
对所述混频后的信号进行幅值检测，得到所述混频后的信号中所述自混频信号幅值；
若所述自混频信号幅值大于预设幅值，根据所述自混频信号幅值确定所述至少一个本振信号对应的其他相位调节量和/或所述至少一个本振信号对应的其他幅值调节量。
根据第二方面的第二种可能实现的方式，在第四种可能实现的方式中，所述根据所述混频后的信号确定所述至少一个本振信号对应的其他相位调节量和/或所述至少一个本振信号对应的其他幅值调节量包括：
对所述混频后的信号进行信噪比检测，确定所述混频后的信号的信噪比；
若所述混频后的信号的信噪比小于预设信噪比值，根据所述混频后的信号的信噪比确定所述至少一个本振信号对应的其他相位调节量和所述至少一个本振信号对应的其他幅值调节量。
第三方面，本发明实施例还提供一种接收机，包括：
生成模块，用于生成对消信号，所述对消信号的频率和幅值分别与第一自混频信号的频率和幅值相同，所述对消信号的相位与所述第一自混频信号的相位相同或相反；其中，所述第一自混频信号包括多个本振信号相互混频生成的混频信号；
处理模块，用于根据所述对消信号，对第一信号中的所述第一自混频信号进行处理，得到第二信号；所述第一信号为所述多个本振信号对多个频带的射频信号进行混频后的信号。
根据第三方面，在第三方面的第一种可能实现的方式中，所述生成模块，具体用于：生成第三信号，所述第三信号的频率与所述第一自混频信号的频率相同；
所述接收机还包括：
调节模块，用于根据预设的第一相位调节量和第一幅值调节量，对所述第三信号的相位及幅值进行调节，获得所述对消信号。
根据第三方面的第一种可能实现的方式，在第二种可能实现的方式中，所述接收机还包括：
第一确定模块，用于根据所述多个本振信号的频率确定所述第一自混频信号的频率；
所述生成模块，还用于根据所述第一自混频信号的频率生成所述第三信号。
根据第三方面的第一种可能实现的方式，在第三种可能实现的方式中，所述接收机还包括：
第二确定模块，用于根据所述多个本振信号的频率确定所述第一自混频信号的频率；根据所述第一自混频信号的频率和所述第一信号确定所述第三信号。
根据第三方面的第一种至第三种可能实现的方式中任意一种，在第四种可能实现的方式中，所述接收机还包括：
混频模块，用于在所述调节模块根据所述第一相位调节量和所述第一幅值调节量，对所述第三信号的相位及幅值进行调节获得所述对消信号之前，对所述多个本振信号进行混频，得到第二自混频信号；
所述接收机还包括：
第三确定模块，用于根据所述第二自混频信号的相位确定所述第一相位调节量，根据所述自混频信号的幅值确定所述第一幅值调节量。
根据第三方面的第一种至第四种可能实现的方式，在第五种可能实现的方式中，所述接收机还包括：
第四确定模块，用于根据所述第二信号确定第二相位调节量及第二幅值调节量；
所述调节模块，还用于根据所述第二相位调节量和所述第二幅值调节量，对所述对消信号的相位及幅值进行调节；
所述处理模块，还用于根据所述调节后的所述对消信号，对所述第二信号中的第三自混频信号进行处理；所述第三自混频信号为根据所述对消信号对所述第一自混频信号进行处理后的信号。
根据第三方面的第五种可能实现的方式，在第六种可能实现的方式中，所述接收机还包括：
第一检测模块，用于对所述第二信号进行幅值检测，得到所述第三自混频信号幅值；
所述第四确定模块，还用于若所述第三自混频信号幅值大于预设幅值，根据所述第三自混频信号幅值确定所述第二相位调节量和所述第二幅值调节量。
根据第三方面的第五种可能实现的方式，在第七种可能实现的方式中，所述接收机还包括：
第二检测模块，用于对所述第二信号进行信噪比检测，得到所述第二信号的信噪比；
所述第四确定模块，还用于若所述第二信号的信噪比小于预设信噪比值，根据所述第二信号的信噪比确定所述第二相位调节量和所述第二幅值调节量。
第四方面，本发明实施例还提供一种接收机，包括：
调节模块，用于对多个本振信号进行调节；所述调节后的所述多个本振信号相互混频生成的自混频信号中同频信号的矢量和为预设值；所述预设值包括零；
混频模块，用于根据所述调节后的所述多个本振信号，对多个频带的射频信号进行混频，得到混频后的信号。
根据第四方面，在第四方面的第一种可能实现的方式中，在预设信号带宽内，所述自混频信号中同频信号的矢量和为该预设值；
所述接收机还包括：
滤波模块，用于采用滤波器将所述混频后的信号中所述预设信号带宽外的所述自混频信号进行滤除。
根据第四方面或第四方面的第一种可能实现的方式，在第二种可能实现的方式中，所述调节模块，还用于根据所述多个本振信号中至少一个本振信号对应的预设相位调节量和/或所述至少一个本振信号对应的预设幅值调节量，分别对所述至少一个本振信号的相位和/或幅值进行调节；
所述接收机还包括：
确定模块，用于根据所述混频后的信号确定所述至少一个本振信号对应的其他相位调节量和/或所述至少一个本振信号对应的其他幅度调节量；
所述调节模块，还用于根据所述至少一个本振信号对应的其他相位调节量和/或所述至少一个本振信号对应的其他幅值调节量，分别对所述至少一个本振信号的相位和/或幅值进行再次调节；
所述混频模块，还用于根据所述再次调节后的所述多个本振信号，对所述多个频带的射频信号进混频。
根据第四方面的第二种可能实现的方式，在第三种可能实现的方式中，
所述接收机还包括：
第一检测模块，用于对所述混频后的信号进行幅值检测，得到所述混频后的信号中所述自混频信号幅值；
所述确定模块，还用于若所述自混频信号幅值大于预设幅值，根据所述自混频信号幅值确定所述至少一个本振信号对应的其他相位调节量和/或所述至少一个本振信号对应的其他幅值调节量。
根据第四方面的第二种可能实现的方式，在第四种可能实现的方式中，
所述接收机还包括：
第二检测模块，用于对所述混频后的信号进行信噪比检测，确定所述混频后的信号的信噪比；
所述确定模块，还用于若所述混频后的信号的信噪比小于预设信噪比值，根据所述混频后的信号的信噪比确定所述至少一个本振信号对应的其他相位调节量和所述至少一个本振信号对应的其他幅值调节量。
本发明实施例提供的混频杂散消除方法及接收机，可通过生成频率和幅值与第一自混频信号的频率和幅值分别相同，且相位与该第一自混频信号的 相位相同或相反的对消信号，其中，该第一自混频信号包括多个本振信号相互混频生成的混频信号，并根据该对消信号，对第一信号中的第一自混频信号进行处理得到第二信号，该第一信号为该多个本振信号对多个频带的射频信号进行混频后的信号，因而可减小第一信号即该混频后的信号中的第一自混频信号，减小自混频信号对有用信号的干扰，提高接收机的输出信噪比。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为一种混频杂散消除方法的示意图；
图2为无线通信***中接收机进行信号处理的基本流程示意图；
图3为本发明实施例一提供的混频杂散消除方法的流程图；
图4为本发明实施例二提供的混频杂散消除方法中生成对消信号的流程图；
图5为本发明实施例二提供的混频杂散消除方法中一种生成与自混频信号频率相同的信号的流程图；
图6为本发明实施例二提供的混频杂散消除方法中另一种生成与自混频信号频率相同的信号的流程图；
图7为本发明实施例二提供的混频杂散消除方法中一种调节对消信号的流程图；
图8为本发明实施例二提供的一种基于调节后的对消信号的混频杂散消除方法的流程图；
图9为本发明实施例三提供的混频杂散消除方法的流程图；
图10为本发明实施例四提供的一种混频杂散消除方法的流程图；
图11为本发明实施例四提供的一种混频杂散消除方法的示意图；
图12为本发明实施例四提供的另一种混频杂散消除方法的流程图；
图13为本发明实施例四提供的另一种混频杂散消除方法的示意图；
图14为本发明实施例四提供的又一种混频杂散消除方法的流程图；
图15为本发明实施例四提供的又一种混频杂散消除方法的示意图；
图16为本发明实施例五提供的接收机的结构示意图；
图17为本发明实施例六提供的接收机的结构示意图；
图18为本发明实施例七提供的一种接收机的结构示意图；
图19为本发明实施例七提供的另一种接收机的结构示意图；
图20为本发明实施例八提供的一种接收机的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明各实施例的方案适用于无线通信***中通过多个频带传输信号，以提高无线传输速率的场景。也就是说，在该无线通信***中，一个设备的发射机通过多个频带向另一个设备的接收机发送射频信号，该接收机在该多个频带上接收射频信号。那么，对于该接收机来说，接收的射频信号，即该多个频带上的射频信号的频谱宽度可包括该多个频带的频谱宽度之和。若该多个频带为多个离散的频带，则该多个频带上的射频信号的频谱宽度还可包括多个离散的频带中相邻频带的频谱间隔之和。因此，对于接收机来说，其接收信号的频谱宽度较大，且频谱具有稀疏特性。示例地，该接收机可以为通过多个频带传输射频信号的无线通信***中的用户设备或网络设备的接收机。
图2为无线通信***中接收机进行信号处理的基本流程示意图。如图2所示，接收机通过射频(Radio Frequency，简称RF)处理器对天线接收的多个频带的射频信号进行滤波处理，以对该多个频带的射频信号中的干扰信号进行滤除，并通过混频器根据多个本振信号对该滤波后的多个频带的射频信号进行混频，从而实现射频信号的变频，获得该混频后的信号。该混频后的信号可以为具有固定频率的信号如中频信号。该接收机还通过ADC对该变频后的信号进行模数转换，并通过对模数转换后信号的处理，获取该混频后的 信号中的有用信号。由于混频器根据该多个本振信号对该多个频带的射频信号进行混频时，该多个本振信号之间存在相互混频，会生成自混频信号。因此，该混频后的信号包括该自混频信号和该有用信号。该自混频信号相对于该有用信号而言是杂散信号，也就是说，该自混频信号实际为杂散信号的一种。为避免该混频后的信号中的该自混频信号对有用信号的干扰，提高接收机的输出信噪比，本发明各实施例提供了多种混频杂散消除方法，以减少或消除该自混频信号。也就是说，本发明各实施例提供的混频杂散消除方法包括对该图2中混频器进行混频及ADC处理之前的信号进行优化处理。
图3为本发明实施例一提供的混频杂散消除方法的流程图。该方法可由接收机执行。本发明实施例中的接收机可以为处理多个频带信号的接收机。示例地，该接收机可以为超外差接收机或者零中频接收机。如图3所示，该方法可包括：
S301、生成对消信号，该对消信号的频率和幅值分别与第一自混频信号的频率和幅值相同，该对消信号的相位与该第一自混频信号的相位相同或相反；其中，该第一自混频信号包括多个本振信号相互混频生成的混频信号。
具体地，该S301中可以是根据该第一自混频信号的频率直接生成一个与该第一自混频信号的频率相同的信号，或者，根据根据该多个本振信号对多个频带的射频信号进行混频后的信号和该第一自混频信号的频率确定一个与该第一自混频信号的频率相同的信号，继而通过对与该第一自混频信号的频率相同的信号的相位和幅值进行调节，从而得到频率和幅值与该第一自混频信号的频率和幅值相同，相位与该第一自混频信号的相位相同或相反的该对消信号。该多个本振信号中每两个本振信号均会产生一个混频信号，该一个混频信号的频率可以为该两个本振信号的频率差。也就是说，该第一自混频信号可包括至少一个混频信号，其中，至少一个混频信号中的每个混频信号为多个本振信号中每两个本振信号混频产生的混频信号，每个混频信号的频率为该每两个本振信号的频率差或者近似频率差。
该多个本振信号可以为该接收机的本地振荡器根据各本振信号的频率产生的信号。其中，各本振信号的频率可以是根据多个频带的信号频率，和预设频率确定的。该多个本振信号的频率例如可以是根据该多个频带的射频信号的频率，与该预设频率的差值确定的。该预设频率可以为接收机混频后的 中频信号的中心频率，也可以为该多个频带的射频信号的中心频率。其中，该多个本振信号可称为多音本振(Multi-tone Local Oscillator，简称Multi-LO)信号。
若该接收机为超外差接收机，该预设频率可以为该多个本振信号对多个频带的射频信号进行混频后的信号的中心频率，那么该混频后的信号可以为中频信号，该预设频率可以为该中频信号的中心频率。若该接收机可以为零中频接收机，该预设频率可以为该多个频带的射频信号的中心频率，则该混频后的信号可以为频率为该多个频带的射频信号的中心频率的基带信号。
需要说明的是，该对消信号的频率与第一自混频信号的频率相同，指的是：该对消信号的频率与该第一自混频信号的频率可以完全相同，也可接近相同。该对消信号的幅值与该第一自混频信号的幅值相同，指的是，该对消信号的幅值与该第一自混频信号的幅值可以完全相同，也可接近相同。该对消信号的相位与该第一自混频信号的相位相同，指的是，该对消信号的相位与该第一自混频信号的相位的值和方向可以完全相同，也可接近相同。该对消信号的相位和该第一自混频信号的相位相反，指的是，该对消信号的相位的值与该第一自混频信号的相位的值完全相同或接近相同，该对消信号的相位的反向与该第一自混频信号的相位的方向完全相反或接近相反。
若该多个本振信号是确定的，则该多个本振信号相互混频生成的混频信号，即第一自混频信号便是确定的。举例来说，若该多个本振信号包括N个本振信号，各本振信号的频率可以为预设的基本频率的整数倍。该多个本振信号可如公式(1)所示。
Figure PCTCN2015084223-appb-000001
  公式(1)
公式(1)中f(t)为该多个本振信号，ω为基本频率，该基本频率为大于零的任一频率。t为时间，n＝1,2，L，N，其中，N为该多个本振信号的个数。an为第n本振信号的振幅。
Figure PCTCN2015084223-appb-000002
为第n本振信号的相位。
该第一自混频信号包括该多个本振信号互混频生成的混频信号。该多个本振信号中每两个本振信号均会产生一个混频信号。该自混频信号可为如下公式(2)所示。
Figure PCTCN2015084223-appb-000003
  公式(2)
公式(2)中h(t)为该自混频信号，ω为基波频率，t为时间，n＝1,2，L，N， k＝1,2,L,N-1。其中，N为该多个本振信号的个数。an为第n本振信号的振幅，an+k为第n+k本振信号的振幅。
Figure PCTCN2015084223-appb-000004
为第n本振信号的相位，
Figure PCTCN2015084223-appb-000005
为第n本振信号的相位。
S302、根据该对消信号，对第一信号中的该第一自混频信号进行处理，得到第二信号；该第一信号为该多个本振信号对多个频带的射频信号进行混频后的信号。
具体地，该第一信号为该多个本振信号对多个频带的射频信号进行混频后输出的信号，那么该第一信号中可包括有用信号及该第一自混频信号。该有用信号可以为该接收机接收到的其他设备发送的用于执行后续操作所需的信号。该第一自混频信号可包括该多个本振信号相互混频生成的混频信号。
也就是说，在该S302中根据该对消信号，对第一信号中的该第一自混频信号进行处理，得到第二信号之前，该方法还可包括：
根据该多个本振信号对该多个频带的射频信号进行混频，得到该第一信号，该第一信号包括有用信号及该第一自混频信号。
其中，该对消信号用于减小或消除该第一自混频信号。上述S302中根据该对消信号对该第一信号中的该第一自混频信号进行处理，例如可以是将该第一信号和该对消信号输入至合路器，由该合路器对该第一信号和该对消信号进行处理，从而减小甚至消除该第一信号中的该第一自混频信号。若该对消信号与该第一自混频信号的相位相同，则该合路器可以为反向合路器，也就是说，该合路器可以是根据该第一信号和该对消信号进行相减处理，从而减小或消除该第一信号中的该第一自混频信号。若该对消信号与该第一自混频信号的相位相反，则该合路器可以为正向合路器，该合路器可以是根据该第一信号和该对消信号进行相加处理，从而减小或消除该第一信号中的该第一自混频信号。
本发明实施例一提供的混频杂散消除方法，可通过生成频率和幅值与第一自混频信号的频率和幅值分别相同，且相位与该第一自混频信号的相位相同或相反的对消信号，其中，该自混频信号包括多个本振信号相互混频生成的混频信号，并根据该对消信号，对第一信号中的该第一自混频信号进行处理，得到第二信号，该第一信号为该多个本振信号对多个频带的射频信号进行混频后输出的信号，因而可减小第一信号，也就是混频后的信号中的第一自混频信号，减小自混频信号对有用信号的干扰，提高接收机的输出信噪比。
需要说明的是，对于本发明实施例一的混频杂散消除方法，无论是位于有用信号频带内的第一自混频信号，还是有用信号带外的第一自混频信号，只要生成的该对消信号的频率和幅值分别与第一自混频信号的频率和幅值相同，该对消信号相位与该第一自混频信号的相位相同，或相反，那么根据该对消信号对该第一信号中的第一自混频信号进行处理，继而减小或消除该第一信号中的自混频信号，减小该第一自混频信号对有用信号的干扰，提高接收机的输出信噪比。
同时，由于本发明实施例的混频杂散消除方法，可减小或消除该自混频信号对有用信号的干扰，降低有用信号经过接收机的非线性失真，降低接收机的线性需求，降低模数转换及信号解调的难度。
本发明实施例二还提供一种混频杂散消除方法。图4为本发明实施例二提供的混频杂散消除方法中生成对消信号的流程图。如图4所示，该实施例二的混频杂散消除方法，在上述实施例一的S301中生成对消信号可包括：
S401、生成第三信号，该第三信号的频率与该第一自混频信号的频率相同。
S402、根据预设的第一相位调节量和第一幅值调节量，对所述第三信号的相位及幅值进行调节，获得该对消信号。
根据预设的第一相位调节量和第一幅值调节量，对该第三信号的相位及幅值进行调节，获得该对消信号，使得该对消信号的相位与该第一自混频信号的相位的相同或相反，使得该对消信号的幅值与该第一自混频信号的幅值相同。该第一相位调节量和该第一幅值调节量可以为正调节量，也可以为负调节量。若该第一相位调节量为正调节量，可以是根据该第一相位调节量和该第三信号的相位进行相加，获得该对消信号；若该第一相位调节量为负调节量，可以是该第三信号的相位减去该第一相位调节量，获得该对消信号。若该第一幅值调节量为正调节量，可以是根据该第一幅值调节量和该第三信号的幅值进行相加，获得该对消信号；若该第一幅值调节量为负调节量，可以是该第三信号的幅值减去该第一幅值调节量，获得该对消信号。
图5为本发明实施例二提供的混频杂散消除方法中一种生成与自混频信号频率相同的信号的流程图。如图5所示，该方法在上述S401中生成第三信号包括：
S501、根据该多个本振信号的频率确定该第一自混频信号的频率。
可选的，S501中可以是根据该多个本振信号中每两个本振信号的频率差确定该自混频信号的频率。
S502、根据该第一自混频信号的频率生成该第三信号。
根据该第一自混频信号的频率生成该第三信号，可以是通过信号生成模块，如信号发生器根据该第一自混频信号的频率生成，与该第一自混频信号的频率相同的该第三信号。
可替代地，本发明实施例还提供另一种生成与第一自混频信号频率相同的信号的方法。图6为本发明实施例二提供的混频杂散消除方法中另一种生成与自混频信号频率相同的信号的流程图。如图6所示，在上述实施例一方法中，上述S401中生成第三信号可包括：
S601、根据该多个本振信号的频率确定该第一自混频信号的频率。
该S601的实现方式，可以与上述S501类似，在此不再赘述。
S602、根据该第一自混频信号的频率和该第一信号确定该第三信号。
该S602中可以是根据该第一自混频信号的频率，从该第一信号中选取与该第一自混频信号的频率相同的信号，并确定该第一信号中与该第一自混频信号的频率相同的信号为该第三信号。
图7为本发明实施例二提供的混频杂散消除方法中一种调节对消信号的流程图。如图7所示，该方法在上述实施例二中根据预设的第一相位调节量和第一幅值调节量，对该第三信号的相位及幅值进行调节，获得该对消信号之前，该方法还可包括：
S701、对该多个本振信号进行混频，得到第二自混频信号。
该S701中的得到的第二自混频信号，可以通过将该多个本振信号输入至混频器，由该混频器对该多个本振信号进行混频而得到。如上所述的第一信号中的该第一自混频信号，可以是将该多个本振信号和该多个频带的射频信号均输入至混频器，该混频器根据该多个本振信号对该多个频带的射频信号进行混频时，该多个本振信号相互进行混频而产生的混频信号。也就是说，该S701得到的第二自混频信号，与该第一信号中的第一自混频信号，分别是通过不同过程中，由混频器根据该多个本振信号所生成。若该多个本振信号是确定的，则该多个本振信号相互混频生成的混频信号，即自混频信号便是 确定的。因此，该S701得到的第二自混频信号，与该第一信号中的该第一自混频信号，可以相同。
S702、根据该第二自混频信号的相位确定该第一相位调节量，根据该第二自混频信号的幅值确定该第一幅值调节量。
具体地，若该对消信号的相位与该第一自混频信号的相位相同，则该S702根据该第二自混频信号的相位确定该第一相位调节量，可以是将该第二自混频信号的相位与该第三信号的相位的差值确定为该第一相位调节量；若该对消信号的相位与该第一自混频信号的相位相反，该S702根据该第二自混频信号的相位确定该第一相位调节量，例如可以是将该第二自混频信号的相位与该第三信号的相位的和确定为该第一相位调节量。该S702中根据该第二自混频信号的幅值确定该第一幅值调节量，例如可以是将该第二自混频信号的幅值和该第三信号的幅值的差值，确定为该第一幅值调节量。
该实施例二的方案可通过对该多个本振信号进行混频得到第二自混频信号，继而获得相位调节量和幅值调节量，从而对该对消信号的相位和幅值进行一次调节，以减少该混频后的信号中的第一自混频信号。
可选的，本发明实施例二还提供一种基于调节后的对消信号的混频杂散消除方法。图8为本发明实施例二提供的一种基于调节后的对消信号的混频杂散消除方法的流程图。如图8所示，该方法还包括：
S801、根据该第二信号确定第二相位调节量和第二幅值调节量。
S802、根据该第二相位调节量和该第二幅值调节量，对该对消信号的相位及幅值进行调节。
S803、根据该调节后的该对消信号，对该第二信号中的第三自混频信号进行处理；该第三自混频信号为根据该对消信号对该第一自混频信号进行处理后的信号。
可选的，S801中根据该第二信号确定第二相位调节量和第二幅值调节量可以包括：
对该第二信号进行幅值检测，得到该第二信号中的该第三自混频信号幅值；
若该第三自混频信号幅值大于预设幅值，根据该第三自混频信号幅值确定该第二相位调节量和该第二幅值调节量。
具体地，根据该第三自混频信号幅值确定该第二相位调节量和该第二幅值调节量，可以是根据该第三自混频信号幅值从多个相位调节量选择一个与该第一相位调节量不同的相位调节量为该第二相位调节量，及多个幅值调节量中选择一个与该第一幅值调节量不同的幅值调节量为该第二幅值调节量。其中，该预设幅值可以为该多个本振信号的最小幅值。
可替代地，S801中根据该第二信号确定第二相位调节量和第二幅值调节量可以包括：
对该第二信号进行信噪比检测，得到该第二信号的信噪比；
若该第二信号的信噪比小于预设信噪比值，根据该第二信号的信噪比确定该第二相位调节量和该第二幅值调节量。
具体地，根据该第二信号的信噪比确定该第二相位调节量和该第二幅值调节量，可以是根据该第二信号的信噪比从多个相位调节量选择一个与该第一相位调节量不同的相位调节量为该第二相位调节量，及多个幅值调节量中选择一个与该第一幅值调节量不同的幅值调节量为该第二幅值调节量。
若该第三自混频信号的幅值大于该预设幅值，或者，该第二信号的信噪比小于预设信噪比值，则该第二信号中还存在第三自混频信号。也就是说，根据该对消信号，并没有将该第三自混频信号消除掉，因此还需对该对消信号进行再次调节，并根据再次调节后的对消信号对该第三自混频信号进行再次处理。
由于该第二信号中还包括第三自混频信号，也就是说，该对消信号的相位和幅值，与该第一自混频信号的所有信号的相位和幅值均不同，因而无法减少该第一自混频信号。或者，该对消信号的相位和幅值，与该第一自混频信号的部分信号的相位和幅值相同，因此，根据该对消信号仅可减小该第一自混频信号中的部分信号，使得该第二信号中还包括第三自混频信号。因而，还需根据其他的相位调节量或幅值调节量，对该对消信号进行调节，继而根据调节后的对消信号再次进行处理，以减少该第一自混频信号中的所有信号，或者减少该第一自混频信号中的另一部分信号，如该第三自混频信号。
该实施例二的方案可通过预设的第一相位调节量和第一幅值调节量进行第三信号的相位和幅值的调节得到对消信号，根据该对消信号对第一信号进行处理，得到第二信号，还通过对该第二信号进行检测确定第二相位调节量 和第二幅值调节量对该对消信号进行调节，继而根据该调节后的该对消信号对第二信号进行处理，以减小该第二信号中的第三自混频信号，若根据该调节后对该第二信号进行处理后的信号还不满足条件，如自混频信号幅值大于该预设幅值，或，信号的信噪比小于该预设信噪比值，还需对该对消信号继续进行调节，进而对基于前一次调节后的对消信号进行处理后的信号再次进行处理，并对该再次处理后的信号进行检测，当该再次处理后信号中自混频信号消失，或减小至预设范围内时，即完成对自混频信号的对消。也就是说，该实施例二中的混频杂散消除方法还可通过多次对消信号的调节，进行自混频信号的实时对消。
本发明实施例二提供的各混频杂散消除方法，可通过生成与该自混频信号频率相同的第三信号，并确定相位调节量及幅值调节量，继而对该第三信号的相位及幅值进行调节，得到对消信号，以使得该对消信号与该第一自混频信号的频率相同或接近相同，该对消信号的相位与该第一自混频信号的相位相同或相反，该对消信号的幅值与该第一自混频信号的幅值相同，从而更好地保证对自混频信号的对消，减小或消除自混频信号对有用信号的干扰，降低有用信号经过接收机的非线性失真，降低接收机中模拟链路的线性需求，降低模数转换及信号解调的难度。
本发明实施例三还提供一种混频杂散消除方法。该方法可由接收机执行。本发明实施例中的接收机可以为处理多个频带信号的接收机。图9为本发明实施例三提供的混频杂散消除方法的流程图。如图9所示，该方法可包括：
S901、对多个本振信号进行调节；该调节后的该多个本振信号相互混频生成的自混频信号中同频信号的矢量和为预设值，该预设值包括零。
该预设值包括零，还可包括接近零的值或绝对值接近为零的矢量，也就是说该调节后的该多个本振信号相互混频生成的自混频信号中同频信号的矢量和可以为零，也可接近为零或绝对值接近为零的矢量。应理解，本发明实施例中的矢量和越接近为零，则混频杂散消除的效果越好，当矢量和为零时，混频杂散消除的效果最好；但是在实际实现的过程中，很难保证矢量和为零，所以只要满足实际要求，矢量和可以不为零，也可以接近为零。
该多个本振信号可以是该接收机的本地振荡器根据各本振信号的频率产生的信号。其中，各本振信号的频率可以是根据多个频带的信号频率，和预 设频率确定的。该多个本振信号的频率例如可以是根据该多个频带的射频信号的频率，与该预设频率的差值确定的。该预设频率可以为接收机混频后的中频信号的中心频率，也可以为该多个频带的射频信号的中心频率。
该自混频信号包括该调节后的该多个本振信号相互混频产生的混频信号，那么该自混频信号中可包括多个混频信号，该同频信号可以为该自混频信号中频率相同的信号。
S902、根据该调节后的该多个本振信号，对多个频带的射频信号进行混频，得到混频后的信号。
其中，该混频后的信号中该自混频信号为具有一定幅度和/或相位(可以称为矢量)的值，该矢量值可以等于S901中的预设值。
若该调节后的该多个本振信号相互混频生成的自混频信号中同频信号的矢量和为零，则该混频后的信号中该自混频信号为零；若该调节后的该多个本振信号相互混频生成的自混频信号中同频信号的矢量和接近为零或绝对值接近为零的矢量，则该混频后的信号中该自混频信号接近为零。应理解，本发明实施例中的自混频信号为零，也可以接近为零；即，该自混频信号可以完全消失或几乎完全消失或残留的自混频信号在可以接受的范围内。
若该自混频信号中同频信号的矢量和为零，则该混频后的信号中该自混频信号可以完全为零，即该混频后的信号中完全不包括自混频信号。若该自混频信号中同频信号的矢量和接近为零，则该调节后的该多个本振信号相互混频产生的该自混频信号中同频信号基本抵消，使该混频后的信号中该自混频信号接近为零，则该混频后的信号中几乎完全不包括该自混频信号或者，该混频后的信号中残留的自混频信号在可以接受的范围内。
本发明实施例三提供的混频杂散消除方法，通过对该多个本振信号进行调节，由于该调节后的该多个本振信号相互混频生成的自混频信号中同频信号的矢量和为预设值，该预设值包括零，根据该调节后的该多个本振信号，对多个频带上接收到的射频信号进行混频，可将该混频后的信号中该自混频信号为该预设值，避免该自混频信号对有用信号的干扰，提高接收机的输出信噪比。
需要说明的是，在该实施例三中的该混频杂散消除方法中，每调节一次该对消信号，可使得该调节后的该多个本振信号相互产生的自混频信号中一 个频率的信号的矢量和为零或接近为零，从而使得该混频后的信号中该自混频信号中一个频率的信号为零或接近为零。若该多个本振信号包括两个本振信号，则该自混频信号中可包括一个频率的混频信号，那么执行一次上述图9的方案即可保证该混频后的信号中的该自混频信号完全消除或基本消除。若该多个本振信号包括大于两个的本振信号，则该自混频信号中可包括至少两个混频信号，因此，若保证该混频后的信号中的该自混频信号完全消除或基本消除，则需重复执行至少两次上述图9的方案。
举例来说，若该多个本振信号为四音本振信号，也就是说，该多个本振信号可包括四个本振信号，该四个本振信号的频率分别为预设的基本频率的整数倍。该四音本振信号可如公式(3)所示。
Figure PCTCN2015084223-appb-000006
  公式(3)
公式(3)中ω为基波频率，该基本频率为大于零的任一频率。t为时间。a1为第一本振信号的振幅，a2为第二本振信号的振幅，a3为第三本振信号的振幅，a4为第四本振信号的振幅。
Figure PCTCN2015084223-appb-000007
为第一本振信号的相位，
Figure PCTCN2015084223-appb-000008
为第二本振信号的相位，
Figure PCTCN2015084223-appb-000009
为第三本振信号的相位，
Figure PCTCN2015084223-appb-000010
为第四本振信号的相位。
该四音本振信号中每两个本振信号可生成自混频信号，即
Figure PCTCN2015084223-appb-000011
与
Figure PCTCN2015084223-appb-000012
与
Figure PCTCN2015084223-appb-000013
与
Figure PCTCN2015084223-appb-000014
Figure PCTCN2015084223-appb-000015
与
Figure PCTCN2015084223-appb-000016
与
Figure PCTCN2015084223-appb-000017
与
Figure PCTCN2015084223-appb-000018
均可生成混频信号。
若该四音本振信号中的第一本振信号
Figure PCTCN2015084223-appb-000019
的相位调节量可以为
Figure PCTCN2015084223-appb-000020
那么调节后的该第一本振信号的相位为
Figure PCTCN2015084223-appb-000021
若该四音本振信号中的第二本振信号
Figure PCTCN2015084223-appb-000022
的相位调节量可以为
Figure PCTCN2015084223-appb-000023
那么调节后的该第二本振信号的相位为
Figure PCTCN2015084223-appb-000024
若该四音本振信号中的第三本振信号
Figure PCTCN2015084223-appb-000025
的相位调节量可以为
Figure PCTCN2015084223-appb-000026
那么调节后的该第三本振信号的相位为
Figure PCTCN2015084223-appb-000027
若该四音本振信号中的第四本振信号
Figure PCTCN2015084223-appb-000028
的相位调节量可以为
Figure PCTCN2015084223-appb-000029
那么调节后的该第四本振信号的相位为
Figure PCTCN2015084223-appb-000030
该调节后的该多个本振信号中，该调节后的第二本振信号与该调节后的第一本振信号的混频信号可以为
Figure PCTCN2015084223-appb-000031
该调节后的第三本振信号与该调节后第二本振信号的混频信号可以为
Figure PCTCN2015084223-appb-000032
该调节后的第四本振信号与该调节后第三本振信 号的混频信号可以为
Figure PCTCN2015084223-appb-000033
若该调节后的多个本振信号相互混频产生的自混频信号中，频率为ω的同频信号的矢量和为零，可为如下公式(4)所示。
Figure PCTCN2015084223-appb-000034
  公式(4)
该调节后的多个本振信号相互混频产生的自混频信号中，该调节后的第二本振信号与该调节后的第一本振信号的混频信号、该调节后的第三本振信号与该调节后第二本振信号的混频信号、该调节后的第四本振信号与该调节后第三本振信号的混频信号，均为频率为ω的同频信号，且该频率为ω的同频信号的矢量和为零，可使得该调节后的该四个本振信号相互混频，生成的多个频率为ω的混频信号相互抵消，即自消除，使得对该调节后的该四个本振信号相互混频的自混频信号中不包括频率ω的混频信号。
该调节后的该多个本振信号中，该调节后的第三本振信号与该调节后的第一本振信号的混频信号可以为
Figure PCTCN2015084223-appb-000035
该调节后的第四本振信号与该调节后第二本振信号的混频信号可以为
Figure PCTCN2015084223-appb-000036
若该调节后的多个本振信号相互混频产生的自混频信号中，频率为2ω的同频信号的矢量和为零，可为如下公式(5)所示。
Figure PCTCN2015084223-appb-000037
                             公式(5)
该调节后的多个本振信号相互混频产生的自混频信号中，该调节后的第三本振信号与该调节后的第一本振信号的混频信号、该调节后的第四本振信号与该调节后第二本振信号的混频信号，均为频率为2ω的同频信号，且该频率为2ω的同频信号矢量和为零，可使得该调节后的该四个本振信号相互混频，生成的频率为2ω多个混频信号相互抵消，使得对该调节后的该四个本振信号相互混频的自混频信号中不包括频率2ω的混频信号。
其中，该调节后的该多个本振信号中，该调节后的该第一本振信号与该调节后的第四本振信号的混频信号可以为
Figure PCTCN2015084223-appb-000038
该混频信号为频率为3ω的混频信号。
若该调节后的多个本振信号相互混频产生的自混频信号中，频率为3ω的混频信号的矢量和为零，可为如下公式(6)所示。
Figure PCTCN2015084223-appb-000039
  公式(6)
若该调节后的第一本振信号与该调节后的第四本振信号的混频信号的矢 量和为零，可使得使得对该调节后的该四个本振信号相互混频的自混频信号中不包括频率3ω的混频信号。
可选的，在预设的信号带宽内，该调节后的该多个本振信号相互混频生成的自混频信号中同频信号的矢量和为该预设值。
该预设的信号带宽可以为该有用信号的带宽。若该调节后的该多个本振信号相互混频产生的自混频信号中同频信号的矢量和为该预设值，则该混频后的信号中该预设带宽内的该自混频信号中同频信号为该预设值。
该方法还包括：
采用滤波器将该混频后的信号中该预设信号带宽外的该自混频信号进行滤除。
由于在该预设信号带宽内，该调节后的该多个本振信号，可使得该自混频信号中同频信号的矢量和为该预设值，也就是说，根据该调节后的该多个本振信号，对该多个频带的射频信号进行混频，可减小该混频后的信号中该预设信号带宽内的所有自混频信号或自混频信号对有用信号信噪比影响可忽略。然而，对于该预设信号带宽外的该自混频信号可以是通过带通滤波器进行滤除。
该实施例三提供的另一种混频杂散消除方法中，可仅在该预设信号带宽内，使得该调节后的该多个本振信号相互产生的该自混频信号中同频信号的矢量和为预设值，该预设值包括零，可使得该混频后的信号中该预设带宽内的该自混频信号为为具有一定幅度和/或相位(可以称为矢量)的值，该矢量值可以等于S901中的预设值。
即采用仅通过上述图9所示的混频杂散消除方法，减小或消除该信号带宽内的该自混频信号，而对于该预设信号带宽外的该自混频信号可以是通过带通滤波器进行滤除，从而可使得混频杂散消除的过程更简单。
上述S901中对该多个本振信号进行调节可以包括：
根据该多个本振信号中至少一个本振信号对应的预设相位量调节量和/或该至少一个本振信号对应的预设幅值调节量，分别对该至少一个本振信号的相位和/或幅值进行调节。
具体地，根据该多个本振信号中至少一个本振信号对应的预设相位量调节量和/或该至少一个本振信号对应的预设幅值调节量分别对该至少一个本 振信号的相位和/或幅值进行调节，可以包括：
根据该至少一个本振信号对应的预设相位量调节量对该至少一个本振信号的相位进行调节；或者，
根据该至少一个本振信号对应的预设幅值调节量，对该至少一个本振信号的幅值进行调节；或者，
根据该至少一个本振信号对应的预设相位量调节量和该至少一个本振信号对应的预设幅值调节量，对该至少一个本振信号的相位和幅值进行调节。
可选的，该方法还包括：
根据该混频后的信号确定该至少一个本振信号对应的其他相位调节量和/或该至少一个本振信号对应的其他幅值调节量；
根据该至少一个本振信号对应的其他相位调节量和/或该至少一个本振信号对应的其他幅值调节量，分别对该至少一个本振信号的相位和/或幅值进行再次调节；
根据该再次调节后的该多个本振信号，对该多个频带的射频信号进混频。
具体地，根据该混频后的信号确定该至少一个本振信号对应的其他相位调节量和/或该至少一个本振信号对应的其他幅值调节量，包括：
根据该混频后的信号确定该至少一个本振信号对应的其他相位调节量；或者，
根据该混频后的信号确定该至少一个本振信号对应的其他幅值调节量；或者；
根据该混频后的信号确定该至少一个本振信号对应的其他相位调节量和该至少一个本振信号对应的其他幅值调节量。
可选的，根据该至少一个本振信号对应的其他相位调节量和/或该至少一个本振信号对应的其他幅值调节量，分别对该至少一个本振信号的相位和/或幅值进行再次调节，包括：
根据该至少一个本振信号对应的其他相位调节量，对该至少一个本振信号的相位进行再次调节；或者，
根据该至少一个本振信号对应的其他幅值调节量，对该至少一个本振信号的幅值进行再次调节；或者，
根据该至少一个本振信号对应的其他相位调节量和该至少一个本振信号 对应的其他幅值调节量，对该至少一个本振信号的相位和幅值进行再次调节。
可选的，上述步骤中根据该混频后的信号确定该至少一个本振信号对应的其他相位调节量和/或该至少一个本振信号对应的其他幅值调节量包括：
对该混频后的信号进行幅值检测，得到该混频后的信号中该自混频信号幅值；
若该自混频信号幅值大于预设幅值，根据该自混频信号幅值确定该至少一个本振信号对应的其他相位调节量和/或该至少一个本振信号对应的其他幅值调节量。
可替代地，上述步骤中根据该混频后的信号确定该至少一个本振信号对应的其他相位调节量和/或该至少一个本振信号对应的其他幅值调节量可以包括：
对该混频后的信号进行信噪比检测，确定该混频后的信号的信噪比；
若该混频后的信号的信噪比小于预设信噪比值，根据该混频后的信号的信噪比确定该至少一个本振信号对应的其他相位调节量和该至少一个本振信号对应的其他幅值调节量。
本发明实施例三的混频杂散消除方法，可通过至少一个本振信号对应的预设相位调节量和/或至少一个本振信号对应的预设幅值调节量进行多个本振信号中的至少一个本振信号的相位和/或幅值进行调节，并根据该调节后的多个本振信号，对该多个本振信号的射频信号进行混频，使得自混频信号中的同频信号进行自消除，因此可减少该混频后的信号中的该自混频信号；并对该至少一个本振信号的相位和/或幅值再次进行调节，并根据再次调节的本振信号对射频信号进行混频，再次减小该混频后的信号中的该自混频信号，直至该混频后的信号中的自混频信号完全消失，或接近消失。也就是说，该实施例三中的混频杂散消除方法还可通过多次本振信号的调节，并根据多次调节后本振信号对射频信号进行混频，通过实时减小该混频后的信号中该自混频信号的生成，以实现该混频后的信号中的自混频信号的实时消除，避免该自混频信号对有用信号的干扰，更好地保证该有用信号信噪比，降低有用信号经过接收机的非线性失真，降低接收机中模拟链路的线性需求，降低模数转换及信号解调的难度。
本发明实施例四还提供一种混频杂散消除方法。图10为本发明实施例四 提供的一种混频杂散消除方法的流程图。图11为本发明实施例四提供的一种混频杂散消除方法的示意图。如图10所示，该方法可包括：
S1001、生成多个本振信号。
如图11所示，该多个本振信号可以为f(t)。该f(t)可以为本振信号生成模块根据各本振信号的频率生成的。该本振信号生成模块，可以为该接收机内部的本地振荡器。其中，各本振信号的频率可以是根据多个频带的信号频率，和预设频率确定的。该多个本振信号的频率例如可以是根据该多个频带的射频信号的频率，与该预设频率的差值确定的。该预设频率可以为接收机混频后的中频信号的中心频率，也可以为该多个频带的射频信号的中心频率。
S1002、根据该多个本振信号的频率确定自混频信号的频率，并根据该自混频信号频率，生成与该自混频信号频率相同的信号，该自混频信号包括该多个本振信号相互混频生成的混频信号。
该对消信号可以为图11中的z1(t)。该z1(t)可以为图中所示的本振信号生成模块根据该多个本振信号f(t)的频率确定自混频信号的频率，并根据该自混频信号的频率生成的。
S1003、根据该多个本振信号，对多个频带的射频信号进行混频，得到第一信号，该第一信号包括自混频信号和有用信号。
该多个频带的射频信号可以为图11所示的x(t)。S1003中例如可以是将该多个本振信号f(t)和该多个频带的射频信号x(t)均输入至混频器，由该混频器根据该多个本振信号f(t)，对多个频带的射频信号x(t)进行混频，得到第一信号y1(t)。该第一信号y1(t)中可包括有用信号和自混频信号。该第一信号y1(t)中的自混频信号包括该多个本振信号f(t)相互混频产生的混频信号。
S1004、根据一个相位调节量和一个幅值调节量，对该与自混频信号频率相同的信号的相位及幅值进行调节，获得对消信号。
该S1004中例如可以是通过调节模块根据一个相位调节量和一个幅值调节量，对与自混频信号频率相同的信号z1(t)的相位及幅值进行调节，获得对消信号z2(t)。
S1005、根据该对消信号，对该第一信号中的自混频信号进行处理，得到第二信号。
该S1005中可以是将该对消信号z2(t)和该第一信号y1(t)，输入至合路器 中，由该合路器根据该对消信号z2(t)对该第一信号y1(t)中的自混频信号进行处理，得到第二信号y2(t)。
S1006、对该第二信号进行幅值检测，得到该第二信号中的自混频信号的幅值。
该S1006中可以是检测模块对该第二信号y2(t)进行幅值检测，得到该第二信号中的自混频信号的幅值。
S1007、若该第二信号中的自混频信号的幅值大于预设幅值，根据另一个相位调节量和另一个幅值调节量，对该对消信号的相位及幅值进行调节，获得调节后的该对消信号。
若该第二信号中的自混频信号的幅值大于预设幅值，检测模块可根据该第二信号中的自混频信号的幅值确定该另一个相位调节量和该另一个幅值调节量，并将该另一个相位调节量和该另一个幅值调节量输入至调节模块，由该调节模块根据该另一个相位调节量和该另一个幅值调节量，对该对消信号的相位及幅值进行调节。
S1008、根据该第二对消信号，对该第二信号中的自混频信号进行处理。
本发明实施例使用与多个本振信号相同的参考时钟生成多个本振信号f(t)和用于对消多个本振信号混频产生的自混频信号(即杂散)所需要的对消信号，其中，对消信号与自混频信号同频、等幅、反相(也可以同相，此时对消信号与自混频信号对消时相减)，然后可以通过耦合器或者功率合成器馈入中频通道与混频信号(即接收信号与多个本振信号混频后得到的信号)合成实现对自混频信号的消除，最后得到对消自混频信号后的输出信号。本发明实施例可以进行一次性地自混频信号的对消；也可以通过对经过对消后输出的信号进行检测，根据检测结果实时控制(或调整)对消信号的幅度和相位，从而实现对自混频信号的实时对消。
本发明实施例四的一种混频杂散消除方法，可通过生成多个本振信号，根据该多个本振信号的频率确定该自混频信号的频率，并根据该自混频信号频率生成与该自混频信号的频率相同的信号，并通过对该与该自混频信号的频率相同的信号的相位和幅值进行调节，获得对消信号，使得该对消信号的频率与该自混频信号的频率相同、该对消信号的相位与该自混频信号的相位相同或相反，和对消信号的幅值与该自混频信号的幅值相同，并根据该对消 信号对该混频后的信号中的自混频信号进行处理，从而减小该混频后的信号中的自混频信号，避免自混频信号对有用信号的干扰，提高接收机的输出信噪比，降低有用信号经过接收机的非线性失真，降低接收机中模拟链路的线性需求，降低模数转换及信号解调的难度。
本发明实施例四还提供另一种混频杂散消除方法。图12为本发明实施例四提供的另一种混频杂散消除方法的流程图。图13为本发明实施例四提供的另一种混频杂散消除方法的示意图。如图12所示，该方法可包括：
S1201、生成多个本振信号。
如图13所示，该多个本振信号可以为f(t)。该f(t)可以为本振信号生成模块根据各本振信号的频率生成的。该本振信号生成模块例如可以为该接收机内部的本地振荡器。其中，各本振信号的频率可以是根据多个频带的信号频率，和预设频率确定的。该多个本振信号的频率例如可以是根据该多个频带的射频信号的频率，与该预设频率的差值确定的。该预设频率可以为接收机混频后的中频信号的中心频率，也可以为该多个频带的射频信号的中心频率。
S1202、根据该多个本振信号对多个频带的射频信号进行混频，得到第一信号，该第一信号包括有用信号和自混频信号。
该多个频带的射频信号可以为图13所示的x(t)。S1102中例如可以是将该多个本振信号f(t)和该多个频带的射频信号x(t)均输入至混频器，由该混频器根据该多个本振信号f(t)，对多个频带的射频信号x(t)进行混频，得到第一信号y1(t)。该第一信号y1(t)中可包括有用信号和自混频信号。该第一信号y1(t)中的自混频信号包括该多个本振信号f(t)相互混频产生的混频信号。
S1203、根据该多个本振信号的频率确定自混频信号的频率，并根据该自混频信号的频率从该第一信号中选取与该自混频信号的频率相同的信号。
该S1203中可以是通过选取模块根据该自混频信号的频率从该第一信号中选取与该自混频信号的频率相同的该对消信号。该选取模块可以为频率选取部件，如带通滤波器。
S1204、根据一个相位调节量和一个幅值调节量，对该与该自混频信号的频率相同的信号的相位及幅值进行调节，获得对消信号。
该S1204中例如可以是通过调节模块根据一个相位调节量和一个幅值调节量，对与该自混频信号的频率相同的信号z1(t)的相位及幅值进行调节，获 得对消信号z2(t)。
S1205、根据该对消信号，对该第一信号中的自混频信号进行处理，得到第二信号。
该S1205中可以是将该对消信号z2(t)和该第一信号y1(t)，输入至合路器中，由该合路器根据该对消信号z2(t)对该第一信号y1(t)中的自混频信号进行处理，得到第二信号y2(t)。
S1206、对该第二信号进行幅值检测，得到该第二信号中的自混频信号的幅值。
该S1206中可以是检测模块对该第二信号y2(t)进行幅值检测，得到该第二信号中的自混频信号的幅值。
S1207、若该第二信号中的自混频信号的幅值大于预设幅值，根据另一个相位调节量和另一个幅值调节量，对该对消信号的相位及幅值进行再次调节，获得再次调节的对消信号。
若该自混频信号的幅值大于预设幅值，检测模块可根据该第二信号中的自混频信号的幅值确定该另一个相位调节量和该另一个幅值调节量，并将该另一个相位调节量和该另一个幅值调节量输入至调节模块，由该调节模块根据该另一个相位调节量和该另一个幅值调节量，对该对消信号的相位及幅值进行再次调节。
S1208、根据该调节后的该对消信号，对该第二信号中的自混频信号进行处理。
本发明实施例可从混频后的信号中选取用于对消多个本振信号混频产生的自混频信号(即杂散)所需要的对消信号，其中，对消信号与自混频信号同频、等幅、反相(也可以同相，此时对消信号与自混频信号对消时相减)，然后可以通过耦合器或者功率合成器馈入中频通道与混频信号(即接收信号与多个本振信号混频后得到的信号)合成实现对自混频信号的消除，最后得到对消自混频信号后的输出信号。本发明实施例可以进行一次性地自混频信号的对消；也可以通过对经过对消后输出的信号进行检测，根据检测结果实时控制(或调整)对消信号的幅度和相位，从而实现对自混频信号的实时对消。
本发明实施例四的该另一种混频杂散消除方法，可通过根据自混频信号 的频率和混频后的信号确定与该自混频信号频率相同的信号，并通过对该与该自混频信号频率相同的信号的相位和幅值进行调节，获得对消信号，使得该对消信号的频率与该自混频信号的频率相同、该对消信号的相位与该自混频信号的相位相同或相反，和对消信号的幅值与该自混频信号的幅值相同，并根据该对消信号对该混频后的信号中的自混频信号进行处理，可减少该混频后的信号中的自混频信号，避免自混频信号对有用信号的干扰，提高接收机的输出信噪比，降低有用信号经过接收机的非线性失真，降低接收机中模拟链路的线性需求，降低模数转换及信号解调的难度。
本发明实施例四还提供又一种混频杂散消除方法。图14为本发明实施例四提供的又一种混频杂散消除方法的流程图。图15为本发明实施例四提供的又一种混频杂散消除方法的示意图。如图14所示，该方法可包括：
S1401、生成多个本振信号。
如图15所示，该多个本振信号可以为f(t)。该f(t)可以为本振信号生成模块根据各本振信号的频率生成的。该本振信号生成模块例如可以为该接收机内部的本地振荡器。其中，各本振信号的频率可以是根据多个频带的信号频率，和预设频率确定的。该多个本振信号的频率例如可以是根据该多个频带的射频信号的频率，与该预设频率的差值确定的。该预设频率可以为接收机混频后的中频信号的中心频率，也可以为该多个频带的射频信号的中心频率。
S1402、根据该多个本振信号中的至少一个本振信号对应的预设相位调节量和该至少一个本振信号对应的预设幅值调节量，对该至少一个本振信号的相位和幅值进行调节，以使得在预设信号带宽内，该调节后的该多个本振信号相互混频产生的自混频信号中同频信号的矢量和为零或接近为零。
该自混频信号包括该调节后的该多个本振信号相互混频生成的混频信号。
该S1402中可以是通过调节模块根据该至少一个本振信号对应的预设相位调节量和该至少一个本振信号对应的预设幅值调节量，对该至少一个本振信号的相位和幅值进行调节，以使得在预设信号带宽内，该调节后的该多个本振信号f(t)相互混频产生的自混频信号中同频信号的矢量和为零。
S1403、根据该调节后的该多个本振信号，对多个频带的射频信号进行混频，得到混频后的信号。
其中，该混频后的信号中该自混频信号为具有一定幅度和/或相位(可以称为矢量)的值，该矢量值可以等于S901中的预设值。
该S1403中可以是将该调节后的该多个本振信号和该多个频带的射频信号输入至混频器，由该混频器根据该调节后的该多个本振信号对该多个频带的射频信号进行混频，得到该混频后的信号y1(t)。
S1404、对该混频后的信号进行幅值检测，得到该混频后的信号中的自混频信号幅值。
该S1404中可以是检测模块对该混频后的信号y1(t)进行幅值检测，得到该混频后的信号中的自混频信号幅值。
S1405、若该自混频信号幅值大于预设幅值，根据该至少一个本振信号对应的其他相位调节量和该至少一个本振信号对应的其他幅值调节量，对该至少一个本振信号的相位及幅值进行再次调节。
若该自混频信号的幅值大于预设幅值，检测模块可根据该自混频信号的幅值确定该至少一个本振信号对应的其他相位调节量和该至少一个本振信号对应的其他幅值调节量，并将该至少一个本振信号对应的其他相位调节量和该至少一个本振信号对应的其他幅值调节量输入至调节模块，由该调节模块根据该至少一个本振信号对应的其他相位调节量和该至少一个本振信号对应的其他幅值调节量，对该至少一个本振信号的相位及幅值进行再次调节。
S1406、根据该再次调节后的该多个本振信号，对该多个频带的射频信号再次进行混频。
S1407、采用滤波器将该再次混频后的信号中该预设信号带宽外的自混频信号进行滤除。
采用该滤波器将该再次混频后的信号中的该预设带宽外的信号滤除，该滤除后的信号可以为y2(t)。
本发明实施例可对多个本振信号进行调节，使得该调节后的多个本振信号混频产生的自混频信号(即杂散)中同频信号的矢量和为零，使得根据该调节后的多个本振信号对该多个频带的射频信号进行混频的过程中，自混频信号中的同频信号产生自消除，继而消除该混频后的信号中的自混频信号。本发明实施例可以进行一次性地自混频信号的对消；也可以通过混频后的信号进行检测，根据检测结果实时控制(或调整)本振信号的幅度和相位，从 而实现对自混频信号的实时对消。
本发明实施例四的该又一种混频杂散消除方法，可通过生成的多个本振信号的相位和幅值进行调节，使得该多个本振信号相互混频的自混频信号中同频信号的矢量和为零或接近为零，继而根据该调节后的多个本振信号对多个频带的射频信号进行混频，可使得该混频后的信号中的该自混频信号为零，避免自混频信号对有用信号的干扰，提高接收机的输出信噪比，降低接收机中模拟链路的线性需求，降低模数转换及信号解调的难度。
本发明实施例五还提供一种接收机。图16为本发明实施例五提供的接收机的结构示意图。如图16所示，该接收机1600可包括：
生成模块1601，用于生成对消信号，该对消信号的频率和幅值分别与第一自混频信号的频率和幅值相同，该对消信号的相位与该第一自混频信号的相位相同或相反；其中，该第一自混频信号包括多个本振信号相互混频生成的混频信号；
处理模块1602，用于根据该对消信号，对第一信号中的该第一自混频信号进行处理，得到第二信号；该第一信号为该多个本振信号对多个频带的射频信号进行混频后的信号。
可选的，生成模块1601，具体用于：生成第三信号，该第三信号的频率与该第一自混频信号的频率相同。
接收机1600还包括：
调节模块，用于根据预设的第一相位调节量和第一幅值调节量，对该第三信号的相位及幅值进行调节，获得该对消信号。
可选的，接收机1600还包括：
第一确定模块，用于根据该多个本振信号的频率确定该第一自混频信号的频率；
生成模块1601，还用于根据该第一自混频信号的频率生成该第三信号。
可选的，接收机1600还包括：
第二确定模块，用于根据该多个本振信号的频率确定该第一自混频信号的频率；根据该第一自混频信号的频率和该第一信号确定所述第三信号。
可选的，接收机1600还包括：
混频模块，用于在该调节模块根据该第一相位调节量和该第一幅值调节 量，对该第三信号的相位及幅值进行调节获得该对消信号之前，对该多个本振信号进行混频，得到第二自混频信号；
接收机1600还包括：
第三确定模块，用于根据该第二自混频信号的相位确定该第一相位调节量，根据该自混频信号的幅值确定该第一幅值调节量。
可选的，接收机1600还包括：
第四确定模块，用于根据该第二信号确定第二相位调节量及第二幅值调节量；
该调节模块，还用于根据该第二相位调节量和所述第二幅值调节量，对该对消信号的相位及幅值进行调节；
处理模块1602，还用于根据该调节后的该对消信号，对该第二信号中的第三自混频信号进行处理；该第三自混频信号为根据该对消信号对该第一自混频信号进行处理后的信号。
可选的，接收机1600还包括：
第一检测模块，用于对该第二信号进行幅值检测，得到该第三自混频信号幅值；
该第四确定模块，还用于若该第三自混频信号幅值大于预设幅值，根据该第三自混频信号幅值确定该第二相位调节量和该第二幅值调节量。
可选的，接收机1600还包括：
第二检测模块，用于对该第二信号进行信噪比检测，得到该第二信号的信噪比；
该第四确定模块，还用于若该第二信号的信噪比小于预设信噪比值，根据该第二信号的信噪比确定该第二相位调节量和该第二幅值调节量。
本发明实施例五提供的接收机，可执行上述实施例一或二中任一所述的混频杂散消除方法，其实现过程及有益效果与上述实施例类似，在此不再赘述。
本发明实施例六还提供一种接收机。图17为本发明实施例六提供的接收机的结构示意图。如图17所示，该接收机1700可包括：
调节模块1701，用于对多个本振信号进行调节；该调节后的该多个本振信号相互混频生成的自混频信号中同频信号的矢量和为预设值；该预设值包 括零；
混频模块1702，用于根据该调节后的该多个本振信号，对多个频带的射频信号进行混频，得到混频后的信号；该混频后的信号中该自混频信号为该预设值。
可选的，在预设信号带宽内，该自混频信号中同频信号的矢量和为该预设值；该混频后的信号中该预设带宽内的该自混频信号为该预设值。
接收机1700还包括：
滤波模块，用于采用滤波器将该混频后的信号中该预设信号带宽外的该自混频信号进行滤除。
可选的，调节模块，还用于根据该多个本振信号中至少一个本振信号对应的预设相位调节量和/或该至少一个本振信号对应的预设幅值调节量，分别对该至少一个本振信号的相位和/或幅值进行调节；
接收机1700还包括：
确定模块，用于根据该混频后的信号确定该至少一个本振信号对应的其他相位调节量和/或该至少一个本振信号对应的其他幅度调节量；
调节模块，还用于根据该至少一个本振信号对应的其他相位调节量和/或该至少一个本振信号对应的其他幅值调节量，分别对该至少一个本振信号的相位和/或幅值进行再次调节；
混频模块1702，还用于根据该再次调节后的该多个本振信号，对该多个频带的射频信号进混频。
可选的，接收机1700还包括：
第一检测模块，用于对该混频后的信号进行幅值检测，得到该混频后的信号中该自混频信号幅值；
该确定模块，还用于若该自混频信号幅值大于预设幅值，根据该自混频信号幅值确定该至少一个本振信号对应的其他相位调节量和/或该至少一个本振信号对应的其他幅值调节量。
可选的，接收机1700还包括：
第二检测模块，用于对该混频后的信号进行信噪比检测，确定该混频后的信号的信噪比；
该确定模块，还用于若该混频后的信号的信噪比小于预设信噪比值，根 据该混频后的信号的信噪比确定该至少一个本振信号对应的其他相位调节量和该至少一个本振信号对应的其他幅值调节量。
本发明实施例六提供的接收机，可执行上述实施例三所述的混频杂散消除方法，其实现过程及有益效果与上述实施例类似，在此不再赘述。
本发明实施例七还提供一种接收机。图18为本发明实施例七提供的一种接收机的结构示意图。如图18所示，该接收机1800可包括：生成模块1801、混频模块1802、对消模块1803、调节模块1804和检测模块1805。
其中，生成模块1801与混频模块1802和对消模块1803连接；对消模块1803与混频模块1802和调节模块1804连接，检测模块1805还与对消模块1803和调节模块1804连接。
生成模块1801，用于生成多个本振信号。
混频模块1802，可以是混频器，用于根据该多个本振信号多个频带的射频信号进行混频，得到第一信号，该第一信号包括自混频信号和有用信号。
生成模块1801，还用于根据该多个本振信号的频率确定自混频信号的频率，并根据该自混频信号频率，生成与该自混频信号频率相同的信号。其中，该自混频信号包括该多个本振信号相互混频生成的混频信号。
调节模块1804，还用于根据一个相位调节量和一个幅值调节量，对该与自混频信号频率相同的信号的相位及幅值进行调节，获得对消信号。
对消模块1803，用于根据该对消信号，对该第一信号中的自混频信号进行处理，得到第二信号。对消模块1803可以为合路器或耦合器。
检测模块1805，用于对该第二信号进行幅值检测，得到该第二信号中的自混频信号的幅值。
调节模块1804，还用于若该第二信号中的自混频信号的幅值大于预设幅值，根据另一个相位调节量和另一个幅值调节量，对该对消信号的相位及幅值进行调节，获得调节后的该对消信号。
对消模块1803，还用于根据该第二对消信号，对该第二信号中的自混频信号进行处理。
本发明实施例七还提供另一种接收机。图19为本发明实施例七提供的另一种接收机的结构示意图。如图19所示，该接收机1900可包括：生成模块1901、混频模块1902、选取模块1903、调节模块1904、对消模块1905和检 测模块1906。
生成模块1901与混频模块1902连接；混频模块1902还与选取模块1903和对消模块1905连接；选取模块1903还与调节模块1904连接；检测模块1906还与对消模块1905和调节模块1904连接。对消模块1905可以为合路器或耦合器。
其中，生成模块1901，用于生成多个本振信号。
混频模块1902，用于根据该多个本振信号对多个频带的射频信号进行混频，得到第一信号，该第一信号包括有用信号和自混频信号。
选取模块1903，用于根据该多个本振信号的频率确定自混频信号的频率，并根据该自混频信号的频率从该第一信号中选取与该自混频信号的频率相同的信号。
调节模块1904，用于根据一个相位调节量和一个幅值调节量，对该与该自混频信号的频率相同的信号的相位及幅值进行调节，获得对消信号。
对消模块1905，用于根据该对消信号，对该第一信号中的自混频信号进行处理，得到第二信号。
检测模块1906，用于对该第二信号进行幅值检测，得到该第二信号中的自混频信号的幅值。
调节模块1904，还用于若该第二信号中的自混频信号的幅值大于预设幅值，根据另一个相位调节量和另一个幅值调节量，对该对消信号的相位及幅值进行再次调节，获得再次调节的对消信号。
对消模块1905，还用于根据该调节后的该对消信号，对该第二信号中的自混频信号进行处理。
本发明实施例七提供的接收机，均可用于执行上述实施例一或二中的混频杂散消除方法，其有益效果与上述实施例类似，再此不再赘述。
本发明实施例八还提供一种接收机。图20为本发明实施例八提供的一种接收机的结构示意图。如图20所示，该接收机2000可包括：生成模块2001、调节模块2002、混频模块2003、检测模块2004和滤波模块2005。
生成模块2001可与调节模块2002连接，调节模块2002可与混频模块2003和检测模块2004连接。检测模块2004还与混频模块2003连接。
其中，生成模块2001可用于生成多个本振信号。
调节模块2002，用于根据该多个本振信号中的至少一个本振信号对应的预设相位调节量和该至少一个本振信号对应的预设幅值调节量，对该至少一个本振信号的相位和幅值进行调节，以使得在预设信号带宽内，该调节后的该多个本振信号相互混频产生的自混频信号中同频信号的矢量和为零。
混频模块2003，用于根据该调节后的该多个本振信号，对多个频带的射频信号进行混频，得到混频后的信号。其中，该混频后的信号中该自混频信号为具有一定幅度和/或相位(可以称为矢量)的值，该矢量值可以等于S901中的预设值。
检测模块2004，用于对该混频后的信号进行幅值检测，得到该混频后的信号中的自混频信号幅值。
调节模块2002，还用于若该自混频信号幅值大于预设幅值，根据该至少一个本振信号对应的其他相位调节量和该至少一个本振信号对应的其他幅值调节量，对该至少一个本振信号的相位及幅值进行再次调节。
混频模块2003，还用于根据该再次调节后的该多个本振信号，对该多个频带的射频信号再次进行混频。
滤波模块2005，用于将该再次混频后的信号中该预设信号带宽外的自混频信号进行滤除。
本发明实施例八提供的接收机，均可用于执行上述实施例三中的混频杂散消除方法，其有益效果与上述实施例类似，再此不再赘述。
本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成，前述的程序可以存储于一计算机可读取存储介质中，该程序在执行时，执行包括上述方法实施例的步骤；而前述的存储介质包括：ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (26)

  1. 一种混频杂散消除方法，其特征在于，包括：
    生成对消信号，所述对消信号的频率和幅值分别与第一自混频信号的频率和幅值相同，所述对消信号的相位与所述第一自混频信号的相位相同或相反；其中，所述第一自混频信号包括多个本振信号相互混频生成的混频信号；
    根据所述对消信号，对第一信号中的所述第一自混频信号进行处理，得到第二信号；所述第一信号为所述多个本振信号对多个频带的射频信号进行混频后的信号。
  2. 根据权利要求1所述的方法，其特征在于，所述生成对消信号包括：
    生成第三信号，所述第三信号的频率与所述第一自混频信号的频率相同；
    根据预设的第一相位调节量和第一幅值调节量，对所述第三信号的相位及幅值进行调节，获得所述对消信号。
  3. 根据权利要求2所述的方法，其特征在于，所述生成第三信号包括：
    根据所述多个本振信号的频率确定所述第一自混频信号的频率；
    根据所述第一自混频信号的频率生成所述第三信号。
  4. 根据权利要求2所述的方法，其特征在于，所述生成第三信号包括：
    根据所述多个本振信号的频率确定所述第一自混频信号的频率；
    根据所述第一自混频信号的频率和所述第一信号确定所述第三信号。
  5. 根据权利要求2-4中任一项所述的方法，其特征在于，所述根据预设的第一相位调节量和第一幅值调节量，对所述第三信号的相位及幅值进行调节，获得所述对消信号之前，所述方法还包括：
    对所述多个本振信号进行混频，得到第二自混频信号；
    根据所述第二自混频信号的相位确定所述第一相位调节量，根据所述自混频信号的幅值确定所述第一幅值调节量。
  6. 根据权利要求2-5中任一项所述的方法，其特征在于，所述方法还包括：
    根据所述第二信号确定第二相位调节量及第二幅值调节量；
    根据所述第二相位调节量和所述第二幅值调节量，对所述对消信号的相位及幅值进行调节；
    根据所述调节后的所述对消信号，对所述第二信号中的第三自混频信号 进行处理；所述第三自混频信号为根据所述对消信号对所述第一自混频信号进行处理后的信号。
  7. 根据权利要求6所述的方法，其特征在于，所述根据所述第二信号确定第二相位调节量及第二幅值调节量包括：
    对所述第二信号进行幅值检测，得到所述第三自混频信号幅值；
    若所述第三自混频信号幅值大于预设幅值，根据所述第三自混频信号幅值确定所述第二相位调节量和所述第二幅值调节量。
  8. 根据权利要求6所述的方法，其特征在于，所述根据所述第二信号确定第二相位调节量及第二幅值调节量包括：
    对所述第二信号进行信噪比检测，得到所述第二信号的信噪比；
    若所述第二信号的信噪比小于预设信噪比值，根据所述第二信号的信噪比确定所述第二相位调节量和所述第二幅值调节量。
  9. 一种混频杂散消除方法，其特征在于，包括：
    对多个本振信号进行调节；所述调节后的所述多个本振信号相互混频生成的自混频信号中同频信号的矢量和为预设值；所述预设值包括零；
    根据所述调节后的所述多个本振信号，对多个频带的射频信号进行混频，得到混频后的信号。
  10. 根据权利要求9所述的方法，其特征在于，在预设信号带宽内，所述自混频信号中同频信号的矢量和为该预设值；
    所述方法还包括：
    采用滤波器将所述混频后的信号中所述预设信号带宽外的所述自混频信号进行滤除。
  11. 根据权利要求9或10所述的方法，其特征在于，所述对所述多个本振信号进行调节包括：
    根据所述多个本振信号中至少一个本振信号对应的预设相位调节量和/或所述至少一个本振信号对应的预设幅值调节量，分别对所述至少一个本振信号的相位和/或幅值进行调节；
    所述方法还包括：
    根据所述混频后的信号确定所述至少一个本振信号对应的其他相位调节量和/或所述至少一个本振信号对应的其他幅度调节量；
    根据所述至少一个本振信号对应的其他相位调节量和/或所述至少一个本振信号对应的其他幅值调节量，分别对所述至少一个本振信号的相位和/或幅值进行再次调节；
    根据所述再次调节后的所述多个本振信号，对所述多个频带的射频信号进混频。
  12. 根据权利要求11所述的方法，其特征在于，所述根据所述混频后的信号确定所述至少一个本振信号对应的其他相位调节量和/或所述至少一个本振信号对应的其他组幅值调节量包括：
    对所述混频后的信号进行幅值检测，得到所述混频后的信号中所述自混频信号幅值；
    若所述自混频信号幅值大于预设幅值，根据所述自混频信号幅值确定所述至少一个本振信号对应的其他相位调节量和/或所述至少一个本振信号对应的其他幅值调节量。
  13. 根据权利要求11所述的方法，其特征在于，所述根据所述混频后的信号确定所述至少一个本振信号对应的其他相位调节量和/或所述至少一个本振信号对应的其他幅值调节量包括：
    对所述混频后的信号进行信噪比检测，确定所述混频后的信号的信噪比；
    若所述混频后的信号的信噪比小于预设信噪比值，根据所述混频后的信号的信噪比确定所述至少一个本振信号对应的其他相位调节量和所述至少一个本振信号对应的其他幅值调节量。
  14. 一种接收机，其特征在于，包括：
    生成模块，用于生成对消信号，所述对消信号的频率和幅值分别与第一自混频信号的频率和幅值相同，所述对消信号的相位与所述第一自混频信号的相位相同或相反；其中，所述第一自混频信号包括多个本振信号相互混频生成的混频信号；
    处理模块，用于根据所述对消信号，对第一信号中的所述第一自混频信号进行处理，得到第二信号；所述第一信号为所述多个本振信号对多个频带的射频信号进行混频后的信号。
  15. 根据权利要求14所述的接收机，其特征在于，
    所述生成模块，具体用于：生成第三信号，所述第三信号的频率与所述 第一自混频信号的频率相同；
    所述接收机还包括：
    调节模块，用于根据预设的第一相位调节量和第一幅值调节量，对所述第三信号的相位及幅值进行调节，获得所述对消信号。
  16. 根据权利要求15所述的接收机，其特征在于，
    接收机还包括：
    第一确定模块，用于根据所述多个本振信号的频率确定所述第一自混频信号的频率；
    所述生成模块，还用于根据所述第一自混频信号的频率生成所述第三信号。
  17. 根据权利要求15所述的接收机，其特征在于，
    所述接收机还包括：
    第二确定模块，用于根据所述多个本振信号的频率确定所述第一自混频信号的频率；根据所述第一自混频信号的频率和所述第一信号确定所述第三信号。
  18. 根据权利要求15-17中任一项所述的接收机，其特征在于，
    所述接收机还包括：
    混频模块，用于在所述调节模块根据所述第一相位调节量和所述第一幅值调节量，对所述第三信号的相位及幅值进行调节获得所述对消信号之前，对所述多个本振信号进行混频，得到第二自混频信号；
    所述接收机还包括：
    第三确定模块，用于根据所述第二自混频信号的相位确定所述第一相位调节量，根据所述自混频信号的幅值确定所述第一幅值调节量。
  19. 根据权利要求15-18中任一项所述的接收机，其特征在于，
    所述接收机还包括：
    第四确定模块，用于根据所述第二信号确定第二相位调节量及第二幅值调节量；
    所述调节模块，还用于根据所述第二相位调节量和所述第二幅值调节量，对所述对消信号的相位及幅值进行调节；
    所述处理模块，还用于根据所述调节后的所述对消信号，对所述第二信 号中的第三自混频信号进行处理；所述第三自混频信号为根据所述对消信号对所述第一自混频信号进行处理后的信号。
  20. 根据权利要求19所述的接收机，其特征在于，
    所述接收机还包括：
    第一检测模块，用于对所述第二信号进行幅值检测，得到所述第三自混频信号幅值；
    所述第四确定模块，还用于若所述第三自混频信号幅值大于预设幅值，根据所述第三自混频信号幅值确定所述第二相位调节量和所述第二幅值调节量。
  21. 根据权利要求19所述的接收机，其特征在于，所述接收机还包括：
    第二检测模块，用于对所述第二信号进行信噪比检测，得到所述第二信号的信噪比；
    所述第四确定模块，还用于若所述第二信号的信噪比小于预设信噪比值，根据所述第二信号的信噪比确定所述第二相位调节量和所述第二幅值调节量。
  22. 一种接收机，其特征在于，包括：
    调节模块，用于对多个本振信号进行调节；所述调节后的所述多个本振信号相互混频生成的自混频信号中同频信号的矢量和为预设值；所述预设值包括零；
    混频模块，用于根据所述调节后的所述多个本振信号，对多个频带的射频信号进行混频，得到混频后的信号。
  23. 根据权利要求22所述的接收机，其特征在于，在预设信号带宽内，所述自混频信号中同频信号的矢量和为该预设值；
    所述接收机还包括：
    滤波模块，用于采用滤波器将所述混频后的信号中所述预设信号带宽外的所述自混频信号进行滤除。
  24. 根据权利要求22或23所述的接收机，其特征在于，
    所述调节模块，还用于根据所述多个本振信号中至少一个本振信号对应的预设相位调节量和/或所述至少一个本振信号对应的预设幅值调节量，分别对所述至少一个本振信号的相位和/或幅值进行调节；
    所述接收机还包括：
    确定模块，用于根据所述混频后的信号确定所述至少一个本振信号对应的其他相位调节量和/或所述至少一个本振信号对应的其他幅度调节量；
    所述调节模块，还用于根据所述至少一个本振信号对应的其他相位调节量和/或所述至少一个本振信号对应的其他幅值调节量，分别对所述至少一个本振信号的相位和/或幅值进行再次调节；
    所述混频模块，还用于根据所述再次调节后的所述多个本振信号，对所述多个频带的射频信号进混频。
  25. 根据权利要求24所述的接收机，其特征在于，
    所述接收机还包括：
    第一检测模块，用于对所述混频后的信号进行幅值检测，得到所述混频后的信号中所述自混频信号幅值；
    所述确定模块，还用于若所述自混频信号幅值大于预设幅值，根据所述自混频信号幅值确定所述至少一个本振信号对应的其他相位调节量和/或所述至少一个本振信号对应的其他幅值调节量。
  26. 根据权利要求24所述的接收机，其特征在于，
    所述接收机还包括：
    第二检测模块，用于对所述混频后的信号进行信噪比检测，确定所述混频后的信号的信噪比；
    所述确定模块，还用于若所述混频后的信号的信噪比小于预设信噪比值，根据所述混频后的信号的信噪比确定所述至少一个本振信号对应的其他相位调节量和所述至少一个本振信号对应的其他幅值调节量。
PCT/CN2015/084223 2015-07-16 2015-07-16 混频杂散消除方法及接收机 WO2017008302A1 (zh)

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CN1845464A (zh) * 2005-04-07 2006-10-11 上海华为技术有限公司 抑制本振泄漏的电路
CN101453226A (zh) * 2007-11-30 2009-06-10 松下电器产业株式会社 本振泄漏消除装置及方法
WO2014067571A1 (en) * 2012-10-31 2014-05-08 Telefonaktiebolaget L M Ericsson (Publ) A homodyne receiver with improved linearity
CN103873157A (zh) * 2012-12-10 2014-06-18 北京普源精电科技有限公司 一种具有零频抑制功能的频谱分析仪

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1845464A (zh) * 2005-04-07 2006-10-11 上海华为技术有限公司 抑制本振泄漏的电路
CN101453226A (zh) * 2007-11-30 2009-06-10 松下电器产业株式会社 本振泄漏消除装置及方法
WO2014067571A1 (en) * 2012-10-31 2014-05-08 Telefonaktiebolaget L M Ericsson (Publ) A homodyne receiver with improved linearity
CN103873157A (zh) * 2012-12-10 2014-06-18 北京普源精电科技有限公司 一种具有零频抑制功能的频谱分析仪

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