CN108872925B - Four-channel multi-frequency-band satellite navigation signal receiver - Google Patents
Four-channel multi-frequency-band satellite navigation signal receiver Download PDFInfo
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- CN108872925B CN108872925B CN201810818448.2A CN201810818448A CN108872925B CN 108872925 B CN108872925 B CN 108872925B CN 201810818448 A CN201810818448 A CN 201810818448A CN 108872925 B CN108872925 B CN 108872925B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
- G01S1/04—Details
- G01S1/045—Receivers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0205—Details
- G01S5/0221—Receivers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a four-channel multi-band satellite navigation signal receiver, which comprises four independent radio frequency channels, wherein each radio frequency channel comprises a low noise amplifier, an active quadrature mixer, a first programmable gain amplifier, a second programmable gain amplifier, a first active low-pass filter, a second active low-pass filter, a first variable gain amplifier, a second variable gain amplifier, a first analog-to-digital converter, a second analog-to-digital converter, a first analog output buffer, a second analog output buffer, a first data selector, a second data selector and a frequency synthesizer. The four-channel multi-band satellite navigation signal receiver provided by the invention can meet the multi-band work, has a low-noise and high-gain radio frequency front end circuit module, and greatly improves the noise performance and the multi-mode multi-band signal processing capability of the radio frequency front end of the whole receiver. The system has simple and reliable structure, and is convenient for realizing the processing of the single-chip integrated full-mode full-frequency satellite navigation signal.
Description
Technical Field
The invention relates to the technical field of wireless radio frequency communication, in particular to a four-channel multi-frequency-band satellite navigation signal receiver capable of receiving the existing various satellite navigation.
Background
Global Navigation Satellite Systems (GNSS) can realize all-weather, global and high-precision continuous navigation and positioning, and have been developed very rapidly in recent years. With implementation of a modernization plan of a GPS (Global Positioning System) system and construction and continuous perfection of Russian GLONASS (Grosvenor), european Galileo (Galileo), china Beidou and other satellite navigation and positioning systems, available satellite navigation and positioning signal resources are greatly enriched, and the development of a multi-band multi-system satellite navigation receiver is a necessary development trend.
The structure of the satellite navigation circuit of the prior multi-band multi-system is complex, the technical difficulty is high, the circuit scale is large, the realization reliability is relatively poor, and the realization cost is relatively high.
Disclosure of Invention
Aiming at the problems of complex structure, high technical difficulty, poor reliability and higher cost of a multi-band multi-system satellite navigation signal receiver in the prior art, the invention provides a four-channel multi-band satellite navigation signal receiver.
The four-channel multi-band satellite navigation signal receiver provided by the embodiment of the invention comprises four independent radio frequency channels, wherein each radio frequency channel comprises a low noise amplifier, an active quadrature mixer, a first programmable gain amplifier, a second programmable gain amplifier, a first active low-pass filter, a second active low-pass filter, a first variable gain amplifier, a second variable gain amplifier, a first analog-to-digital converter, a second analog-to-digital converter, a first analog output buffer, a second analog output buffer, a first data selector, a second data selector and a frequency synthesizer;
the signal input end of the low-noise amplifier is connected with the signal receiving unit, and the signal output end of the low-noise amplifier is connected with the active quadrature mixer; the frequency synthesizer divides the frequency by a two-frequency divider and then is connected with the active quadrature mixer;
the active quadrature mixer is used for down-converting the signal amplified by the low-noise amplifier into an I signal with the phase of 0 degrees and a Q signal with the phase of 90 degrees, the frequency set by the frequency synthesizer is divided into half of working frequency signals by the two frequency dividers, the working frequency signals are mixed with the I signal frequency by the active quadrature mixer, and the working frequency signals are mixed with the Q signal frequency;
the active quadrature mixer sends the mixed I signal to a first programmable gain amplifier, the first programmable gain amplifier sends the I signal to a first variable gain amplifier through a first active low-pass filter, the first variable gain amplifier sends the I signal to a first analog output buffer and a first analog-to-digital converter respectively, the first analog output buffer and the first analog-to-digital converter send the I signal to a first data selector respectively, and the first data selector outputs the I signal;
the active quadrature mixer sends the mixed Q signal to a second programmable gain amplifier, the second programmable gain amplifier sends the Q signal to a second variable gain amplifier through a second active low-pass filter, the second variable gain amplifier sends the Q signal to a second analog output buffer and a second analog-to-digital converter respectively, the second analog output buffer and the second analog-to-digital converter send the Q signal to a second data selector, and the second data selector outputs the Q signal;
the integrated frequency device of four independent radio frequency channels receives the same sampling clock signal.
The four-channel multi-band satellite navigation signal receiver provided by the embodiment of the invention is composed of four multi-mode multi-band radio frequency channels, and according to the characteristics of the multi-mode satellite navigation signals, the frequency point and the bandwidth of the navigation signals which need to be processed by each channel are planned, so that the four-channel integrated receiving of the multi-band is possible. The multi-band operation is satisfied, the radio frequency front-end circuit module with low noise and high gain is provided, and the noise performance and the multi-mode multi-band signal processing capability of the radio frequency front-end of the whole receiver are improved. The system has simple and reliable structure, and is convenient for realizing the processing of the single-chip integrated full-mode multi-band satellite navigation signals.
Preferably, each radio frequency channel includes a digital control circuit, and an input end of the digital control circuit is coupled to an output signal of the variable gain amplifier, and the output signal of the variable gain amplifier is processed and then sent to the first active low-pass filter, the first variable gain amplifier, the second active low-pass filter and the second variable gain amplifier respectively.
Preferably, the system further comprises a first direct current offset correction module and a second direct current offset correction module, wherein the first offset correction module is connected with the first active low-pass filter in parallel, and the second offset correction module is connected with the second active low-pass filter in parallel.
Preferably, the system further comprises a third direct current bias correction module and a fourth direct current bias correction module, wherein the third bias correction module is connected with the first programmable gain amplifier in parallel, and the fourth bias correction module is connected with the second programmable gain amplifier in parallel.
Preferably, the integrated frequency divider is set by an on-chip register and comprises a reference clock frequency divider, a voltage-controlled oscillator, a low-pass filter, a charge pump, a phase discriminator, an 8/9 frequency divider, a digital frequency divider and a frequency divider;
the signal input end of the reference clock frequency divider is externally connected with a reference clock, the signal input end of the phase discriminator is respectively connected with the signal output end of the reference clock frequency divider and the signal output end of the digital frequency divider, the signal output end of the phase discriminator is connected with the signal input end of the charge pump, the charge pump is connected with the signal input end of the voltage-controlled oscillator through the low-pass filter, the signal output end of the voltage-controlled oscillator is respectively connected with the signal input ends of the frequency divider and the 8/9 frequency divider, the signal output end of the frequency divider is connected with the active quadrature mixer, and the signal output end of the 8/9 frequency divider is connected with the signal input end of the digital frequency divider;
the reference signal frequency divider is used for dividing a reference clock signal into preset frequency signals and outputting the frequency signals to the phase discriminator, and the phase discriminator drives the charge pump to generate voltage signals according to the phase differences of signals after the input reference clock frequency dividing signal and the voltage-controlled oscillator output signal pass through the 8/9 frequency divider and the digital frequency divider, and the voltage signals are filtered by the low-pass filter and then drive the voltage-controlled oscillator to oscillate, so that the oscillator finally oscillates at the preset working frequency; the preset working frequency is output to the corresponding radio frequency channel after being divided by two frequency dividers.
Preferably, the low noise amplifier supports frequency points of 1.1 to 1.7GHZ, and the low noise amplifier is used for amplifying a single-ended signal input by the signal receiving unit and converting the single-ended signal into a differential signal.
Preferably, the active quadrature mixer comprises a quadrature active down-converter for down-converting and signal amplifying the signal received into the low noise amplifier.
Preferably, the active low-pass filter is a chebyshev type low-pass filter, and is used for filtering the low intermediate frequency signal output by the programmable gain amplifier.
Preferably, the frequency synthesizer is an integer divide-by-frequency synthesizer, wherein the first channel and the fourth channel each comprise two voltage-controlled oscillators operating near 2.4GHz and 3.0GHz frequency bands, respectively, each channel is configured by software to support two operating frequency band selections of 1.2GHz and 1.5GHz, the second channel and the third channel each comprise one voltage-controlled oscillator operating near 2.4GHz frequency band, and each channel is configured by software to support 1.2GHz and operating frequency bands.
Preferably, each of the four independent radio frequency channels is configured in a low intermediate frequency mode of operation, each radio frequency channel being configured as follows:
drawings
FIG. 1 is a schematic diagram of a four-channel multi-band satellite navigation model receiver according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a radio frequency channel structure of each of four-channel multi-band satellite navigation model receivers according to an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
Examples:
as shown in fig. 1 and fig. 2, the four-channel multi-band satellite navigation signal receiver provided by the embodiment of the invention includes four independent radio frequency channels, each radio frequency channel includes a low noise amplifier LNA, an active quadrature mixer, a first programmable gain amplifier PGA, a second programmable gain amplifier PGA, a first active low pass filter LPF, a second active low pass filter LPF, a first variable gain amplifier VGA, a second variable gain amplifier VGA, a first analog-to-digital converter ADC, a second analog-to-digital converter ADC, a first analog output buffer BUF, a second analog output buffer BUF, a first data selector MUX, a second data selector MUX, and a frequency synthesizer LO;
the input end of the low noise amplifier signal LNA is connected with the signal receiving unit. The LNA signal output end of the low noise amplifier is connected with the active quadrature mixer; the frequency synthesizer LO divides the frequency by a two-frequency divider and then is connected with an active quadrature mixer;
the active quadrature mixer is used for down-converting the signal amplified by the low noise amplifier LNA into an I signal with the phase of 0 degrees and a Q signal with the phase of 90 degrees, the frequency set by the frequency synthesizer LO is divided into half working frequency signals by the two frequency dividers, the working frequency signals are mixed with the I signal frequency by the active quadrature mixer, and the working frequency signals are mixed with the Q signal frequency;
the active quadrature mixer sends the mixed I signal to a first programmable gain amplifier PGA, the first programmable gain amplifier PGA sends the I signal to a first variable gain amplifier VGA through a first active low pass filter LPF, the first variable gain amplifier VGA sends the I signal to a first analog output buffer BUF and a first analog-to-digital converter ADC respectively, the first analog output buffer BUF and the first analog-to-digital converter ADC send the I signal to a first data selector MUX respectively, and the first data selector MUX outputs the I signal;
the active quadrature mixer sends the mixed Q signal to a second programmable gain amplifier PGA, the second programmable gain amplifier PGA sends the Q signal to a second variable gain amplifier VGA through a second active low pass filter LPF, the second variable gain amplifier VGA sends the Q signal to a second analog output buffer BUF and a second analog-to-digital converter ADC respectively, the second analog output buffer BUF and the second analog-to-digital converter ADC send the Q signal to a second data selector MUX respectively, and the second data selector outputs the Q signal;
the integrated frequency device LO of four independent radio frequency channels receives the same sampling clock signal.
The four-channel multi-band satellite navigation signal receiver provided by the embodiment of the invention is composed of four multi-mode multi-band radio frequency channels, and according to the characteristics of the multi-mode satellite navigation signals, the frequency point and the bandwidth of the navigation signals which need to be processed by each channel are planned, so that the four-channel integrated receiving of the multi-band is possible. The multi-band working, low-noise and high-gain radio frequency front end circuit module is satisfied, and the noise performance and the multi-mode multi-band signal processing capability of the radio frequency front end of the whole receiver are improved. The system has simple and reliable structure, and is convenient for realizing the processing of the single-chip integrated full-mode multi-band satellite navigation signals.
The low-noise amplifier LNA is single-ended input and supports the frequency point work of 1.1GHZ to 1.7GHZ, and the low-noise amplifier LNA is used for amplifying a single-ended signal input by the signal receiving unit and converting the single-ended signal into a differential signal. The signal receiving unit may be a satellite signal receiving antenna. In one embodiment, the signal input of each low noise amplifier LNA is connected to a receiving antenna. The four-channel multi-band satellite navigation signal receiver provided by the invention is provided with four satellite signal receiving antennas, and each satellite signal receiving antenna is used for accessing the received satellite signal into a corresponding radio frequency channel. In another embodiment, the four-channel multi-band satellite navigation signal receiver provided by the invention is provided with only one satellite signal receiving antenna, the satellite signal receiving antenna divides the received satellite navigation signal into four paths of radio frequency signals through a splitter or a duplexer, and each path of radio frequency signal is connected into a low noise amplifier LNA of one radio frequency channel.
In a preferred embodiment, each radio frequency channel includes a digital CONTROL circuit AGC-CONTROL, and an input terminal of the digital CONTROL circuit AGC-CONTROL is coupled to an output signal of the variable gain amplifier VGA, and the obtained output signal of the variable gain amplifier VGA is processed and then sent to the first active low-pass filter LPF, the first variable gain amplifier VGA, the second active low-pass filter LPF and the second variable gain amplifier VGA, respectively. The first active low-pass filter LPF, the first variable gain amplifier VGA and the digital CONTROL circuit AGC-CONTROL integrally form an automatic gain controller AGC. The first active low-pass filter LPF is a chebyshev type low-pass filter, and is configured to perform filtering processing on the low intermediate frequency signal output by the first programmable gain amplifier PGA, and filter out a high frequency signal doped in the low intermediate frequency signal to obtain a pure low intermediate frequency signal. The first active low-pass filter LPF has an out-of-band rejection of more than 20dB at a 1.5 bandwidth, and an in-band ripple of < 1dB; the bandwidth is configurable, the gain is 0 dB-42 dB, the step is 6dB, and the gain is controlled by the digital CONTROL circuit AGC-CONTROL.
The automatic gain controller AGC accurately controls the amplitude of an output signal, and supports a dynamic adjustment range of 47.5dB (the AGC controllable gain of the automatic gain controller comprises two parts, wherein the first part is an active low-pass filter LPF and a gain adjustment range of 0 dB-42 dB, and the second part is a variable gain amplifier VGA and a gain adjustment range of 0 dB-5.5 dB), and the digital gain control mode is realized.
In a preferred embodiment, the circuit further comprises a first dc offset correction module DCOC, a second dc offset correction module DCOC, a third dc offset correction module DCOC and a fourth dc offset correction module DCOC, wherein the first dc offset correction module DCOX is connected in parallel with the first low-pass filter LPF, the third dc offset correction module DCOC is connected in parallel with the first programmable gain amplifier PGA, the second dc offset correction module DCOX is connected in parallel with the second low-pass filter LPF, and the fourth dc offset correction module DCOC is connected in parallel with the second programmable gain amplifier PGA. The direct current offset modification module suppresses the direct current offset signal.
Preferably, the integrated frequency Divider is set by an on-chip register, and comprises an input reference clock frequency Divider REF Divider, a voltage-controlled oscillator VCO, a low-pass filter, a charge pump CP, a phase detector PFD, an 8/9 frequency Divider 8/9Divider, a Digital frequency Divider Digital Divider and a frequency Divider DIV2;
the signal input end of the phase discriminator PFD is respectively connected with the signal output ends of the reference clock Divider REF Divider and the Digital Divider Digital Divider, the signal output end of the phase discriminator PFD is connected with the signal input end of a charge pump CP, the charge pump CP is connected with the signal input end of the voltage-controlled oscillator VCO through a low-pass filter, the signal output end of the voltage-controlled oscillator VCO is respectively connected with the signal input ends of the frequency dividers DIV2 and the 8/9 frequency Divider, the signal output end of the frequency Divider DIV2 is connected with the active quadrature mixer, and the signal output end of the 8/9 frequency Divider is connected with the signal input end of the Digital Divider Digital Divider;
the reference signal frequency Divider REF Divider is used for dividing a reference clock signal into preset frequency signals and outputting the frequency signals to the phase discriminator, the phase discriminator compares the phase difference of signals after the input reference clock frequency division signal and the VCO output signal pass through the 8/9 frequency Divider and the digital frequency Divider, the charging pump is driven to generate voltage signals according to the phase difference, and the voltage signals are filtered by the low-pass filter and then drive the VCO to oscillate, so that the oscillator finally oscillates at the preset working frequency; the preset working frequency is output to the corresponding radio frequency channel after being divided by two frequency dividers. .
Preferably, the active mixer comprises a quadrature active downconverter, employing an I/Q double balanced architecture. The quadrature active type down converter is used for down-converting and amplifying the signal received by the low noise amplifier.
The programmable gain amplifier PGA finishes amplifying the low intermediate frequency signal output by the active quadrature mixer, and suppresses the dc offset signal by the parallel dc offset correction module DCOC. The controllable gain range of the programmable gain amplifier PGAD is divided into 4 steps: 0dB, 6dB, 12dB and 18dB.
The controllable gain range of the variable gain amplifier VGA is 0 dB-5.5 dB, the step is 0.5dB, and the variable gain amplifier VGA is single-stage resistance feedback type.
The analog-to-digital converter ADC is of a 2bit Flash structure, full range voltage is +/-0.5V, an output format is binary codes, and complementary codes are binary codes or symbol codes.
The analog-to-digital converter ADC output code format is as follows:
the sampling clocks of the analog-to-digital converters ADC of the four radio frequency channels are homologous, and are input by an external reference clock, and the external reference frequencies of 1/2,1,2 and 4 times can be generated through a clock processing circuit and are uniformly supplied to the four radio frequency channels.
The analog output buffer BUF directly outputs an analog intermediate frequency signal output by the gain amplifier VGA and supports directly driving the external analog-to-digital converter ADC to work.
Preferably, the frequency synthesizer LO is an integer divide-by-frequency type, wherein the first channel and the fourth channel each comprise two voltage-controlled oscillators operating near the 2.4GHz and 3.0GHz frequency bands, respectively, each channel being configured by software to support two operating frequency band selections of 1.2GHz and 1.5GHz, and the second channel and the third channel each comprise one voltage-controlled oscillator operating near the 2.4GHz frequency band. The frequency signal of the frequency synthesizer LO generates two paths of I/Q frequency signals through a two-way frequency divider, and the I/Q frequency signals are sent to an active quadrature mixer for mixing. Each channel is available to support 1.2GHz and operating frequency bands through software settings.
Taking typical 10 frequency point operation in the measurement field as an example, at this time, each radio frequency channel of the receiver is configured according to a low intermediate frequency operation mode, and a frequency point GPS specifically supported in the configuration operation mode includes: l1, L2 and L5, galileo includes: e1, E5a, E5b and E6, the big Dipper comprises: b1, B2 and B3, glonass comprises: g1, G2 and G3. The specific configuration is shown in the first table, wherein the first VCO is set to 1166MHz, and can receive the GPS L5 and Galileo E5a frequency point signals at the same time; the channel two VCO is set to 1217MHz, and can receive GPS L2, glonass G3, beidou B2 and Galileo E5B frequency point signals at the same time; the channel three VCO is set to 1258MHz, and can simultaneously receive Glonass G2, beidou B3 and Galileo E6 frequency point signals; the four-channel VCO is set to 1584MHz and can simultaneously receive Beidou B1, GPS L1, glonassG1 and Galileo E6 frequency point signals:
the four-channel multi-band satellite navigation receiver provided by the embodiment of the invention has the characteristics of low complexity and high reliability, does not need a complex time division multiplexing control system and an outer die, has strong integration and is convenient to apply. The front-end module comprises a gain-adjustable low noise amplifier LNA, an active quadrature mixer, a configurable frequency synthesizer, a configurable low-pass filter, an automatic gain control amplifier and a digital-to-analog converter circuit, wherein each circuit is of a sub-module structure; the LNA input circuit is simple, and satellite navigation signals in the frequency point range of 1.1 GHz-1.7 GHz can be well received without externally adding matching circuits such as LC.
The four-channel multi-band satellite navigation circuit provided by the embodiment of the invention is simple and reliable, and does not need a complex time division multiplexing control system and an image suppression circuit. According to the LNA input method, a peripheral LC input impedance matching network is not needed for the LNA input of each channel, so that full-band signal self-matching is realized, the number of peripheral devices is reduced, the system is easy to integrate, and meanwhile, the cost of each system is reduced. The invention does not need to be configured with a plurality of low noise amplifiers/mixers and off-chip support accessories for each radio frequency channel, and has the remarkable advantages of good integrability and low integration cost.
The LNA output circuit of the low noise amplifier is directly connected with the post-stage active quadrature mixer to realize the full-band operation requirement. The dual-band multi-frequency point resonance is realized without adopting an inductance-capacitance tunable vibration network and a capacitance trimming network which are regulated by a switch control word, and the working requirements of a plurality of frequency points on the dual-band are also met without regulating the capacitance value of the capacitance trimming network.
A pair of differential signals with well matched amplitude and phase can be obtained without adopting an active Balun with a common-source common-gate structure, and the effect of effectively reducing common-mode noise can be achieved.
The active quadrature mixer adopts a Gilbert structure, so that the requirements of high linearity and low noise output can be simultaneously met, and the noise performance and linearity of the radio frequency front end of the whole receiver are improved.
The invention is applicable to satellite navigation signal receivers which simultaneously (including different) receive and process multi-band multi-channel satellite navigation signals and receive and process the satellite navigation signals in a required mode in various time periods according to the requirement.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (9)
1. The four-channel multi-band satellite navigation signal receiver is characterized by comprising four independent radio frequency channels, wherein each radio frequency channel comprises a low noise amplifier, an active quadrature mixer, a first programmable gain amplifier, a second programmable gain amplifier, a first active low-pass filter, a second active low-pass filter, a first variable gain amplifier, a second variable gain amplifier, a first analog-to-digital converter, a second analog-to-digital converter, a first analog output buffer, a second analog output buffer, a first data selector, a second data selector and a frequency synthesizer;
the signal input end of the low-noise amplifier is connected with the signal receiving unit, and the signal output end of the low-noise amplifier is connected with the active quadrature mixer; the frequency synthesizer divides the frequency by a two-frequency divider and then is connected with the active quadrature mixer;
the active quadrature mixer is used for down-converting the signal amplified by the low-noise amplifier into an I signal with the phase of 0 degrees and a Q signal with the phase of 90 degrees, the frequency set by the frequency synthesizer is divided into half of working frequency signals by the two frequency dividers, the working frequency signals are mixed with the I signal frequency by the active quadrature mixer, and the working frequency signals are mixed with the Q signal frequency;
the active quadrature mixer sends the mixed I signal to the first programmable gain amplifier, the first programmable gain amplifier sends the I signal to the first variable gain amplifier through a first active low-pass filter, the first variable gain amplifier sends the I signal to a first analog output buffer and a first analog-to-digital converter respectively, the first analog output buffer and the first analog-to-digital converter send the I signal to a first data selector respectively, and the first data selector outputs the I signal;
the active quadrature mixer sends the mixed Q signal to the second programmable gain amplifier, the second programmable gain amplifier sends the Q signal to the second variable gain amplifier through a second active low-pass filter, the second variable gain amplifier sends the Q signal to a second analog output buffer and a second analog-to-digital converter respectively, the second analog output buffer and the second analog-to-digital converter send the Q signal to a second data selector respectively, and the second data selector outputs the Q signal;
the integrated frequency device of the four independent radio frequency channels receives the same reference clock signal;
each radio frequency channel comprises a digital control circuit, wherein the input end of the digital control circuit is coupled with output signals of a first variable gain amplifier and a second variable gain amplifier, and the output signals of the variable gain amplifiers are respectively sent to the first active low-pass filter, the first variable gain amplifier, the second active low-pass filter and the second variable gain amplifier after being processed.
2. The four-channel multi-band satellite navigation signal receiver of claim 1, further comprising a first dc offset correction module and a second dc offset correction module, the first dc offset correction module being in parallel with the first active low pass filter and the second dc offset correction module being in parallel with the second active low pass filter.
3. The four-channel multi-band satellite navigation signal receiver of claim 2, further comprising a third dc offset correction module and a fourth dc offset correction module, the third dc offset correction module being in parallel with the first programmable gain amplifier, the fourth dc offset correction module being in parallel with the second programmable gain amplifier.
4. The four-channel multi-band satellite navigation signal receiver of claim 2, wherein the integrated frequency divider comprises a reference clock divider, a voltage controlled oscillator, a low pass filter, a charge pump, a phase detector, an 8/9divider, a digital divider, and a divide-by-two divider;
the signal input end of the reference clock frequency divider is externally connected with a reference clock, the signal input end of the phase discriminator is respectively connected with the signal output end of the reference clock frequency divider and the signal output end of the digital frequency divider, the signal output end of the phase discriminator is connected with the signal input end of the charge pump, the charge pump is connected with the signal input end of the voltage-controlled oscillator through the low-pass filter, the signal output end of the voltage-controlled oscillator is respectively connected with the signal input ends of the frequency divider and the 8/9 frequency divider, the signal output end of the frequency divider is connected with the active quadrature mixer, and the signal output end of the 8/9 frequency divider is connected with the signal input end of the digital frequency divider;
the reference clock frequency divider is used for dividing a reference clock signal into preset frequency signals and outputting the frequency signals to the phase discriminator, and the phase discriminator drives the charge pump to generate voltage signals according to the phase differences of signals after the input reference clock frequency dividing signals and the voltage-controlled oscillator output signals pass through the 8/9 frequency divider and the digital frequency divider, and the voltage signals are filtered by the low-pass filter and then drive the voltage-controlled oscillator to oscillate, so that the oscillator finally oscillates at preset working frequency; the preset working frequency is output to the corresponding radio frequency channel after being divided by two frequency dividers.
5. The four-channel multi-band satellite navigation signal receiver of claim 4, wherein the low noise amplifier supports frequency points of 1.1GHZ to 1.7GHZ, and wherein the low noise amplifier is configured to amplify a single-ended signal input from the signal receiving unit and convert the single-ended signal into a differential signal.
6. The four-channel multi-band satellite navigation signal receiver of claim 4, wherein the active quadrature mixer includes a quadrature active down-converter for down-converting and signal amplifying signals received from the low noise amplifier.
7. The four-channel multi-band satellite navigation signal receiver of claim 4, wherein the active low pass filter is a chebyshev type low pass filter for filtering the low intermediate frequency signal output from the programmable gain amplifier.
8. The four-channel multi-band satellite navigation signal receiver of claim 4, wherein the frequency synthesizer is an integer divide, wherein the first channel and the fourth channel each comprise two voltage controlled oscillators each operable near 2.4GHz and 3.0GHz, each channel being configured by software to support two operating frequency band selections of 1.2GHz and 1.5GHz, the second channel and the third channel each comprise one voltage controlled oscillator operable in the 2.4GHz band, each channel being configured by software to support both the 1.2GHz and the operating frequency band.
9. The four-channel multi-band satellite navigation signal receiver of claim 8, wherein each of the four independent radio frequency channels is configured in a low intermediate frequency mode of operation, each radio frequency channel configured as follows:
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| CN201810818448.2A CN108872925B (en) | 2018-07-24 | 2018-07-24 | Four-channel multi-frequency-band satellite navigation signal receiver |
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| CN109525306B (en) * | 2019-01-08 | 2024-05-24 | 国家广播电视总局二0二二台 | Multi-band analog satellite transponder |
| CN109828240B (en) * | 2019-03-21 | 2024-07-02 | 中国电子科技集团公司第三十八研究所 | Analog baseband circuit and 77GHz automobile radar |
| CN110244327A (en) * | 2019-07-04 | 2019-09-17 | 广东工业大学 | A kind of satellite positioning receiver and its radio-frequency front-end |
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| CN110971252A (en) * | 2019-12-06 | 2020-04-07 | 北京自动化控制设备研究所 | Satellite navigation radio frequency front-end circuit and clock circuit |
| CN111766505B (en) * | 2020-06-30 | 2023-04-25 | 山东云海国创云计算装备产业创新中心有限公司 | Scanning test device of integrated circuit |
| CN111884666A (en) * | 2020-07-07 | 2020-11-03 | 西安欣创电子技术有限公司 | Multi-mode multi-channel radio frequency receiver chip adopting phase-locked loop multiplexing |
| CN112398777B (en) * | 2020-10-21 | 2023-02-03 | 中交航信（上海）科技有限公司 | Very high frequency data exchange system |
| CN114640371B (en) * | 2020-12-16 | 2023-05-05 | Oppo广东移动通信有限公司 | Radio frequency receiving and transmitting system and communication equipment |
| CN115296680B (en) * | 2022-10-08 | 2023-02-10 | 深圳捷扬微电子有限公司 | Radio frequency receiver circuit applied to ultra-wideband |
| CN115629396A (en) * | 2022-10-09 | 2023-01-20 | 中国科学院国家空间科学中心 | Numerical control attenuation radio frequency front-end equipment of all-civil navigation frequency band |
| CN117607924B (en) * | 2023-12-07 | 2024-04-02 | 北京凯芯微科技有限公司 | Satellite positioning system receiving circuit, chip and receiver |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009093172A1 (en) * | 2008-01-25 | 2009-07-30 | Nxp B.V. | Improvements in or relating to radio receivers |
| CN102096079A (en) * | 2009-12-12 | 2011-06-15 | 杭州中科微电子有限公司 | Method for constructing radio frequency front end of multi-mode multi-band satellite navigation receiver and module thereof |
| CN105549038A (en) * | 2015-07-10 | 2016-05-04 | 北京中电华大电子设计有限责任公司 | Radio frequency front-end circuit of L1-L2 dual-band satellite navigation receiver |
| WO2017137878A1 (en) * | 2016-02-05 | 2017-08-17 | ЧЕРНЯКОВСКИЙ, Николай | Multi-channel multi-system radio frequency unit of a satellite navigation receiver |
| CN107942355A (en) * | 2017-11-08 | 2018-04-20 | 重庆西南集成电路设计有限责任公司 | A kind of parallel GNSS radio-frequency transmitters of four mould triple channels |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9766347B2 (en) * | 2014-10-09 | 2017-09-19 | Stmicroelectronics S.R.L. | Receiver for receiving a plurality of GNSS (Global Navigation Satellite System) signals |
-
2018
- 2018-07-24 CN CN201810818448.2A patent/CN108872925B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009093172A1 (en) * | 2008-01-25 | 2009-07-30 | Nxp B.V. | Improvements in or relating to radio receivers |
| CN102096079A (en) * | 2009-12-12 | 2011-06-15 | 杭州中科微电子有限公司 | Method for constructing radio frequency front end of multi-mode multi-band satellite navigation receiver and module thereof |
| CN105549038A (en) * | 2015-07-10 | 2016-05-04 | 北京中电华大电子设计有限责任公司 | Radio frequency front-end circuit of L1-L2 dual-band satellite navigation receiver |
| WO2017137878A1 (en) * | 2016-02-05 | 2017-08-17 | ЧЕРНЯКОВСКИЙ, Николай | Multi-channel multi-system radio frequency unit of a satellite navigation receiver |
| CN107942355A (en) * | 2017-11-08 | 2018-04-20 | 重庆西南集成电路设计有限责任公司 | A kind of parallel GNSS radio-frequency transmitters of four mould triple channels |
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