CN116683930A - Radio frequency transceiver and system, terminal, base station and radio frequency signal clutter suppression method - Google Patents

Abstract

The application discloses a radio frequency transceiver, a system, a terminal, a base station and a radio frequency signal clutter suppression method, wherein the radio frequency transceiver comprises the following components: the single-pole double-throw switch is used for switching the paths of the power coupling signals input by the coupler, and switching the radio frequency power control unit or the clutter determination unit to be conducted; the radio frequency power control unit is used for monitoring the size of a power coupling signal input by the coupler; the clutter determination unit is used for detecting whether clutter exists in the power coupling signal input by the coupler; and the adjustable device control unit is used for carrying out self-adaptive filtering processing on the clutter if the clutter determination unit determines that the clutter exists and exceeds a preset threshold value. The clutter determination unit is added in the original radio frequency transceiver, and can directly determine whether the clutter signal exists in the power coupling signal at the output end of the coupler or not, and perform adaptive filtering processing on the corresponding clutter signal under the condition that the clutter signal exists, so that the clutter processing efficiency is improved.

Description

Radio frequency transceiver and system, terminal, base station and radio frequency signal clutter suppression method

Technical Field

The present application relates to the field of communications technologies, and in particular, to a radio frequency transceiver, a system, a terminal, a base station, and a method for suppressing noise of radio frequency signals.

Background

Currently, communication systems, particularly wireless communication systems, are becoming more and more popular, which causes many signals of different communication systems to interfere with each other, and thus the strength of unwanted signals of the wireless communication systems needs to be limited. Common unwanted signals are spurs and harmonics of the communication system, which in themselves do not contribute to the communication but interfere with other communication systems.

In the prior art, an adjustable filter exists, and the resonant frequency point of the LC network can be changed by adjusting the parameter value of the capacitor (C) or the inductor (L), so that the filtering frequency point of the LC network is controlled. However, in the prior art, the judgment of the clutter signals is complex, the clutter signals are generally tested by means of complex meters, the operation is complex, and the adaptive filtering of the clutter signals cannot be realized.

Disclosure of Invention

In view of the foregoing drawbacks and deficiencies of the prior art, it is desirable to provide a radio frequency transceiver and system, terminal, base station and method of clutter suppression of radio frequency signals.

In a first aspect, an embodiment of the present application provides a radio frequency transceiver, including: the device comprises a radio frequency power control unit, a clutter determination unit, a single-pole double-throw switch and an adjustable device control unit; wherein,,

the single-pole double-throw switch is used for switching the paths of power coupling signals input by the coupler and switching the radio frequency power control unit or the clutter determination unit to be conducted;

the radio frequency power control unit is used for monitoring the power coupling signal input by the coupler;

the clutter determination unit is used for detecting whether clutter exists in the power coupling signal input by the coupler;

and the adjustable device control unit is used for controlling the adjustable filter to perform self-adaptive filtering processing on the clutter if the clutter determination unit determines that the clutter exists and exceeds a preset threshold value.

In some embodiments, the clutter determination unit comprises: a first power amplifier, a mixer, a local oscillator, a low pass filter and an amplitude determiner; wherein,,

the first power amplifier is used for amplifying the power coupling signal input by the coupler to obtain an amplified radio frequency signal;

the mixer is used for carrying out mixing processing on the radio frequency signal amplified by the first power amplifier;

The local oscillator is used for generating an oscillation signal and injecting the oscillation signal into the mixer, and demodulating the amplified radio frequency signal to obtain a mixed signal;

the low-pass filter is used for filtering high-frequency signals in the mixed signals to obtain direct-current signals;

the amplitude determiner is configured to determine whether the dc signal exceeds a preset threshold.

In a second aspect, an embodiment of the present application provides a radio frequency transceiver system, where the radio frequency transceiver system includes a radio frequency transceiver, a second power amplifier, a first radio frequency switch, at least one radio frequency filter, a second radio frequency switch, a coupler, at least one tunable filter, a test socket, and an antenna provided in any embodiment of the present application; wherein,,

the signal transmitting end of the radio frequency transceiver is connected with the first end of the second power amplifier, the second end of the second power amplifier is connected with the first end of the first radio frequency switch, at least one second end of the first radio frequency switch is respectively connected with the first end of a corresponding radio frequency filter, the second end of each radio frequency filter is connected with one signal receiving end corresponding to the radio frequency transceiver, and the third end of each radio frequency filter is respectively connected with one first end corresponding to the second radio frequency switch;

The second end of the second radio frequency switch is connected with the first end of the coupler, the second end of the coupler is respectively connected with the first end of at least one adjustable filter and the first end of the test seat, and the coupling end of the coupler is connected with the single-pole double-throw switch;

the second end of the test seat is connected with the antenna, and the second end of the adjustable filter is connected with the control end in the clutter judging unit.

In some embodiments, the tunable filter comprises: inductance and capacitance; the first end of the inductor is connected with the coupler and the test seat, the second end of the inductor is connected with the first end of the capacitor, and the second end of the capacitor is grounded; and parameter adjusting ends of the inductor and the capacitor are respectively connected with a control end in the clutter judging unit.

In a third aspect, an embodiment of the present application provides a terminal, where the terminal includes a radio frequency transceiver provided by any embodiment of the present application, or includes a radio frequency transceiver system provided by any embodiment of the present application.

In a fourth aspect, an embodiment of the present application provides a base station, where the base station includes a radio frequency transceiver provided by any embodiment of the present application, or includes a radio frequency transceiver system provided by any embodiment of the present application.

In a fifth aspect, an embodiment of the present application provides a method for suppressing radio frequency signal clutter, where the radio frequency transceiver provided by any embodiment of the present application or the radio frequency transceiver system provided by any embodiment of the present application is based on the radio frequency transceiver system, and the method for suppressing radio frequency signal clutter includes:

when the radio frequency transceiver transmits radio frequency signals, the clutter judging unit judges clutter signals in the radio frequency signals in real time;

and if clutter signals exist in the radio frequency signals and the clutter signals exceed a preset threshold value, carrying out self-adaptive filtering processing on the clutter signals.

In some embodiments, the adaptively filtering the clutter signals includes:

and selecting a group of capacitance value and inductance value combination which can realize the maximum suppression of the clutter signals from all possible value combinations of capacitance values and inductance values, and adopting the group of capacitance value and inductance value combination to filter the clutter signals.

In some embodiments, the radio frequency signal clutter suppression method further comprises:

and pre-calibrating the clutter signals, and combining the inductance value and the capacitance value corresponding to each clutter frequency point with the maximum inhibition degree into a table and storing the table into a register.

In some embodiments, the pre-calibrating the clutter signals, and combining the inductance value and the capacitance value corresponding to the maximum suppression degree of each clutter frequency point into a table and storing the table into a register, includes:

scanning each frequency point needing clutter suppression on any channel once to obtain a list of each frequency point needing clutter suppression;

fixing the capacitance value, scanning all adjustable inductance values to obtain clutter amplitudes corresponding to different inductance values under the fixed capacitance value, changing the capacitance value by one step, and scanning all the adjustable inductance values again under the new capacitance value to obtain clutter amplitudes corresponding to different inductances under the new capacitance value; or fixing the inductance value, scanning all adjustable capacitance values to obtain clutter amplitudes corresponding to different capacitance values under the fixed inductance value, changing the inductance value by one step, and scanning all the adjustable capacitance values again under the new inductance value to obtain clutter amplitudes corresponding to different capacitance values under the new inductance value;

repeating the steps, traversing the corresponding clutter amplitudes under all adjustable capacitance values and adjustable inductance value combinations, combining the inductance value and the capacitance value corresponding to the maximum inhibition degree of a certain clutter frequency point as the inductance value and the capacitance value required by filtering the clutter frequency point corresponding to the channel, and making the clutter frequency point, the corresponding inductance value and the corresponding capacitance value into a table in a one-to-one correspondence manner and storing the table in a register;

And replacing the channels, repeating the steps to obtain the inductance value and the capacitance value corresponding to each clutter frequency point corresponding to all the channels, and preparing the inductance value and the capacitance value corresponding to all the clutter frequency points corresponding to all the channels into a table in a one-to-one correspondence manner and storing the table in a register.

In some embodiments, the radio frequency signal clutter suppression method further comprises:

if the clutter signals exceed a preset threshold, determining whether frequency points corresponding to the clutter signals are in the frequency points stored in the register, and if yes, calling a capacitance value and inductance value combination corresponding to the frequency points in the register to adjust the adjustable filter.

According to the radio frequency transceiver, the system, the terminal, the base station and the radio frequency signal clutter suppression method provided by the embodiment of the application, the radio frequency transceiver is simple in structure, the clutter judgment unit and the single-pole double-throw switch are added in the original radio frequency transceiver, when the second movable contact of the single-pole double-throw switch is contacted with the fixed contact, a power coupling signal at the output end of the coupler enters the clutter judgment unit, whether the clutter signal exists in the power coupling signal at the output end of the coupler can be directly judged by the clutter judgment unit, and under the condition that the clutter signal exists, the clutter signal in the radio frequency signal transmitted by the radio frequency transceiver is subjected to self-adaptive filtering processing, and clutter test is not needed by means of a complex instrument, so that the clutter processing efficiency is improved.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:

fig. 1 is an exemplary block diagram of a radio frequency transceiver according to an embodiment of the present application;

fig. 2 is an exemplary block diagram of a radio frequency transceiver system according to an embodiment of the present application;

FIG. 3 is a flowchart illustrating an exemplary method for clutter suppression of RF signals according to an embodiment of the present application;

FIG. 4 is another exemplary flowchart of a method for clutter suppression of RF signals according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

In fig. 1-2 above:

a 100 radio frequency transceiver; 110 radio frequency power control unit; a 120 clutter determination unit; 121 a first power amplifier; 122 a mixer; a 123 local oscillator; 124 low pass filter; a 125 amplitude determiner; 130 single pole double throw switch; 140 an adjustable device control unit;

200 radio frequency transceiver systems; 210 a second power amplifier; 220 a first radio frequency switch; 230 a radio frequency filter; a second radio frequency switch 240; 250 a coupler; 260 a tunable filter; 261 inductance; 262 capacitance; 270 test seats; 280 antenna.

Detailed Description

The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the application are shown in the drawings.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

In the existing communication system, the harmonic wave and the clutter are generally reduced by adopting a mode of filtering and improving the linearity of a transmitter, but the generation of the harmonic wave and the clutter still cannot be avoided. There is also an adjustable filter, and the resonant frequency point of the LC network is changed by adjusting the parameter value of the capacitor or the inductor, so as to control the filtering frequency point of the LC network, but a simple clutter detection device is absent, so that the adaptive filtering of the harmonic wave and the clutter cannot be realized through the system of the terminal itself.

In order to solve the above technical problems, referring to the radio frequency transceiver 100 shown in fig. 1, an embodiment of the present application provides a radio frequency transceiver 100, including:

A radio frequency power control unit 110, a clutter determination unit 120, a single pole double throw switch 130 and an adjustable device control unit 140; wherein,,

the single pole double throw switch 130 is configured to switch the path of the power coupling signal input by the coupler 250, and switch the rf power control unit 110 or the clutter determination unit 120 to be turned on;

the rf power control unit 110 is configured to monitor the power coupling signal input by the coupler 250;

the clutter determination unit 120 is configured to detect whether a clutter exists in the power coupling signal input to the coupler 250;

the tunable device control unit 140 is configured to control the tunable filter to perform adaptive filtering processing on the clutter if the clutter determination unit 120 determines that the clutter exists and exceeds a preset threshold.

Specifically, as shown in fig. 1, a stationary contact of a single pole double throw switch 130 (SPDT switch) is connected to a coupling end of a coupler 250, a first movable contact of the single pole double throw switch 130 is connected to a radio frequency power control unit 110, and a second movable contact of the single pole double throw switch 130 is connected to a clutter determination unit 120. When the first movable contact of the single pole double throw switch 130 contacts the stationary contact, the rf power control unit 110 is turned on and starts to operate; when the second movable contact of the single pole double throw switch 130 contacts the stationary contact, the spur determination unit 120 is turned on and starts to operate.

The rf power control unit 110 is configured to detect the magnitude of the power coupling signal output from the coupling end by the coupler 250, and determine whether the power of the rf signal transmitted by the rf transceiver 100 is increased or decreased according to the detected magnitude of the power coupling signal output from the coupling end, so that the power coupling signal of the rf signal passing through the output end of the coupler 250 reaches the power (may be the preset power) required for clutter signal detection. When the rf power control unit 110 controls the power of the rf signal transmitted by the rf transceiver 100 to increase, the power of the power coupling signal at the output end of the corresponding coupler 250 also increases; when the rf power control unit 110 controls the power of the rf signal transmitted by the rf transceiver 100 to decrease, the power of the power coupling signal at the output of the corresponding coupler 250 also decreases.

The clutter determination unit 120 continuously performs clutter determination on the power coupling signal output by the coupling end of the coupler 250 while the radio frequency transceiver 100 performs radio frequency signal transmission, and determines whether the power coupling signal output by the coupling end has clutter. The coupler 250 couples a portion of the rf signal transmitted by the rf transmitter 100 (outputs a power coupled signal from the coupling end), and the coupled energy is typically used for detection or monitoring of spurious signals; in the clutter determination, the power coupling signal output from the coupling end of the coupler 250 is adjusted by the rf power control unit 110 to achieve the power required for clutter signal detection.

The adjustable device control unit 140, if the clutter determination unit 120 determines that the power coupling signal output by the coupling end of the coupler 250 has clutter and exceeds the preset threshold, and when the power coupling signal output by the coupling end has clutter and exceeds the preset threshold, indicates that the clutter signal in the radio frequency signal transmitted by the radio frequency transceiver exceeds the standard, it needs to perform adaptive filtering processing on a frequency point corresponding to the clutter in the radio frequency signal transmitted by the radio frequency transceiver 100. The tunable device control unit 140 adjusts the resonance frequency point of the tunable filter 260, and performs adaptive filtering processing on the clutter signals to suppress the clutter signals to the minimum.

The radio frequency transceiver 100 provided in the embodiment of the present application has a simple structure, by adding the clutter determination unit 120 and the single-pole double-throw switch 130 in the original radio frequency transceiver 100, when the second movable contact of the single-pole double-throw switch 130 contacts the stationary contact, the power coupling signal at the output end of the coupler 250 enters the clutter determination unit 120, and by the clutter determination unit 120, it can be directly determined whether the power coupling signal at the output end of the coupler 250 has a clutter signal, and in the case that the clutter signal exists, the clutter signal in the radio frequency signal transmitted by the radio frequency transceiver 100 is adaptively filtered, so that the clutter test is not performed by means of a complex instrument, and the clutter processing efficiency is improved.

In some embodiments, as shown in fig. 1, the clutter determination unit 120 includes: a first power amplifier 121, a mixer 122, a local oscillator 123, a low pass filter 124 and an amplitude determiner 125; wherein,,

the first power amplifier 121 is configured to amplify the power coupled signal input by the coupler 250 to obtain an amplified radio frequency signal;

the mixer 122 is configured to mix the radio frequency signal amplified by the first power amplifier 121;

the local oscillator 123 is configured to generate an oscillation signal and inject the oscillation signal into the mixer 122, and demodulate the amplified radio frequency signal to obtain a mixed signal;

the low-pass filter 124 is configured to filter the high-frequency signal in the mixed signal to obtain a direct current signal;

the amplitude determiner 125 is configured to determine whether the dc signal exceeds a preset threshold.

Specifically, clutter determination unit 120 includes: a first power amplifier 121, a mixer 122, a local oscillator 123, a low pass filter 124 and an amplitude determiner 125. The second movable contact of the single pole double throw switch 130 is connected to one end of a first power amplifier 121 in the clutter determination unit 120, the other end of the first power amplifier 121 is connected to a mixer 122, a low pass filter 124 and an amplitude determiner 125 in this order, and a local oscillator 123 is connected to the mixer 122.

The power coupled signal output from the coupling end of the coupler 250 is input to the clutter determination unit 120, and the first power amplifier 121 (PA) amplifies the power coupled signal input from the coupler 250 to obtain an amplified radio frequency signal. The mixer 122 (e.g. multiplier) receives the oscillation signal generated by the local oscillator 123, and both together demodulate the radio frequency signal amplified by the first power amplifier 121 to obtain a mixed signal. The low-pass filter 124 filters out the high-frequency signal in the mixed signal output from the mixer 122, retains the low-frequency signal, and acquires the direct-current signal in the low-frequency signal. The amplitude determiner 125 determines the intensity of the dc signal, and determines whether the intensity of the dc signal exceeds a preset threshold, which is a dc level threshold. When the dc signal detected by the amplitude determiner 125 in real time exceeds the preset threshold, the adjustable device control unit 140 adjusts the resonance frequency point of the adjustable filter 260, and the adjustable device control unit 140 performs adaptive filtering processing on the frequency point corresponding to the clutter signal by controlling the parameter (capacitance value or/and inductance value) of the adjustable filter 260.

In the prior art, a comparison mode is generally adopted to obtain the difference between the amplified signal and the main signal so as to obtain whether a clutter signal exists. In the embodiment of the present application, since the rf signal sent out by the rf transceiver 100 has harmonics, if the frequency spectrum of the signal amplified by the PA is subtracted in some way, the detected harmonic signal is smaller than the actual value of the harmonics (some harmonics are subtracted after the subtraction), so that the power coupling signal output by the coupler 250 needs to be specially detected by adopting the direct detection method provided by the embodiment of the present application, so that the dc level of all the corresponding clutter signals is obtained with higher accuracy.

It should be noted that, there is a corresponding relation between the preset threshold and the corresponding clutter size. When the detected clutter is adBm, the corresponding clutter signal passes through the low-pass filter 124, and the DC level is bmV, if the clutter limit is adBm, the corresponding bmV is the preset threshold of clutter detection after the clutter signal passes through the low-pass filter 124, and the preset threshold is changed according to the intensity of the clutter level in each system.

In a second aspect, as shown in fig. 2, an embodiment of the present application provides a radio frequency transceiver system 200, where the radio frequency transceiver system 200 includes a radio frequency transceiver 100, a second power amplifier 210, a first radio frequency switch 220, at least one radio frequency filter 230, a second radio frequency switch 240, a coupler 250, at least one tunable filter 260, a test socket 270, and an antenna 280 provided in any embodiment of the present application; wherein,,

the signal transmitting end of the rf transceiver 100 is connected to the first end of the second power amplifier 210, the second end of the second power amplifier 210 is connected to the first end of the first rf switch 220, at least one second end of the first rf switch 220 is respectively connected to the first end of a corresponding rf filter 230, the second end of each rf filter 230 is connected to a signal receiving end corresponding to the rf transceiver 100, and the third end of each rf filter 230 is respectively connected to a first end corresponding to the second rf switch 240;

A second end of the second rf switch 240 is connected to a first end of the coupler 250, the second end of the coupler 250 is connected to a first end of at least one of the tunable filters 260 and a first end of the test socket 270, and a coupling end of the coupler 250 is connected to the single pole double throw switch 130;

a second end of the test socket 270 is connected to the antenna 280, and a second end of the tunable filter 260 is connected to a control end of the clutter determination unit 120.

The radio frequency transceiver system 200 provided in the embodiment of the present application includes the radio frequency transceiver 100 provided in any embodiment, by adding the clutter determination unit 120 in the original radio frequency transceiver 100, the clutter determination unit 120 can directly determine whether the clutter signal exists in the power coupling signal at the output end of the coupler 250, and in the case that the clutter signal exists, perform adaptive filtering processing on the clutter signal in the radio frequency signal transmitted by the radio frequency transceiver 100, without using a complex instrument to perform clutter test, thereby improving the clutter processing efficiency.

The radio frequency transceiver system 200 comprises: the radio frequency transceiver 100, the second power amplifier 210, the first radio frequency switch 220, the at least one radio frequency filter 230, the second radio frequency switch 240, the coupler 250, the at least one tunable filter 260, the test socket 270, and the antenna 280. Wherein the radio frequency transceiver 100 has a signal transmitting end and at least one signal receiving end; the first radio frequency switch 220 has a first end (stationary contact) and at least one second end (movable contact); the second radio frequency switch 240 has at least a first end and a second end. Wherein the number of rf filters 230, the number of signal receiving ends of the rf transceiver 100, the number of second ends of the first rf switch 220, and the number of first ends of the second rf switch 240 are the same, respectively. The frequency band and the number of the radio frequency transceiver 100 are not particularly limited in the embodiment of the present application, and may be set arbitrarily by those skilled in the art according to actual requirements. The radio frequency transceiver 100 provided by the embodiment of the application can cover the frequency band 617MHZ-6G.

Illustratively, when the number of rf transceivers 100 is four, as shown in fig. 2, there are a first rf transceiver, a second rf transceiver, a third rf transceiver, and a fourth rf transceiver, respectively. If the frequency Band of the first radio frequency transceiver is Band1, the frequency Band of the second radio frequency transceiver is Band3, the frequency Band of the first radio frequency transceiver is Band7, and the frequency Band of the first radio frequency transceiver is Band41.

The signal transmitting terminal (tx_mhb) of the radio frequency transceiver 100 is connected to the first terminal of the second power amplifier 210, the second terminal of the second power amplifier 210 is connected to the first terminal of the first radio frequency switch 220, the second terminal (Band 1 Tx) of the first radio frequency switch 220 is connected to the first terminal of the first radio frequency transceiver, the second terminal (Band 3 Tx) of the first radio frequency switch 220 is connected to the first terminal of the second radio frequency transceiver, the second terminal (Band 7 Tx) of the first radio frequency switch 220 is connected to the first terminal of the third radio frequency transceiver, and the second terminal (Band 41 Tx) of the first radio frequency switch 220 is connected to the first terminal of the fourth radio frequency transceiver.

The second end of the first radio frequency transceiver is connected to the signal receiving end (Band 1 Rx) of the radio frequency transceiver 100; a second end of the second rf transceiver is connected to a signal receiving end (Band 3 Rx) of the rf transceiver 100; the second end of the third rf transceiver is connected to the signal receiving end (Band 7 Rx) of the rf transceiver 100; the second terminal of the fourth rf transceiver is connected to the signal receiving terminal (Band 41 Rx) of the rf transceiver 100.

The third terminal of the first rf transceiver is connected to the first terminal (Band 1) of the second rf switch 240, the third terminal of the second rf transceiver is connected to the first terminal (Band 3) of the second rf switch 240, the third terminal of the third rf transceiver is connected to the first terminal (Band 7) of the second rf switch 240, and the third terminal of the fourth rf transceiver is connected to the first terminal (Band 41) of the second rf switch 240.

A second end of the second rf switch 240 is connected to a first end of the coupler 250, a second end of the coupler 250 is connected to a first end of the at least one tunable filter 260 and a first end of the test socket 270, and a coupling end (Coupler Feedback Rx) of the coupler 250 is connected to a stationary contact of the single pole double throw switch 130; a second end of the test socket 270 is connected to the antenna 280, and a second end of the tunable filter 260 is connected to a control end (i.e., to a capacitance control end and an inductance control end of the tunable control unit) in the clutter determination unit 120.

The number of the tunable filters 260 is not particularly limited in the embodiment of the present application, and those skilled in the art may set the number of the tunable filters 260 according to actual needs, for example, the number of the tunable filters 260 may be 1, 2 or 5. When the number of the adjustable filters 260 is plural, that is, the radio frequency transceiver system 200 has plural sets of combinations of adjustable capacitance values and inductance values for suppressing the corresponding clutter signal frequency points, the radio frequency transceiver system 200 can simultaneously suppress the clutter signal frequency points.

The signal transmitting end of the radio frequency transceiver 100 transmits a radio frequency signal (tx_mhb). Each signal receiving end of the rf transceiver 100 is configured to receive the rf signal sent by the corresponding rf filter 230.

The second power amplifier 210 is configured to amplify the radio frequency signal sent by the radio frequency transceiver 100, so as to obtain an amplified radio frequency signal.

The first rf switch 220 is configured to switch the rf signal path to implement switching of different frequency bands, as shown in fig. 2, when the stationary contact of the first rf switch 220 is connected to the moving contact corresponding to the first rf filter 230, the channel where the first rf filter 230 is located is turned on, and the first rf filter 230 starts to operate.

The rf filter 230 may be an rf duplexer for filtering out signals outside of the useful bandwidth in the communication system. For example, the rf filter 230 may perform filtering processing on the rf signal amplified by the second power amplifier 210 to obtain an rf signal in a desired frequency band. As shown in fig. 2, radio frequency signals of four desired frequency bands can be obtained.

A second rf switch 240 for combining the multiple rf signals into one path and providing the signal to an antenna 280. As shown in fig. 2, the radio frequency signals of four required frequency bands are combined together and transmitted through an antenna 280.

The coupler 250 is configured to sample the magnitude of at least one path of rf signal, monitor the intensity of the rf signal, and when the intensity of the rf signal reaches a required intensity, the clutter determination unit 120 performs clutter detection and determination on the power coupled signal output from the coupling end of the coupler 250.

The tunable filter 260 is configured to adjust the capacitance value and the inductance value, so that the corresponding combination of the inductance value and the resistance value can maximally suppress the corresponding noise wave and the corresponding harmonic wave.

The test socket 270 is used for detecting the radio frequency signal in a conductive manner. An antenna 280 for transmitting radio frequency signals.

In some embodiments, as shown in fig. 2, the tunable filter 260 includes: an inductance 261 and a capacitance 262; wherein a first end of the inductor 261 is connected to the coupler 250 and the test socket 270, a second end of the inductor 261 is connected to a first end of the capacitor 262, and a second end of the capacitor 262 is grounded; the parameter adjusting terminals of the inductor 261 and the capacitor 262 are respectively connected with the control terminal in the clutter determining unit 120.

Specifically, the adjustable filter 260 is an LC network composed of an adjustable capacitor 262 and an adjustable inductor 261, a capacitance control end of the adjustable device control unit 140 is connected with a parameter adjustment end of the capacitor 262, an inductance control end of the adjustable device control unit 140 is connected with a parameter adjustment end of the inductor 261, the inductor 261 and the capacitor 262 are connected in series, one end of the inductor 261 far from the capacitor 262 is connected with the coupler 250 and the test seat 270, and one end of the capacitor 262 far from the inductor 261 is grounded. The adjustable device control unit 140 determines which combination can suppress the current clutter to the minimum (the clutter of the corresponding frequency band detected by the clutter determination unit 120 is smaller) and the main signal is suppressed less (the signal detected by the radio frequency power control unit 110 is larger) by adjusting all possible combinations of the capacitance value and the inductance value, and selects the combination of the inductance value and the capacitance value corresponding to the filter network to perform clutter signal filtering processing.

By adopting the radio frequency transceiver system 200 provided by the embodiment of the application, the clutter determination unit 120 is added in the original radio frequency transceiver 100, and after the power coupling signal output by the coupling end of the coupler 250 is amplified by the first power amplifier 121 in the clutter determination unit 120, the frequency mixing is performed by the mixer 122, and the local oscillator 123 can demodulate signals in different frequency bands through the frequency change. When the frequency of the local oscillator 123 is greater than or less than the current operating frequency band, the presence or absence of noise in the corresponding frequency band can be scanned. For example, if the frequency range of the local oscillator 123 is 0.1-6GHz, then a spurious signal of 0.1-6GHz may be detected, and when the dc level of the spurious signal after passing through the low-pass filter 124 is greater than the threshold set by the detection, which indicates that the spurious signal exceeds the expected value, the tunable device control unit 140 needs to be started to adjust the resonance frequency of the tunable filter 260, so as to filter the corresponding spurious signal. The radio frequency receiving and transmitting system 200 provided by the embodiment of the application can realize the self-adaptive detection of clutter and harmonic waves and the self-adaptive filtering of the clutter and the harmonic waves, and has simple system structure and easy operation and implementation.

In a third aspect, an embodiment of the present application provides a terminal, where the terminal includes the radio frequency transceiver 100 provided in any embodiment of the present application, or includes the radio frequency transceiver system 200 provided in any embodiment of the present application.

In particular, the terminal may be, but is not limited to, various personal computers, notebook computers, smart phones and tablet computers. By means of the radio frequency transceiver 100 arranged at the terminal, detection of clutter and harmonic waves can be performed adaptively, adaptive suppression of clutter and harmonic waves is achieved, and clutter and harmonic waves are suppressed to a low level.

In a fourth aspect, embodiments of the present application provide a base station that includes the radio frequency transceiver 100 provided by any embodiment of the present application, or includes the radio frequency transceiver system 200 provided by any embodiment of the present application.

Specifically, the base stations may be, but are not limited to, 2G, 3G, 4G, and 5G base stations. By the radio frequency transceiver 100 arranged at the base station, the detection of the clutter and the harmonic wave can be performed in a self-adaptive manner, so that the self-adaptive suppression of the clutter and the harmonic wave is realized, and the clutter and the harmonic wave are suppressed to a lower level. By adding the radio frequency transceiver 100 or the radio frequency transceiver system 200 provided by any embodiment of the present application at the base station side or/and the terminal side, the clutter signals are suppressed to a lower level by the clutter coordination mechanism of the terminal and the base station.

In a fifth aspect, as shown in fig. 3, an embodiment of the present application provides a method 300 for suppressing radio frequency signal clutter, where the method 300 for suppressing radio frequency signal clutter includes:

s310: when the radio frequency transceiver 100 transmits radio frequency signals, the clutter determination unit 120 determines clutter signals in the radio frequency signals in real time;

s320: and if clutter signals exist in the radio frequency signals and the clutter signals exceed a preset threshold value, carrying out self-adaptive filtering processing on the clutter signals.

Specifically, while the radio frequency transceiver 100 transmits the radio frequency signal, the clutter determination unit 120 continuously detects the clutter signal, and if the dc level of the detected clutter signal after passing through the low-pass filter 124 exceeds a preset threshold, the frequency point corresponding to the clutter signal in the radio frequency signal transmitted by the adaptive radio frequency transceiver 100 performs filtering processing, so as to suppress the clutter signal to the minimum.

In some embodiments, in step S320, the adaptively filtering the clutter signal includes:

The adjustable device control unit 140 controls to adjust all possible combinations of the capacitance value and the inductance value, selects a group of combinations of the capacitance value and the inductance value capable of realizing the maximum suppression of the clutter signal from all possible combinations of the capacitance value and the inductance value, and performs filtering processing on the clutter signal by adopting the group of combinations of the capacitance value and the inductance value.

Specifically, all possible value combinations of the inductor 261 and the capacitor 262 are adjusted, which combination can suppress the current clutter to the minimum is determined from all possible value combinations of the capacitor and the inductor, and the main radio frequency signal is suppressed less, so that the combination parameter of the capacitor and the inductor is selected to filter the corresponding clutter signal.

In some embodiments, as shown in fig. 4, the radio frequency signal clutter suppression method 300 further includes:

s330: and pre-calibrating the clutter signals, and combining the inductance value and the capacitance value corresponding to each clutter frequency point with the maximum inhibition degree into a table and storing the table into a register.

Specifically, through the calibration in advance, make the corresponding inductance value and the capacitance value combination of every clutter frequency point degree of suppression maximum into the table and store in the register, when carrying out harmonic and clutter suppression, can directly retrieve clutter and the corresponding capacitance value and inductance value combination parameter of harmonic point from the register, avoid carrying out the inefficiency problem that the verification of electric capacity 262 and inductance 261 parameter leads to repeatedly.

In some embodiments, in step S330, the pre-calibrating the clutter signals, and combining the inductance value and the capacitance value corresponding to the maximum suppression degree of each clutter frequency point into a table and storing the table in a register, includes:

s331: scanning each frequency point needing clutter suppression on any channel once to obtain a list of each frequency point needing clutter suppression;

s332: fixing the capacitance value, scanning all adjustable inductance values to obtain clutter amplitudes corresponding to different inductance values under the fixed capacitance value, changing the capacitance value by one step, and scanning all the adjustable inductance values again under the new capacitance value to obtain clutter amplitudes corresponding to different inductances 261 under the new capacitance value; or fixing the inductance value, scanning all adjustable capacitance values to obtain clutter amplitudes corresponding to different capacitance values under the fixed inductance value, changing the inductance value by one step, and scanning all the adjustable capacitance values again under the new inductance value to obtain clutter amplitudes corresponding to different capacitances 262 under the new inductance value;

s332: repeating the steps, traversing the corresponding clutter amplitudes under all adjustable capacitance values and adjustable inductance value combinations, combining the inductance value and the capacitance value corresponding to the maximum inhibition degree of a certain clutter frequency point as the inductance value and the capacitance value required by filtering the clutter frequency point corresponding to the channel, and making the clutter frequency point, the corresponding inductance value and the corresponding capacitance value into a table in a one-to-one correspondence manner and storing the table in a register;

S334: and replacing the channels, repeating the steps to obtain the inductance value and the capacitance value corresponding to each clutter frequency point corresponding to all the channels, and preparing the inductance value and the capacitance value corresponding to all the clutter frequency points corresponding to all the channels into a table in a one-to-one correspondence manner and storing the table in a register.

Specifically, the method for pre-calibrating the clutter signals comprises the following steps: and selecting one channel, scanning each frequency point on the channel, which is required to be subjected to clutter suppression, and storing all frequency points of clutter signals on the channel into a register, so that later-stage calling is facilitated. And then under the channel, fixing the capacitance value, and scanning all the inductance values to obtain clutter amplitudes corresponding to all the inductance values under the capacitance value. The capacitance value is increased or decreased by one step (the step value can be set according to actual requirements) to obtain a new capacitance value, and all inductance values are scanned again to obtain clutter amplitudes corresponding to different inductance values under the capacitance value; the step is repeated, namely, the capacitance value is increased or decreased by one step again, clutter amplitudes corresponding to different inductance values under the corresponding capacitance value are obtained again, after all the adjustable capacitance and the adjustable inductance value combinations are traversed, the capacitance value and inductance value combination with the maximum suppression degree of a certain clutter frequency point is obtained, the clutter frequency point, the corresponding capacitance value and inductance value combination are written into a register in a one-to-one correspondence mode, and the clutter frequency point, the corresponding capacitance value and inductance value combination are listed as a table, so that later calling is facilitated. And replacing the channels, repeating the steps to obtain the combination of the capacitance value and the inductance value with the maximum inhibition degree of all the impurity frequency points of all the channels, and writing the combination into a register. And writing the combination of the capacitance value and the inductance value with the highest inhibition degree corresponding to all the clutter frequencies into a table, and when the corresponding frequency points work, once a certain clutter frequency point exceeds the standard, calling the corresponding parameters for inhibiting the capacitance value and the inductance value of the clutter to achieve the effect of clutter inhibition.

In the embodiment of the application, the inductance value can be fixed, all the capacitance values are traversed, and then the inductance value is changed in a stepping mode, all the inductance values and the capacitance value combinations are traversed, so that the combination of the capacitance value and the inductance value with the maximum suppression degree of all the impurity wave frequency points of all the channels is obtained.

In some embodiments, as shown in fig. 4, the radio frequency signal clutter suppression method 300 further includes:

s340: if the clutter signal exceeds the preset threshold, determining whether a frequency point corresponding to the clutter signal is in the frequency point stored in the register, and if so, calling a capacitance value and an inductance value combination corresponding to the frequency point in the register to adjust the adjustable filter 260.

Specifically, when the clutter determination unit 120 determines that the clutter signal exceeds the preset threshold, it determines whether the corresponding clutter frequency point is within the frequency point range covered by the register, if yes, the adjustable device control unit 140 is started, the capacitance value and the inductance value corresponding to the frequency point in the register are directly invoked, and the capacitance value and the inductance value in the adjustable filter are adjusted to the capacitance value and the inductance value corresponding to the frequency point in the register to filter the clutter signal.

In a fourth aspect of the embodiment of the present application, an electronic device is provided, and an internal structure diagram of the electronic device may be shown in fig. 5. The electronic device includes a processor, a memory, a communication interface, a display screen, and an input device connected by a system bus. Wherein the processor of the electronic device is configured to provide computing and control capabilities. The memory of the electronic device includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The communication interface of the electronic device is used for conducting wired or wireless communication with an external terminal, and the wireless communication can be achieved through WIFI, an operator network, near Field Communication (NFC) or other technologies. The computer program is executed by a processor to implement a method of clutter suppression of radio frequency signals. The display screen of the electronic equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the electronic equipment can be a touch layer covered on the display screen, can also be keys, a track ball or a touch pad arranged on the shell of the electronic equipment, and can also be an external keyboard, a touch pad or a mouse and the like.

It will be appreciated by those skilled in the art that the structure shown in fig. 5 is merely a block diagram of a portion of the structure associated with the present inventive arrangements and is not limiting of the electronic device to which the present inventive arrangements are applied, and that a particular electronic device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.

In one embodiment, the rf transceiver 200 and the rf transceiver system 300 provided by the present application may be implemented as a computer program, which may be executed on an electronic device as shown in fig. 5. The memory of the electronic device may store various program modules that make up the rf transceiver 200, the rf transceiver system 300, such as the tunable device control unit shown in fig. 2, etc. The computer program of each program module causes a processor to carry out the steps of the method for suppressing clutter in radio frequency signals according to each embodiment of the application described in the present specification.

In some embodiments, an electronic device is provided that includes a memory storing a computer program and a processor that when executing the computer program performs the steps of the radio frequency signal clutter suppression method described below.

In some embodiments, there is also provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method embodiments described above.

Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, or the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as static random access memory (Static Random Access Memory, SRAM), dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (11)

1. A radio frequency transceiver, comprising: the device comprises a radio frequency power control unit (110), a clutter determination unit (120), a single-pole double-throw switch (130) and an adjustable device control unit (140); wherein,,

the single-pole double-throw switch (130) is used for switching the path of a power coupling signal input by the coupler (250), and switching the radio frequency power control unit (110) or the clutter determination unit (120) to be conducted;

The radio frequency power control unit (110) is used for monitoring the magnitude of a power coupling signal input by the coupler (250);

the clutter determination unit (120) is used for detecting whether clutter exists in the power coupling signal input by the coupler (250);

the tunable device control unit (140) is configured to control the tunable filter to perform adaptive filtering processing on the clutter if the clutter determination unit (120) determines that the clutter exists and exceeds a preset threshold.

2. The radio frequency transceiver of claim 1, characterized in that the spur determination unit (120) comprises: a first power amplifier (121), a mixer (122), a local oscillator (123), a low pass filter (124) and an amplitude determiner (125), wherein,

the first power amplifier (121) is configured to amplify the power coupling signal input by the coupler (250) to obtain an amplified radio frequency signal;

the mixer (122) is configured to mix the radio frequency signal amplified by the first power amplifier (121);

the local oscillator (123) is configured to generate an oscillation signal and inject the oscillation signal into the mixer (122), and demodulate the amplified radio frequency signal to obtain a mixed signal;

The low-pass filter (124) is used for filtering high-frequency signals in the mixed signals to obtain direct-current signals;

the amplitude determiner (125) is configured to determine whether the dc signal exceeds a preset threshold.

3. A radio frequency transceiver system, characterized in that it comprises a radio frequency transceiver (100) according to claim 1 or 2, a second power amplifier (210), a first radio frequency switch (220), at least one radio frequency filter (230), a second radio frequency switch (240), a coupler (250), at least one tunable filter (260), a test socket (270) and an antenna (280); wherein,,

the signal transmitting end of the radio frequency transceiver (100) is connected with the first end of the second power amplifier (210), the second end of the second power amplifier (210) is connected with the first end of the first radio frequency switch (220), at least one second end of the first radio frequency switch (220) is respectively connected with the first end of a corresponding radio frequency filter (230), the second end of each radio frequency filter (230) is connected with one signal receiving end corresponding to the radio frequency transceiver (100), and the third end of each radio frequency filter (230) is respectively connected with one first end corresponding to the second radio frequency switch (240);

The second end of the second radio frequency switch (240) is connected with the first end of the coupler (250), the second end of the coupler (250) is respectively connected with the first end of at least one adjustable filter (260) and the first end of the test seat (270), and the coupling end of the coupler (250) is connected with the single-pole double-throw switch (130);

the second end of the test seat (270) is connected with the antenna (280), and the second end of the adjustable filter (260) is connected with the control end in the clutter determination unit (120).

4. A radio frequency transceiver system as claimed in claim 3, characterized in that the tunable filter (260) comprises: an inductance (261) and a capacitance (262); wherein a first end of the inductor (261) is connected with the coupler (250) and the test seat (270), a second end of the inductor (261) is connected with a first end of the capacitor (262), and a second end of the capacitor (262) is grounded; and parameter adjusting ends of the inductor (261) and the capacitor (262) are respectively connected with a control end in the clutter judging unit (120).

5. A terminal comprising the radio frequency transceiver of claim 1 or 2 or the radio frequency transceiver system of claim 3 or 4.

6. A base station comprising the radio frequency transceiver of claim 1 or 2 or the radio frequency transceiver system of claim 3 or 4.

7. A method for suppressing radio frequency signal clutter, wherein the method for suppressing radio frequency signal clutter is based on the radio frequency transceiver of claim 1 or 2 or on the radio frequency transceiver system of claim 3 or 4, and the method for suppressing radio frequency signal clutter comprises:

when the radio frequency transceiver transmits radio frequency signals, the clutter judging unit judges clutter signals in the radio frequency signals in real time;

and if clutter signals exist in the radio frequency signals and the clutter signals exceed a preset threshold value, carrying out self-adaptive filtering processing on the clutter signals.

8. The method of clutter suppression of radio frequency signals according to claim 7, wherein said adaptively filtering the clutter signals comprises:

the adjustable device control unit controls and adjusts all possible combinations of the capacitance value and the inductance value, selects a group of combinations of the capacitance value and the inductance value which can realize the maximum suppression of the clutter signal from all possible combinations of the capacitance value and the inductance value, and adopts the group of combinations of the capacitance value and the inductance value to carry out filtering treatment on the clutter signal.

9. The method of radio frequency signal clutter suppression according to claim 7, wherein the radio frequency signal clutter suppression method further comprises:

and pre-calibrating the clutter signals, and combining the inductance value and the capacitance value corresponding to each clutter frequency point with the maximum inhibition degree into a table and storing the table into a register.

10. The method for clutter suppression of radio frequency signals according to claim 8, wherein the pre-calibrating the clutter signals, combining the inductance value and the capacitance value corresponding to the maximum suppression degree of each clutter frequency point into a table, and storing the table in a register, comprises:

scanning each frequency point needing clutter suppression on any channel once to obtain a list of each frequency point needing clutter suppression;

fixing the capacitance value, scanning all adjustable inductance values to obtain clutter amplitudes corresponding to different inductance values under the fixed capacitance value, changing the capacitance value by one step, and scanning all the adjustable inductance values again under the new capacitance value to obtain clutter amplitudes corresponding to different inductances under the new capacitance value; or fixing the inductance value, scanning all adjustable capacitance values to obtain clutter amplitudes corresponding to different capacitance values under the fixed inductance value, changing the inductance value by one step, and scanning all the adjustable capacitance values again under the new inductance value to obtain clutter amplitudes corresponding to different capacitance values under the new inductance value;

Repeating the steps, traversing the clutter amplitudes corresponding to all adjustable capacitance values and adjustable inductance value combinations, combining the inductance value and the capacitance value corresponding to a certain clutter frequency point when the inhibition degree is maximum as the inductance value and the capacitance value required for filtering the clutter frequency point corresponding to the channel, and making the clutter frequency point, the corresponding inductance value and the corresponding capacitance value into a table in a one-to-one correspondence manner and storing the table in a register;

and replacing the channels, repeating the steps to obtain the inductance value and the capacitance value corresponding to each clutter frequency point corresponding to all the channels, and preparing the inductance value and the capacitance value corresponding to all the clutter frequency points corresponding to all the channels into a table in a one-to-one correspondence manner and storing the table in a register.

11. The method of radio frequency signal clutter suppression according to claim 10, wherein the method of radio frequency signal clutter suppression further comprises:

if the clutter signals exceed a preset threshold, determining whether frequency points corresponding to the clutter signals are in the frequency points stored in the register, and if yes, calling a capacitance value and inductance value combination corresponding to the frequency points in the register to adjust the adjustable filter.