WO2020082311A1 - Appareil et procédé d'élimination d'interférences de fréquences - Google Patents

Appareil et procédé d'élimination d'interférences de fréquences Download PDF

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Publication number
WO2020082311A1
WO2020082311A1 PCT/CN2018/111975 CN2018111975W WO2020082311A1 WO 2020082311 A1 WO2020082311 A1 WO 2020082311A1 CN 2018111975 W CN2018111975 W CN 2018111975W WO 2020082311 A1 WO2020082311 A1 WO 2020082311A1
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Prior art keywords
signal
interference frequency
frequency
interference
amplitude
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PCT/CN2018/111975
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English (en)
Chinese (zh)
Inventor
杨鑫
Original Assignee
Oppo广东移动通信有限公司
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2018/111975 priority Critical patent/WO2020082311A1/fr
Priority to CN201880097210.3A priority patent/CN112913149A/zh
Publication of WO2020082311A1 publication Critical patent/WO2020082311A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements

Definitions

  • Embodiments of the present application relate to the field of communications, and more specifically, to an apparatus and method for eliminating frequency interference.
  • GSM Global System of Mobile
  • UMTS Universal Mobile Telecommunication System
  • LTE Long Term Evolution
  • Embodiments of the present application provide an apparatus and method for eliminating frequency interference, which can reduce frequency interference in the system.
  • an apparatus for eliminating frequency interference including:
  • a processor configured to detect the target signal output by the system at the current clock to obtain the amplitude and / or phase information of the interference frequency signal carried in the target signal;
  • a signal generator for generating an initial signal based on the interference frequency
  • the signal modulator is used to modulate the initial signal according to the amplitude and / or phase information of the signal at the interference frequency based on the modulation model, and output the resulting modulated signal to the system for elimination.
  • the signal of the interference frequency carried in the signal output by a clock, wherein the modulation model is used to calculate the adjustment amount of the amplitude and / or phase of the initial signal.
  • the method of the embodiment of the present application can flexibly eliminate signals on the interference frequency.
  • the processor is specifically configured to: perform discrete Fourier transform DFT on the target signal; determine the interference frequency and the signal of the interference frequency according to the result of the DFT Amplitude and / or phase information.
  • the processor is further configured to determine the number of interference frequencies according to the bandwidth of the system and the frequency interval of adjacent channels in the system.
  • the modulation model includes a least mean square LMS algorithm.
  • the signal modulator is specifically configured to: determine whether the amplitude of the interference frequency signal exceeds a threshold; if the amplitude of the interference frequency signal exceeds the threshold, based on the According to the modulation model, the initial signal is modulated according to the signal amplitude and / or phase information of the interference frequency to obtain the modulated signal.
  • the signal modulator is further configured to: if the amplitude of the signal at the interference frequency does not exceed the preset threshold, maintain the modulated signal with the previous clock input system The modulation signal is the same.
  • the initial signal and the modulation signal are sinusoidal signals.
  • the signal generator is a DDS module.
  • the DDS module includes an NCO.
  • the system includes a digital phase locked loop, and the device is used to reduce the signal of the interference frequency carried in the input signal of the DCO in the digital phase locked loop.
  • a method for eliminating frequency interference includes: detecting a target signal output by a system at a current clock to obtain amplitude and / or phase information of a signal of an interference frequency carried in the target signal; An initial signal is generated based on the interference frequency; based on the modulation model, the initial signal is modulated according to the amplitude and / or phase information of the signal at the interference frequency, and the resulting modulated signal is output to the system to It is used to eliminate the signal of the interference frequency carried in the signal output by the next clock, wherein the modulation model is used to calculate the adjustment amount of the amplitude and / or phase of the initial signal.
  • the target signal output by the detection system to obtain the amplitude and / or phase information of the signal of the interference frequency carried in the target signal includes: performing discrete Fourier transform on the target signal Fourier transform DFT; according to the result of the DFT, determine the interference frequency and the amplitude and / or phase information of the signal of the interference frequency.
  • the method before the target signal output by the detection system, the method further includes: determining the interference frequency based on the bandwidth of the system and the frequency interval of adjacent channels in the system Quantity.
  • the modulation model includes a least mean square LMS algorithm.
  • the initial signal is modulated according to the amplitude and / or phase information of the signal at the interference frequency to obtain a modulated signal, including: determining the interference Whether the amplitude of the frequency signal exceeds the threshold; if the amplitude of the interference frequency signal exceeds the threshold, based on the modulation model, based on the amplitude and / or phase information of the interference frequency
  • the initial signal is modulated to obtain the modulated signal.
  • the method further includes: if the amplitude of the signal of the interference frequency does not exceed the preset threshold, keeping the modulation signal the same as the modulation signal of the previous clock input system .
  • the initial signal and the modulation signal are sinusoidal signals.
  • the system includes a digital phase locked loop, and the method is used to reduce the signal of the interference frequency carried in the input signal of the DCO in the digital phase locked loop.
  • an apparatus for eliminating frequency interference including a processor and a memory.
  • the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the second aspect or any possible implementation manner of the second aspect.
  • the device for eliminating frequency interference can detect the signal of the interference frequency carried in the target signal output by the system in real time, generate an initial signal based on the interference frequency, and based on the predetermined modulation model, according to the signal at the interference frequency The amplitude and / or phase of the signal modulates the initial signal, so that the modulated signal cancels the interference frequency signal carried in the target signal subsequently output by the system.
  • FIG. 1 is a schematic flowchart of a method for eliminating frequency interference according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of the DFT spectrum of the embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of an apparatus for eliminating frequency interference according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of the device of the embodiment of the present application being applied in a digital phase locked loop and having only one interference frequency.
  • FIG. 5 is a schematic diagram of the device of the embodiment of the present application applied to a digital phase-locked loop and having multiple interference frequencies.
  • GSM Global System of Mobile
  • CDMA Code Division Multiple Access
  • WCDMA Broadband Code Division Multiple Access
  • GSM Global System of Mobile
  • CDMA Code Division Multiple Access
  • WCDMA Broadband Code Division Multiple Access
  • GSM Global System of Mobile
  • CDMA Code Division Multiple Access
  • WCDMA Broadband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • LTE-A Time Division Duplex
  • NR New Radio
  • NR NR system evolution system
  • LTE on unlicensed spectrum LTE-based access to unlicensed spectrum (LTE-U) system
  • Universal Mobile Telecommunication System Universal Mobile Telecommunication System, UMTS
  • WiMAX Worldwide Interoperability for Microwave Access
  • WiMAX WiMAX
  • D2D Device to Device
  • M2M machine-to-machine
  • MTC machine type communication
  • V2V vehicle-to-vehicle
  • an embodiment of the present application proposes a method of eliminating frequency interference, which can detect the interference frequency signal carried in the target signal output by the system in real time, and based on the predetermined modulation model, the interference frequency detected according to the current clock Amplitude and / or phase of the signal on the modulation of the initial signal generated based on the interference frequency to obtain a modulated signal, so that the modulated signal is input to the system for eliminating the interference frequency carried in the signal output by the next clock Signal until the interference frequency signal reaches the acceptable range.
  • FIG. 1 is a schematic flowchart of a method for eliminating frequency interference according to an embodiment of the present application. This method can be applied to any system with frequency interference. As shown in Figure 1, the method includes:
  • the target signal output by the system at the current clock is detected to obtain the amplitude and / or phase information of the interference frequency signal carried in the target signal.
  • an initial signal is generated.
  • the initial signal is modulated according to the amplitude and / or phase information of the signal at the interference frequency, and the resulting modulated signal is output to the system for eliminating the output of the next clock The signal of the interference frequency carried in the signal.
  • the modulation model is used to calculate the adjustment of the amplitude and / or phase of the initial signal.
  • the amplitude and / or phase information of the signal with the interference frequency detected in the current clock can be used to calculate the modulation amount that the next clock needs to modulate the amplitude and / or phase of the initial signal, so that the initial signal
  • the amplitude and / or phase are modulated.
  • the modulation amount may be a weight vector, which is multiplied by the initial signal to obtain a modulation signal.
  • the output target signal detected by the current clock may carry the signal of the interference frequency in addition to the ideal output signal.
  • the target signal can be detected in real time, and the amplitude and / or phase information of the signal of the interference frequency carried in the target signal can be obtained.
  • An initial signal is generated at the same time, and the frequency of the initial signal is the interference frequency.
  • the modulation model such as the Least Mean Square (LMS) algorithm
  • LMS Least Mean Square
  • the amplitude and / or phase information of the signal at the interference frequency detected can be used to determine the amplitude and / or the initial signal generated based on the interference frequency.
  • the phase is adjusted to obtain a modulated signal.
  • the modulated signal is output to the system and combined with the input signal, so that the signal of the interference frequency carried in the signal output by the next clock can be cancelled.
  • the signal of the interference frequency carried in the signal output by the next clock may not be completely cancelled, so it still carries the signal at the interference frequency, but the amplitude and / or phase of the signal of the interference frequency carried at this time The information will change, for example, the amplitude will decrease. Therefore, similarly, the signal of the interference frequency carried in the signal output by the next clock will also be detected and used to adjust the initial signal to obtain a modulated signal, which is used to cancel the signal in the signal output by the next clock Interfering with frequency signals.
  • the amplitude and / or phase of the initial signal are adaptively adjusted according to the interference frequency signal carried in the target signal output by the previous clock, so as to increase the interference frequency in the target signal output by the next clock.
  • the signal of the signal is canceled, and eventually the signal at the interference frequency in the system is getting smaller and smaller.
  • the signal on each interference frequency may be independently eliminated.
  • the number of interference frequencies may be determined according to the system bandwidth and the frequency interval of adjacent channels in the system.
  • the number of interference frequencies to be processed is equal to the system bandwidth divided by the frequency interval of adjacent channels.
  • the frequency interval of the adjacent channel can usually be agreed in advance by the agreement.
  • the system bandwidth is 600kHz and the interval between the frequencies of the adjacent channels in the system is 200kHz, then only the signals on the first three interference frequencies can be cancelled.
  • the interference frequencies outside the system bandwidth The interference of the signal to the system is negligible.
  • the three interference frequencies to be detected are f1, f2, and f3, respectively.
  • the frequency of the initial signal is the interference frequency.
  • the amplitude and phase of the initial signal may be determined according to the amplitude and phase of the signal at the interference frequency detected in the first clock.
  • the initial signal is modulated in the subsequent clocks, but the amount of each adjustment needs to be determined according to the adjustment model and the signal of the detected interference frequency.
  • the initial signal is generated based on the current interference frequency such as f1. If the current interference source disappears, that is, the interference frequency f1 disappears, and another interference source appears, for example, the interference frequency f2, then the frequency of the initial signal is f2. If the current interference frequency f1 still exists and a new interference frequency f2 is suddenly added, two initial signals need to be generated for frequencies f1 and f2, respectively. At this time, the two interference frequencies f1 and f2 need to be processed independently by the method described above.
  • a modulation model is used to modulate the initial signal with frequency f1 to obtain a modulated signal with frequency f1
  • the modulation model is used to perform the initial signal with frequency f2 Modulate to get a modulated signal with frequency f2.
  • the method of the embodiment of the present application can flexibly eliminate signals on the interference frequency.
  • the target signal output by the system is detected to obtain the amplitude and / or phase information of the interference frequency signal carried in the target signal, including: performing a Discrete Fourier Transform (DFT) on the target signal ; According to the result of the DFT, determine the interference frequency and the amplitude and / or phase information of the signal on the interference frequency.
  • DFT Discrete Fourier Transform
  • a DFT spectrogram By performing DFT on the target signal output by the system, a DFT spectrogram can be obtained, from which the interference frequency and the amplitude and / or phase information of the signal on the interference frequency can be obtained.
  • N adj is the sampling point corresponding to the interference frequency
  • f s is the sampling frequency of the DFT
  • f adj is the interference frequency
  • the sampling point Nadj corresponding to the interference frequency can be obtained, and the frequency corresponding to the sampling point Nadj is the interference frequency.
  • the amplitude and / or phase information of the signal corresponding to the sampling point Nadj can be obtained from the DFT spectrum, that is, the amplitude and / or phase information of the signal at the interference frequency.
  • the spectrum diagram is an amplitude diagram, reflecting the amplitude information of the signals on the interference frequencies f1, f2, and f3 corresponding to the three sampling points Nadj , 2N adj, and 3N adj .
  • a phase diagram can also be obtained, which reflects the phase of the signals on the interference frequencies f1, f2, and f3, which is not shown in FIG. 2.
  • the initial signals with frequencies f1, f2, and f3 can be modulated based on the modulation model, respectively, thereby obtaining the frequencies f1, f2, and f3
  • the three modulated signals are input to the system and combined with the target signal to be output by the system at the next clock to cancel the signals at these three frequencies.
  • the initial signal is modulated according to the amplitude and / or phase information of the signal at the interference frequency to obtain a modulated signal, including: determining the amplitude of the signal at the interference frequency Whether it exceeds the threshold; if the amplitude of the signal at the interference frequency exceeds the threshold, then based on the modulation model, the initial signal is modulated according to the signal amplitude and / or phase information of the interference frequency to obtain the modulated signal.
  • the modulation signal remains the same as the modulation signal of the previous clock input system.
  • the amplitude of the interference frequency signal detected at the current clock is less than or equal to the preset threshold, it can be considered that the interference of the interference frequency signal on the target signal has been controlled within an acceptable range. Therefore, it shows that the modulation signal of the previous clock input system can control the interference frequency signal carried in the target signal to an appropriate range, then the amplitude and phase of the modulation signal generated by the current clock can be kept the same as the previous clock input system The amplitude and phase of the modulated signal are the same.
  • the initial signal is continued based on the modulation model Remodulate.
  • the threshold value can be, for example, the dotted line shown in FIG. 2.
  • the thresholds corresponding to the sampling point intervals where different interference frequencies are located may be different. The closer the interference frequency to the target signal frequency is, the larger the threshold value is, and the farther the interference frequency from the target signal frequency is, the smaller the threshold value is.
  • N adj to the sampling point for example, if the amplitude of the signal corresponding to the N adj below the dotted line, the same as with the degree of modulation of a clock signal, the initial degree of modulation of the initial signal, can be understood as follows on a clock output the modulated signal without further adjustment; if N adj corresponding signal amplitude above the broken line, the model based on the modulation signal to readjust the initial.
  • the initial signal and the modulation signal may be sinusoidal signals, for example.
  • the present application is not limited to this, the initial signal and the modulated signal may also be other types of signals, or a signal formed by superimposing multiple signals, such as Gaussian Frequency Shift Keying (GFSK), orthogonal Phase shift keying (Quadrature Phase Shift Keying, QPSK) and other modulated signals.
  • GFSK Gaussian Frequency Shift Keying
  • QPSK Quadrature Phase Shift Keying
  • the modulation signal generated in each clock is modulated based on a predetermined modulation model
  • the modulation model may be, for example, an LMS algorithm.
  • the present application is not limited to this, and the modulation model may also be any other adaptive modulation model, such as Recursively Least Squares (Recursively Least Squares, RLS), etc.
  • the initial signal generated in each clock can be modulated according to the following formula.
  • x (n) is the input vector, such as the initial signal
  • w (n) is the weight vector, which can be used to modulate the amplitude and / or phase of x (n)
  • y (n) is the actual output
  • the signal is, for example, a modulated signal, that is, a signal of the interference frequency that can actually be cancelled in the next clock
  • d (n) is a desired output signal, that is, a signal of the interference frequency that is expected to be canceled, for example, the initial signal
  • n) is the deviation, for example, it can be the signal at the detected interference frequency
  • ⁇ is the convergence factor, which is used to control the convergence speed and stability.
  • the initial signal is continuously adjusted recursively, so that each time the modulation signal input to the system can be closer to the signal at the interference frequency, so as to cancel the signal at the interference frequency as much as possible.
  • the system includes a digital phase-locked loop (Digital Phase-Locked Loop, DPLL).
  • DPLL Digital Phase-Locked Loop
  • This method is used to reduce the input signal carried by the digitally controlled oscillator (Digital-Controlled Oscillator, DCO) in the digital phase-locked loop.
  • DCO Digital-Controlled Oscillator
  • FIG. 3 is a schematic block diagram of an apparatus for eliminating frequency interference according to an embodiment of the present application.
  • the device 300 includes a processor 310, a signal generator 320, and a signal modulator 330. among them:
  • the processor 310 is configured to detect the target signal output by the system at the current clock to obtain the amplitude and / or phase information of the interference frequency signal carried in the target signal.
  • the signal generator 320 is used to generate an initial signal based on the interference frequency.
  • the signal modulator 330 is used to modulate the initial signal and output the modulated signal to the system based on the modulation model, according to the amplitude and / or phase information of the signal of the interference frequency, for eliminating the next clock output
  • the processor 310 can detect the interference frequency signal carried in the target signal output by the system in real time.
  • the signal modulator 330 modulates the initial signal generated by the signal generator 320 based on the interference frequency according to the amplitude and / or phase information of the signal at the interference frequency detected by the current clock based on a predetermined modulation model, and converts the The modulation signal is input to the system for eliminating the interference frequency signal carried in the signal output by the next clock.
  • the device can continuously adjust the amplitude and / or phase of the initial signal adaptively according to the interference frequency signal carried in the target signal output by the previous clock, so as to respond to the signal at the interference frequency in the target signal output by the next clock
  • the cancellation will eventually make the signal at the interfering frequency in the system smaller and smaller.
  • the frequency of the initial signal is the interference frequency.
  • the amplitude and phase of the initial signal can be determined according to the amplitude and phase of the signal at the interference frequency detected in the first clock.
  • the initial signal is modulated in the subsequent clocks, but the amount of each adjustment needs to be determined according to the adjustment model and the signal of the detected interference frequency.
  • the initial signal is generated based on the current interference frequency such as f1. If the current interference source disappears, that is, the interference frequency f1 disappears, and another interference source appears, for example, the interference frequency f2, then the frequency of the initial signal is f2. If the current interference frequency f1 still exists and a new interference frequency f2 is suddenly added, two initial signals need to be generated for frequencies f1 and f2, respectively. At this time, the two interference frequencies f1 and f2 need to be processed independently by the method described above.
  • a modulation model is used to modulate the initial signal with frequency f1 to obtain a modulated signal with frequency f1
  • the modulation model is used to perform the initial signal with frequency f2 Modulate to get a modulated signal with frequency f2.
  • the device of the embodiment of the present application can flexibly eliminate signals on the interference frequency.
  • the processor 310 is specifically configured to: perform discrete Fourier transform DFT on the target signal; determine the interference frequency and the amplitude and / or phase information of the interference frequency signal according to the result of the DFT.
  • the processor 310 may be a DFT module. By performing DFT on the target signal output by the system, a DFT spectrogram may be obtained, from which the amplitude and / or phase information of the signal at the interference frequency may be obtained.
  • N adj is the sampling point corresponding to the interference frequency
  • f s is the sampling frequency of the DFT
  • f adj is the interference frequency.
  • the processor 310 is further configured to determine the number of interference frequencies according to the bandwidth of the system and the frequency interval of adjacent channels in the system.
  • the number of interference frequencies to be processed is equal to the system bandwidth divided by the frequency interval of adjacent channels.
  • the frequency interval of adjacent channels can usually be agreed in advance by the agreement.
  • the processor 310 determines the amplitude and phase information of the signals on Nadj , 2N adj, and 3N adj from the DFT spectrum diagram.
  • the frequencies corresponding to N adj , 2N adj and 3N adj are denoted as f1, f2 and f3, respectively.
  • the device 300 may include three signal generators 320 and three signal modulators 330.
  • the three signal generators 320 generate three initial signals with frequencies f1, f2, and f3, respectively.
  • the three signal modulators 330 modulate the initial signals at frequencies f1, f2, and f3 based on the modulation model such as the LMS algorithm, according to the amplitude and phase information of the signals corresponding to the frequencies Nadj , 2N adj, and 3N adj , respectively. Modulation signal.
  • the three modulated signals are input into the system and combined with the target signal to be output by the system at the next clock, thereby canceling the signals at these three frequencies.
  • the modulation model includes an LMS algorithm.
  • the initial signal generated in each clock can be modulated according to the following formula.
  • x (n) is the input vector, such as the initial signal
  • w (n) is the weight vector, which can be used to modulate the amplitude and / or phase of x (n)
  • y (n) is the actual output
  • the signal is, for example, a modulated signal, that is, a signal of the interference frequency that can actually be cancelled in the next clock
  • d (n) is a desired output signal, that is, a signal of the interference frequency that is expected to be canceled, for example, the initial signal
  • n) is the deviation, for example, it can be the signal at the detected interference frequency
  • ⁇ is the convergence factor, which is used to control the convergence speed and stability.
  • the signal modulator 330 is specifically configured to: determine whether the amplitude of the interference frequency signal exceeds a threshold; if the amplitude of the interference frequency signal exceeds the threshold, based on the modulation model, based on the interference frequency
  • the signal amplitude and / or phase information modulates the initial signal to obtain the modulated signal.
  • the signal modulator 330 is further configured to: if the amplitude of the signal of the interference frequency does not exceed the preset threshold, keep the modulation signal the same as the modulation signal of the previous clock input system.
  • the amplitude of the interference frequency signal detected at the current clock is less than or equal to the preset threshold, it can be considered that the interference of the interference frequency signal on the target signal has been controlled within an acceptable range. Therefore, it shows that the modulation signal of the previous clock input system can control the interference frequency signal carried in the target signal to an appropriate range, then the amplitude and phase of the modulation signal generated by the current clock can be kept the same as the previous clock input system. The amplitude and phase of the modulated signal are the same.
  • the initial signal is continued based on the modulation model Remodulate.
  • the dotted line shown in FIG. 2 indicates this threshold.
  • the thresholds corresponding to the sampling point intervals where different interference frequencies are located may be different. The closer the interference frequency to the target signal frequency is, the larger the threshold value is, and the farther the interference frequency from the target signal frequency is, the smaller the threshold value is.
  • N adj to the sampling point for example, if the amplitude of the signal corresponding to the N adj below the dotted line, the same as with the degree of modulation of a clock signal, the initial degree of modulation of the initial signal, can be understood as follows on a clock output the modulated signal without further adjustment; if N adj corresponding signal amplitude above the broken line, the model based on the modulation signal to readjust the initial.
  • the initial signal and the modulated signal are sinusoidal signals.
  • the initial signal and the modulated signal may also be other types of signals, or a signal formed by superimposing multiple signals, such as Gaussian frequency shift keying (Gauss frequency shift keying, GFSK), quadrature phase shift key Control (Quadrature Phase Shift Keying, QPSK) and other modulated signals.
  • Gaussian frequency shift keying Gauss frequency shift keying, GFSK
  • quadrature phase shift key Control Quadrature Phase Shift Keying, QPSK
  • the signal generator 320 is a Direct Digital Synthesizer (DDS) module.
  • DDS Direct Digital Synthesizer
  • the DDS module includes a digitally oscillated controller (Numerically Controlled Oscillator, NCO).
  • NCO Numerically Controlled Oscillator
  • NCO can generate sine and cosine signals through Look Up Table (LUP), Coordinate Rotation Digital Computing (CORDIC) and other methods.
  • LUP Look Up Table
  • CORDIC Coordinate Rotation Digital Computing
  • the system includes a digital phase locked loop, and the device is used to reduce the signal of the interference frequency carried in the input signal of the DCO in the digital phase locked loop.
  • the method for eliminating frequency interference according to the embodiment of the present application may be applied to any system with frequency interference.
  • a digital phase-locked loop Digital Phase-Locked Loop, DPLL
  • DPLL Digital Phase-Locked Loop
  • the digital phase-locked loop includes a digital converter (Time to Digital Converter, TDC) and a DCO, and a low-pass filter (Low-Pass Filter, LPF) is provided between the TDC and the DCO, One end of the LPF is connected to the output end of the TDC, and the other end is connected to the input end of the DCO.
  • a multi-mode frequency divider (Multi-Modulus Divider, MMD) is connected between the input end of the DCO and one input end of the TDC.
  • MMD Multi-Modulus Divider
  • a device for eliminating frequency interference in the embodiment of the present application may be provided between the TDC and the LPF.
  • the DFT module is connected to the input terminal of the TDC, and is used to detect the target signal output by the system at the current clock to obtain the amplitude and / or phase information of the interference frequency signal carried in the target signal.
  • the DDS can generate an initial signal such as a sinusoidal signal.
  • the output of the DDS is connected to the input of the signal modulator.
  • the output of the signal modulator is connected to the output of the TDC.
  • the signal modulator can modulate the initial signal. Modulated signal.
  • the modulated signal is input to the system for eliminating the interference frequency signal carried in the signal output by the next clock.
  • an LMS module may also be provided between the DFT module and the signal modulator.
  • the LMS module After receiving the amplitude and phase information of the detected interference frequency signal sent by the DFT module, the LMS module performs LMS calculation to determine the initial Modulation of the amplitude and phase of the signal, and the calculated modulation is passed to the signal modulator, so that the signal modulator adjusts the initial signal accordingly.
  • the LMS module can be integrated in the signal modulator as a part of the signal modulator, for example as a processing unit of the dry signal modulator; or as an independent processing unit; or the LMS module can also be integrated with the DFT module ; This application does not limit this.
  • FIG. 4 only shows the case where there is one interference source, that is, the channel transmitting the target signal is only affected by an adjacent channel, and the interference frequency caused by the adjacent channel may be, for example, N adj shown in FIG. 2 Corresponding interference frequency f1.
  • three DDSs need to be set based on the interference frequency f1, f2, and f3 generate three initial signals.
  • a signal modulator is connected to the output of each DDS, and the three signal modulators modulate the initial signals with frequencies f1, f2, and f3, respectively, thereby obtaining three modulated signals with frequencies f1, f2, and f3.
  • the device 300 for eliminating frequency interference may execute the corresponding method in the above method 100, and the various embodiments described in the method 100 may be applied to the device 300, and for the sake of brevity, no further description is provided here.
  • An embodiment of the present application also provides an apparatus for eliminating frequency interference, including a memory and a processor.
  • the processor can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • B corresponding to (corresponding to) A means that B is associated with A, and B can be determined according to A.
  • determining B based on A does not mean determining B based on A alone, and B may also be determined based on A and / or other information.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or may Integration into another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the devices and devices mentioned in this application may be chip systems, or may be devices or devices with a housing.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
  • this function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the embodiments of the present application.
  • the foregoing storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disks or optical disks and other media that can store program codes .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)

Abstract

La présente invention concerne un appareil et un procédé pour éliminer des interférences de fréquences, capables de réduire des interférences de fréquences dans un système. L'appareil comprend : un processeur configuré pour détecter un signal cible délivré par un système à un instant actuel pour obtenir des informations d'amplitude et/ou de phase d'un signal de fréquence d'interférences transporté dans le signal cible ; un générateur de signaux configuré pour générer un signal initial sur la base de la fréquence d'interférences ; et un modulateur de signaux configuré pour moduler le signal initial sur la base d'un modèle de modulation selon les informations d'amplitude et/ou de phase du signal de fréquence d'interférences, et délivrer le signal de modulation obtenu au système pour éliminer le signal de fréquence d'interférences transporté dans un signal délivré à un prochain instant, le modèle de modulation étant utilisé pour calculer la quantité d'ajustement de l'amplitude et/ou de la phase du signal initial.
PCT/CN2018/111975 2018-10-25 2018-10-25 Appareil et procédé d'élimination d'interférences de fréquences WO2020082311A1 (fr)

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CN201880097210.3A CN112913149A (zh) 2018-10-25 2018-10-25 消除频率干扰的装置和方法

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CN117591065B (zh) * 2023-11-24 2024-06-18 北京国科天迅科技股份有限公司 信号处理电路、信号处理方法和信号处理芯片

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CN1129050A (zh) * 1994-04-21 1996-08-14 艾利森公司 降低电子设备中来自振荡器的干扰
CN102742235A (zh) * 2011-12-02 2012-10-17 华为技术有限公司 消除邻道干扰的方法、调制解调器及系统
CN102980722A (zh) * 2012-12-05 2013-03-20 合肥工业大学 一种适用于在线动平衡的不平衡信号提取法
EP3296992A1 (fr) * 2008-03-20 2018-03-21 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Appareil et procédé pour modifier une représentation paramétrée

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CN101453228B (zh) * 2007-12-04 2013-04-17 松下电器产业株式会社 共站址干扰消除系统和方法
CN101420246B (zh) * 2008-11-21 2013-09-11 华为技术有限公司 一种收发信机抵消发射干扰的方法、设备及收发信机
JP6272709B2 (ja) * 2014-02-26 2018-01-31 パナソニック株式会社 無線通信装置及び干渉検出方法
CN106982097A (zh) * 2017-05-23 2017-07-25 广东欧珀移动通信有限公司 射频干扰消除方法、装置、存储介质和终端
CN108011644B (zh) * 2017-11-29 2019-11-19 浙江大华技术股份有限公司 一种消除相邻信道干扰的方法及装置

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CN1129050A (zh) * 1994-04-21 1996-08-14 艾利森公司 降低电子设备中来自振荡器的干扰
EP3296992A1 (fr) * 2008-03-20 2018-03-21 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Appareil et procédé pour modifier une représentation paramétrée
CN102742235A (zh) * 2011-12-02 2012-10-17 华为技术有限公司 消除邻道干扰的方法、调制解调器及系统
CN102980722A (zh) * 2012-12-05 2013-03-20 合肥工业大学 一种适用于在线动平衡的不平衡信号提取法

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