CN114499736A

CN114499736A - Method for removing spurs interference of WIFI system, computer storage medium and broadband system

Info

Publication number: CN114499736A
Application number: CN202011259237.3A
Authority: CN
Inventors: 刘小同; 蔡金辰; 焦金良; 牛进
Original assignee: Amlogic Shanghai Co Ltd
Current assignee: Amlogic Shanghai Co Ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2022-05-13
Anticipated expiration: 2040-11-12
Also published as: CN114499736B

Abstract

The invention discloses a method for removing spurs interference of a WIFI system, a computer storage medium and a broadband system, wherein the method comprises the following steps: acquiring an input signal; in a time domain, the input signal is sequentially subjected to multi-stage spur interference removal processing, wherein the spur interference at least comprises direct current offset interference, HDMI interference and CW interference. The method for removing the spurs interference of the WIFI system can better eliminate the influence of spurs interference signals on the performance of the receiver and avoid the problem that the receiver cannot work normally due to overlarge spurs interference signals.

Description

Method for removing spur interference of WIFI system, computer storage medium and broadband system

Technical Field

The present invention relates to the field of signal processing, and in particular, to a method, a computer storage medium, and a broadband system for removing spurs interference in a WIFI (Wireless Fidelity) system.

Background

In the design of a WIFI chip system, various spurs are generated due to existence of non-ideal factors, and the performance of a receiver is deteriorated. For example, after RX DC Calibration, due to the influence of RF (Radio Frequency) circuit and Calibration precision, the receiver generates DC Offset (Direct Current) at DC (Direct Current), and due to the existence of oscillator XOSC Frequency harmonic (harmonic Wave), the receiver is in the receiving band, causing CW (continuous Wave) interference; in an actual WIFI chip system, due to radio frequency leakage of an HDMI (High Definition Multimedia Interface) clock and data, interference of HDMI is caused in a received frequency band range. When the strength of these spurs is large enough to reach a certain threshold, the receiver will not function properly.

For the elimination of the spurs interference, a frequency domain processing mode is generally adopted, that is, after FFT (fast Fourier transform) processing is performed on an input signal, spurs larger than a certain threshold are detected in a frequency domain response, and the corresponding position is set to 0 to process the influence of the spurs interference on the system. In the WIFI system, since data exists discontinuously in a packet type, for example, in a packet (data packet), each OFDM (Orthogonal Frequency Division Multiplexing) packet length is 4us, so that the data packet is converted into a Frequency domain, due to truncation of an FFT window, a Frequency domain response of a signal becomes a sine function (sine function), when a receiver has a small Frequency offset, a spectral spread may be caused on a sampling point by a spurt signal, and only a Frequency domain processing method is adopted to eliminate a Frequency response at an interference point, but not completely eliminate the interference.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a method for removing spurs interference in a WIFI system, which can remove spurs interference signals and ensure that a receiver works normally.

A second object of the invention is to propose a non-transitory computer storage medium.

A third object of the invention is to propose a broadband system.

In order to achieve the above object, an embodiment of a first aspect of the present invention provides a method for removing spurr interference of a WIFI system, where the method includes: acquiring an input signal; in a time domain, the input signal is sequentially subjected to multi-stage spur interference removal processing, wherein the spur interference at least comprises direct current offset interference, HDMI interference and CW interference.

According to the method for removing spurs interference of the WIFI system, disclosed by the embodiment of the invention, the input signal is sequentially subjected to multi-stage spurs interference removal processing in the time domain, namely, direct current offset interference, HDMI interference and CW interference in the input signal are removed in the time domain, and compared with the method for processing the input signal in the frequency domain, the method can only eliminate the frequency response at an interference point.

In some embodiments, in the time domain, the input signal is sequentially subjected to multi-stage spur interference removal processing, including: obtaining a direct current offset interference signal in the input signal and a time delay signal of the input signal; removing the DC offset interference signal from the time delay signal of the input signal; and selectively taking one of the time delay signal of the input signal, the signal after the direct current offset interference signal is removed and the input signal as a first-stage output signal according to a first configuration signal.

In some embodiments, selectively using one of the time-delayed signal of the input signal, the signal from which the dc offset interference signal is removed, and the input signal as the first stage output signal according to the first configuration signal includes: the first configuration signal comprises a first configuration sub-signal and a second configuration sub-signal; the first configuration sub-signal is active, taking the input signal as the first stage output signal; the first configuration sub-signal is invalid and the second configuration sub-signal is valid, and the time delay signal of the input signal is used as the first stage output signal; and the first configuration sub-signal and the second configuration sub-signal are both invalid, and the signal with the DC offset interference signal removed is used as the first-stage output signal. And the selective output of the input signal is realized by controlling the validity or invalidity of the first configuration sub-signal and the second configuration sub-signal.

In some embodiments, in the time domain, the input signal is sequentially subjected to multi-stage spur interference removal processing, including: carrying out frequency spectrum shifting on the input signal according to the frequency point of the spur interference signal; filtering the signal after the frequency spectrum shifting to obtain a spurs interference signal; moving the spectrum of the spurs interference signal back to the original frequency; and removing the spur interference signal from the time delay signal of the input signal.

In some embodiments, in the time domain, sequentially performing multi-stage spur interference removal processing on the input signal, further includes: respectively carrying out first path of frequency spectrum shifting processing and second path of frequency spectrum shifting processing on the first-stage output signal according to the HDMI interference point so as to obtain a first path of HDMI interference component and a second path of HDMI interference component; adding the first path of HDMI interference component and the second path of HDMI interference component to obtain an HDMI interference signal; obtaining a time delay signal of the first-stage output signal, and removing the HDMI interference signal from the time delay signal of the first-stage output signal to obtain a signal with the HDMI interference signal removed; and selectively taking the signal subjected to the removal of the HDMI interference signal or the first-stage output signal as a second-stage output signal according to a second configuration signal. The signal with the HDMI interference signal filtered is obtained by carrying out frequency spectrum shifting and filtering processing on the input signal, and support is provided for removing the HDMI interference signal from the input signal.

In some embodiments, respectively performing a first path of spectrum shifting processing and a second path of spectrum shifting processing on the first-stage output signal according to the HDMI interference frequency point to obtain a first path of HDMI interference component and a second path of HDMI interference component, includes: carrying out first frequency spectrum shifting on the first-stage output signal according to a first HDMI interference scrambling point, filtering the signal subjected to the first frequency spectrum shifting, carrying out second frequency spectrum shifting on the filtered signal, and shifting the filtered signal back to the first HDMI interference scrambling point to obtain a first path of HDMI interference component; and carrying out first frequency spectrum shifting on the first-stage output signal according to a second HDMI interference frequency point, filtering the signal subjected to the first frequency spectrum shifting, carrying out second frequency spectrum shifting on the filtered signal, and shifting the filtered signal back to the second HDMI interference frequency point to obtain a second path of HDMI interference component.

In some embodiments, after obtaining the first path of HDMI interference component and the second path of HDMI interference component, the method further comprises: and selectively controlling the output of the first path of HDMI interference component and the second path of HDMI interference component according to a third configuration signal.

In some embodiments, selectively controlling the output of the first path of HDMI interference component and the second path of HDMI interference component according to a third configuration signal includes: the third configuration signal comprises a third configuration sub-signal and a fourth configuration sub-signal; when the third configuration sub-signal is valid, the output of the first path of frequency spectrum after moving processing is 0, or when the third configuration sub-signal is invalid, the first path of frequency spectrum after moving processing is output of the first path of HDMI interference component; and when the fourth configuration sub-signal is valid, the output of the second path of frequency spectrum after the shift processing is 0, or when the fourth configuration sub-signal is invalid, the output of the second path of HDMI interference component after the shift processing of the second path of frequency spectrum.

In some embodiments, selectively regarding the HDMI jammer removed signal or the first stage output signal as a second stage output signal according to a second configuration signal includes: when the second configuration signal is valid, taking the first-stage output signal as the second-stage output signal; or when the second configuration signal is invalid, taking the signal without the HDMI interference signal as the second-stage output signal.

In some embodiments, in the time domain, sequentially performing multi-stage spur interference removal processing on the input signal, further includes: respectively carrying out third path frequency spectrum shifting processing and fourth path frequency spectrum shifting processing on the second-level output signal according to the CW interference frequency point so as to obtain a first path of CW interference component and a second path of CW interference component; adding the first path of CW interference component and the second path of CW interference component to obtain a CW interference signal; obtaining a time delay signal of the second-stage output signal, and removing the CW interference signal from the time delay signal of the second-stage output signal to obtain a signal with the CW interference signal removed; and selectively taking the signal after the CW interference signal is removed or the second-stage output signal as a third-stage output signal according to a fourth configuration signal.

In some embodiments, the performing, according to the CW interference frequency point, third and fourth spectrum shifting processes on the second-stage output signal respectively to obtain a first path of CW interference component and a second path of CW interference component includes: carrying out first frequency spectrum shifting on the second-level output signal according to a first CW interference frequency point, filtering the signal after the first frequency spectrum shifting, carrying out second frequency spectrum shifting on the filtered signal, and shifting the filtered signal back to the first CW interference frequency point to obtain a first path of CW interference component; and carrying out first frequency spectrum shifting on the second-level output signal according to a second CW interference frequency point, filtering the signal after the first frequency spectrum shifting, carrying out second frequency spectrum shifting on the filtered signal, and shifting the filtered signal back to the second CW interference frequency point to obtain a second path of CW interference components.

In some embodiments, after obtaining the first path of CW interference components and the second path of CW interference components, the method further includes: and selectively controlling the output of the first path of CW interference component and the second path of CW interference component according to a fifth configuration signal.

In some embodiments, selectively controlling the output of the first and second paths of CW interference components according to a fifth configuration signal includes: the fifth configuration signal comprises a fifth configuration sub-signal and a sixth configuration sub-signal; when the fifth configuration sub-signal is valid, the output of the third path of frequency spectrum after moving processing is 0, or when the fifth configuration sub-signal is invalid, the output of the first path of CW interference component after moving processing of the third path of frequency spectrum; and when the sixth configuration sub-signal is valid, the fourth path of frequency spectrum is output as 0 after being shifted, or when the sixth configuration sub-signal is invalid, the fourth path of frequency spectrum is output as the second path of CW interference component after being shifted.

In some embodiments, selectively regarding the CW interference signal-removed signal or the second-stage output signal as a third-stage output signal according to a fourth configuration signal includes: when the fourth configuration signal is valid, taking the second-stage output signal as the third-stage output signal; or, when the fourth configuration signal is invalid, taking the signal without the CW interference signal as the third-stage output signal.

In some embodiments, the method further comprises: selectively controlling the input signal or the third stage output signal as a final output signal according to a sixth configuration signal.

In some embodiments, selectively controlling the input signal or the third stage output signal as the final output signal according to a sixth configuration signal comprises: the sixth configuration signal is active, outputting the input signal as the final output signal; or, the sixth configuration signal is invalid, and the third-stage output signal is output as the final output signal.

In order to achieve the above object, a non-transitory computer storage medium is proposed in an embodiment of a second aspect of the present invention, on which a computer program is stored, and the computer program, when executed by a processor, implements the method for removing spurr interference of a WIFI system described in the above embodiment.

In order to achieve the above object, an embodiment of a third aspect of the present invention provides a broadband system, including: a receiver; the apparatus for removing the spurt interference of the WIFI system is used for executing the method for removing the spurt interference of the WIFI system described in the above embodiment to remove the spurt interference of the signal received by the receiver.

According to the broadband system, the device for removing the spurs interference of the WIFI system removes the spurs interference signal in the input signal, so that the influence of the spurs interference signal on the performance of the receiver can be better eliminated, and the problem that the receiver cannot work normally due to the fact that the spurs interference signal is too large is avoided.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a flowchart of a method for removing spurr interference of a WIFI system according to one embodiment of the present invention;

fig. 2 is a flowchart of a method for removing spurr interference of a WIFI system according to one embodiment of the present invention;

fig. 3 is a flowchart of a method for removing spurr interference of a WIFI system according to one embodiment of the present invention;

fig. 4 is a flowchart of a method for removing spurr interference of a WIFI system according to one embodiment of the present invention;

fig. 5 is a flowchart of a method for removing spurr interference of a WIFI system according to one embodiment of the present invention;

fig. 6 is a flowchart of a method for removing spurr interference of a WIFI system according to one embodiment of the present invention;

FIG. 7a is a schematic diagram of a time domain waveform with interference signal collected at 20M bandwidth according to an embodiment of the present invention;

FIG. 7b is a schematic diagram of the frequency response of a band interference signal acquired at 20M bandwidth in accordance with one embodiment of the present invention;

FIG. 8a is a schematic diagram of a time domain waveform with an interference signal collected at a bandwidth of 40M according to an embodiment of the present invention;

FIG. 8b is a schematic diagram of a frequency domain response of a jammer signal acquired at 40M bandwidth in accordance with one embodiment of the present invention;

FIG. 9a is a schematic diagram of a time domain waveform with an interference signal collected at a bandwidth of 80M according to an embodiment of the present invention;

FIG. 9b is a schematic diagram of the frequency domain response of an interfering signal acquired at 80M bandwidth in accordance with one embodiment of the present invention;

fig. 10a is a schematic diagram of a time-domain waveform of a DC interference signal estimated by an apparatus for removing spurs interference in a WIFI system with a bandwidth of 80M according to an embodiment of the present invention;

fig. 10b is a schematic diagram of the frequency domain response of the DC interference signal estimated by the apparatus for removing spurs interference of the WIFI system with 80M bandwidth according to an embodiment of the present invention;

fig. 11a is a schematic diagram of a time-domain waveform of a CW interference signal estimated by an apparatus for removing spurs interference of a WIFI system with a bandwidth of 80M according to an embodiment of the present invention;

fig. 11b is a schematic diagram of the frequency domain response of the CW interference signal estimated by the apparatus for removing spur interference from a WIFI system with 80M bandwidth according to an embodiment of the present invention;

fig. 12a is a schematic diagram of a time domain waveform of an apparatus input signal with 80M bandwidth to remove spurr interference of a WIFI system according to one embodiment of the present invention;

fig. 12b is a schematic diagram of a frequency domain response of a device input signal with 80M bandwidth to remove spurr interference from a WIFI system, in accordance with one embodiment of the present invention;

fig. 13a is a schematic diagram of a time domain waveform of an output signal of an apparatus with 80M bandwidth for removing spurr interference of a WIFI system according to an embodiment of the present invention;

fig. 13b is a schematic diagram of the frequency domain response of the device output signal with 80M bandwidth to remove spurr interference from the WIFI system, in accordance with one embodiment of the present invention;

fig. 14 is a block diagram of a broadband system according to one embodiment of the invention.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, which are illustrated in the accompanying drawings and are intended to be illustrative of the invention and not to be construed as limiting the invention.

In this embodiment, an input signal is processed in a time domain for the defects of the frequency domain processing method, and the principle of the method is mainly to extract a spur interference signal from a received signal in the time domain, and subtract the obtained spur interference signal from the input signal, so as to eliminate the influence of the spur interference signal on a receiver and avoid the situation that the reception cannot normally work due to the excessive strength of the spur interference signal.

Interference bins for DC offset interference, HDMI interference and CW interference, e.g. for a digital television receiverShown in Table 1, f_sFor the sampling frequency, x1(n) is the output signal of the digital frequency converter.

TABLE 1

The frequency spectrum shifting of the signal is mainly realized by adopting a frequency conversion method, a formula (1-1) defines a digital frequency conversion calculation method, x (n) is the input of a digital frequency converter, a complex signal from A/D sampling, and f is the input of the digital frequency converter, namely the frequency point of an interference signal.

Formula (1-1):

the output of the digital frequency converter is filtered out of band noise by a low-pass filter, and the formula (1-2) defines a digital expression. x1(n) is a filter input, y1(n) is a filter output, α is an update step, and the update step is related to a filter bandwidth, as shown in table 2, it can indicate that α outputs a signal bandwidth under different values, in order to quickly capture an interference signal, in the embodiment, a variable step coefficient is used to implement, as shown in formula (1-3), where cnt is a counter of an input signal sampling point, and a value of the variable step coefficient α is selected according to formula (1-3) according to a count value at a current time. The step size alpha at which the low pass filter eventually settles can be configured according to the register settings.

Formula (1-2): y1(n) ═ y1(n-1) + { x1(n) -y1(n-1) }. alpha.

Formula (1-3):

TABLE 2

Updating the step size alpha	Signal bandwidth (-3dB)
		2^-4	800K
2^-5	400K
		2^-6	200K
2^-7	100K
		2^-8	50K
2^-9	25K
		2^-10	12.5K
2^-11	6.25K
		2^-12	3.125K
2^-13	1.5K
		2^-14	0.75K
2^-15	0.375K

The method for removing the spur interference of the WIFI system is exemplified based on the algorithm basic principle.

The method for removing spurr interference of the WIFI system according to the embodiment of the first aspect of the present invention is described below with reference to fig. 1 to fig. 13.

As shown in fig. 1, the method for removing spurs interference in a WIFI system according to an embodiment of the present invention at least includes step S1 and step S2.

In step S1, an input signal is acquired.

In an embodiment, in order to avoid that the intensity of a spur interference signal in an input signal is too large, which affects the normal operation of a receiver, and when the spur interference signal is greater than a certain threshold, the receiver cannot operate normally, an input signal needs to be processed by interference removal, and when the input signal is processed, the input signal needs to be acquired.

And step S2, in the time domain, sequentially carrying out multi-stage sper interference removal processing on the input signal, wherein the sper interference at least comprises direct current offset interference, HDMI interference and CW interference.

In the embodiment, after the input signal is acquired, the input signal is processed to obtain a spur interference signal, the spur interference signal is subtracted from the received input signal in a time domain, and the direct current offset interference, the HDMI interference and the CW interference in the input signal are sequentially removed, so that the spur interference signal in the input signal can be removed to a great extent or completely, the influence of the spur interference signal on the performance of the receiver is avoided, and the normal operation of the receiver is ensured. Compared with the method for processing the input signal in the frequency domain, when the receiver has a small frequency offset, the spectral spread of the spurs interference signal on the sampling point can be caused, the frequency response at the interference point can only be eliminated by adopting the method for processing the frequency domain, and the influence of the spurs interference signal on the performance of the receiver cannot be completely eliminated.

In some embodiments, as shown in fig. 2, a flowchart of a method for removing spurr interference of a WIFI system according to an embodiment of the present invention is shown. In step S2, sequentially performing multi-stage spectral disturbance removal processing on the input signal in the time domain includes steps S21 to S23, as follows:

and step S21, obtaining the dc offset interference signal in the input signal and the time delay signal of the input signal.

In step S22, the dc offset interference signal is removed from the time-delayed signal of the input signal.

And step S23, selectively taking one of the time delay signal of the input signal, the signal after the DC offset interference signal is removed and the input signal as a first-stage output signal according to the first configuration signal.

In some embodiments, as shown in fig. 3, a flowchart of a method for removing spurr interference of a WIFI system according to an embodiment of the present invention is shown. Step S23, selectively taking one of the delayed signal of the input signal, the signal after removing the dc offset interference signal, and the input signal as the first stage output signal according to the first configuration signal includes steps S231-S234 as follows:

in step S231, the first configuration signal includes a first configuration sub-signal and a second configuration sub-signal.

In step S232, the first configuration sub-signal is valid, and the input signal is used as the first-stage output signal.

In step S233, the first configuration sub-signal is invalid and the second configuration sub-signal is valid, and the delay signal of the input signal is used as the first-stage output signal.

In step S234, the first configuration sub-signal and the second configuration sub-signal are both invalid, and the signal from which the dc offset interference signal is removed is used as the first-stage output signal.

For example, when the input signal, for example, x, is subjected to the first stage interference removal processing, the input signal x is subjected to the first filtering processing to filter out the dc offset interference signal therein, and the filtered output signal x _ dc0, and the input signal x is subjected to the delay processing to output the delay signal x _ dly0, by controlling the first configuration signal to be active or inactive, the first selector output signal x _ mux0 is controlled to be either signal x _ dc0 or signal 0, the delay signal x _ dly0 and the output signal x _ mux0 are subtracted by the first arithmetic unit, output signal x _ sub0, output signal x _ sub0 into second selector, output signal x _ mux1, and selectively taking one of a time delay signal of the input signal, a signal after the direct current offset interference signal is removed and the input signal as a first-stage output signal by controlling the first configuration signal to be effective or ineffective. When the first configuration sub-signal is active, the input signal x is directly used as the first-stage output signal, i.e., the first-stage output signal x _ mux1 ═ x.

When the first configuration sub-signal is inactive and the second configuration sub-signal is active, the filtered output signal is signal 0, i.e. x _ mux0 is equal to 0, and at this time, the time-delayed signal of the input signal is taken as the first stage output signal, i.e. x _ sub0 is equal to x _ dly0, and x _ mux1 is equal to x _ sub 0.

When the first configuration sub-signal and the second configuration sub-signal are both invalid, after the filtered output signal x _ dc0 is selected by the selector, the output signal x _ dc0, namely x _ mux0 is equal to x _ dc0, at this time, the delay signal x _ dly0 output signal and x _ dc0 are subtracted by the first arithmetic unit, and the signal from which the dc offset interference signal is removed is used as a first-stage output signal, namely x _ sub0 is equal to x _ dly0-x _ dc 0; x _ mux1 x _ sub 0. And the interference removal control of the input signal is realized by controlling the validity or the invalidity of the first configuration sub-signal and the second configuration sub-signal.

In some embodiments, as shown in fig. 4, a schematic diagram of a method for removing spurr interference of a WIFI system according to an embodiment of the present invention is shown. In step S2, sequentially performing multi-stage spectral disturbance removal processing on the input signal in the time domain includes steps S24 to S27, as follows:

and S24, carrying out frequency spectrum shift on the input signal according to the frequency point of the spurs interference signal.

And S25, filtering the signal with shifted frequency spectrum to obtain a spurs interference signal.

And S26, moving the spectrum of the spurs interference signal back to the original frequency.

S27, removing the spurs interference signal from the time-delayed signal of the input signal, so as to remove the spurs interference in the input signal x.

In some embodiments, as shown in fig. 5, which is a schematic diagram of a method for removing spurr interference in a WIFI system according to an embodiment of the present invention, in the time domain, sequentially performing multi-stage spurr interference removal processing on an input signal further includes steps S3 to S6.

Step S3, respectively perform a first path of spectrum shifting processing and a second path of spectrum shifting processing on the first-level output signal according to the HDMI interference frequency point, so as to obtain a first path of HDMI interference component and a second path of HDMI interference component.

And step S4, adding the first path of HDMI interference component and the second path of HDMI interference component to obtain an HDMI interference signal.

Step S5, obtaining a time delay signal of the first-stage output signal, and removing the HDMI interference signal from the time delay signal of the first-stage output signal to obtain a signal with the HDMI interference signal removed.

And step S6, selectively taking the signal after the HDMI interference signal is removed or the first-stage output signal as a second-stage output signal according to a second configuration signal.

For example, as shown in fig. 5, sequentially performing multi-stage spectral interference removal processing on an input signal x in a time domain further includes outputting a first-stage output signal x _ mux1 after the input signal x is subjected to first-stage interference removal processing, and performing second-stage interference removal processing on the first-stage output signal x _ mux1, that is, the first-stage output signal x _ mux1 is divided into two paths for processing when performing second-stage interference removal processing, and performing first-path frequency spectrum shifting processing and second-path frequency spectrum shifting processing on the first-stage output signal according to an HDMI interference point to obtain a first-path HDMI interference component and a second-path HDMI interference component, where the first-path HDMI interference component and the second-path HDMI interference component enter a second arithmetic unit for addition operation to obtain an HDMI interference signal; and after the first-stage output signal x _ mux1 is subjected to second time delay processing, outputting a time delay signal of the first-stage output signal x _ mux1, when a time delay signal of the first-stage output signal x _ mux1 is obtained, enabling the HDMI interference signal and the time delay signal of the first-stage output signal to enter a third arithmetic unit for subtraction, subtracting the HDMI interference signal from the time delay signal of the first-stage output signal, namely subtracting the HDMI interference signal from the time delay signal of the first-stage output signal in a time domain to obtain a signal with the HDMI interference signal removed, and selectively taking the signal with the HDMI interference signal removed or the first-stage output signal as a second-stage output signal by controlling validity or invalidity of a second configuration signal.

In some embodiments, when the second-stage interference removing processing is performed on the first-stage output signal x _ mux1, the first-path spectrum shifting processing and the second-path spectrum shifting processing are performed on the first-stage output signal x _ mux1 according to the HDMI interference frequency point-f_hdmi0Carrying out first frequency spectrum shifting processing on a first-stage output signal x _ mux1, carrying out first frequency spectrum shifting processing on the first-stage output signal x _ mux1 through a first frequency spectrum to output a signal x _ ddc0, carrying out second filtering processing on a signal x _ ddc0, taking out a direct current signal therein through filtering, outputting a signal x _ dc1, carrying out second frequency spectrum shifting on the filtered signal, moving the filtered signal back to a first HDMI interference scrambling point, namely moving an output signal x _ dc1 back to f_hdmi0At least one of (1) and (b); after the output signal x _ dc1 is subjected to the second spectrum shifting process, the output signal x _ ddc1 is output to obtain the first path of HDMI interference component. The frequency f in the output signal x _ mux1 is obtained by carrying out the first path of frequency spectrum shifting processing on the first stage output signal_hdmi0The HDMI interference at (b), i.e. the first HDMI interference component.

Meanwhile, when the second path of frequency spectrum shifting processing is carried out on the first-stage output signal x _ mux1, according to the second HDMI interference frequency point-f_hdmi1The first stage output signal x _ mux1 is processedThree-frequency spectrum shifting processing is carried out, the first-stage output signal x _ mux1 is subjected to third frequency spectrum shifting to output a signal x _ ddc2, the signal x _ ddc2 is subjected to third filtering processing, a direct current signal in the signal is extracted through filtering, a signal x _ dc2 is output, then fourth frequency spectrum shifting is carried out on the filtered signal, the filtered signal is shifted back to a second HDMI interference scrambling point, namely the output signal x _ dc2 is shifted back to f_hdmi1After the output signal x _ dc2 is shifted by the fourth frequency spectrum, the signal x _ ddc3 is output to obtain the second path of HDMI interference component. The frequency f in the first-stage output signal x _ mux1 is obtained by carrying out the second path of frequency spectrum shifting processing on the first-stage output signal_hdmi1The HDMI interference at (b), i.e. the second path of HDMI interference component.

In some embodiments, after the first path of HDMI interference component and the second path of HDMI interference component are obtained, the output of the first path of HDMI interference component and the output of the second path of HDMI interference component are selectively controlled by controlling the third configuration signal to be active or inactive.

For example, the third configuration signal includes a third configuration sub-signal and a fourth configuration sub-signal, and the output signal x _ mux2 of the fourth selector is controlled to be the signal x _ ddc1 or the signal 0 by controlling the third configuration sub-signal to be valid or invalid, when the third configuration sub-signal is valid, the output signal x _ mux2 is 0, that is, the first-stage output signal is output as 0 after the first path of spectrum shifting processing, or, when the third configuration sub-signal is invalid, the output signal x _ mux2 is x _ ddc1, that is, the first path of HDMI interference component is output after the first path of spectrum shifting processing;

and controlling the output signal x _ mux3 of the fifth selector to be a signal x _ ddc3 or a signal 0 by controlling the fourth configuration sub-signal to be valid or invalid, wherein when the fourth configuration sub-signal is valid, the output signal x _ mux3 is equal to 0, that is, the first-stage output signal is output to be 0 after the second path of frequency spectrum shifting processing, or when the fourth configuration sub-signal is invalid, the output signal x _ mux3 is equal to x _ ddc3, that is, the second path of HDMI interference component is output after the second path of frequency spectrum shifting processing. The output signal x _ mux2 and the output signal x _ mux3 are subjected to addition operation through a second arithmetic unit to obtain an output signal x _ add1, the output signal x _ add1 and the time delay signal of the first-stage output signal x _ mux1 enter a third arithmetic unit to perform subtraction operation, the output signal x _ add1 is subtracted from the time delay signal of the first-stage output signal x _ mux1 to obtain an output signal x _ sub1, and the output signal x _ sub1 is processed through a selector to output a signal x _ mux 4.

In some embodiments, selectively using the signal without the HDMI interference signal or the first-stage output signal as the second-stage output signal according to the second configuration signal includes controlling the output signal of the third selector by controlling the second configuration signal to be active or inactive, and when the second configuration signal is active, the output signal x _ mux4 is equal to x _ mux1, that is, the first-stage output signal is used as the second-stage output signal; or when the second configuration signal is invalid, the output signal x _ mux4 is x _ sub1, that is, the signal from which the HDMI interference signal is removed is used as the second stage output signal. In the hardware implementation, the time delay of the first-stage output signal is 7 symbols by performing the second-stage interference removal processing, wherein the time delay of the signal subjected to the frequency spectrum shifting is 3 symbols, and the time delay of the signal subjected to the filtering is 1 symbol.

In some embodiments, as shown in fig. 6, a schematic diagram of a method for removing spurr interference of a WIFI system according to an embodiment of the present invention is shown. In the time domain, the multi-stage spectral disturbance removal processing sequentially performed on the input signal further includes steps S7-S10.

And step S7, respectively carrying out third path frequency spectrum shifting processing and fourth path frequency spectrum shifting processing on the second-level output signal according to the CW interference frequency point to obtain a first path of CW interference component and a second path of CW interference component.

Step S8, add the first path of CW interference component and the second path of CW interference component to obtain a CW interference signal.

And step S9, obtaining a time delay signal of the second-stage output signal, and removing the CW interference signal from the time delay signal of the second-stage output signal to obtain a signal with the CW interference signal removed.

Step S10, selectively using the signal without CW interference signal or the second-stage output signal as a third-stage output signal according to a fourth configuration signal.

For example, as shown in fig. 6, a third-stage interference removing process is performed on the second-stage output signal x _ mux4, and a third-stage spectrum shifting process and a fourth-stage spectrum shifting process are respectively performed on the second-stage output signal x _ mux4 according to a CW interference frequency point, so as to obtain a first-stage CW interference component and a second-stage CW interference component; the first path of CW interference component and the second path of CW interference component are subjected to addition operation through a fourth arithmetic unit to obtain a CW interference signal; the second-stage output signal x _ mux4 is subjected to third time delay processing to obtain a time delay signal of the second-stage output signal x _ mux4, the time delay signal of the second-stage output signal x _ mux4 and the obtained CW interference signal enter a fifth arithmetic unit for subtraction operation, the CW interference signal is removed from the time delay signal of the second-stage output signal x _ mux4, that is, the CW interference signal is subtracted from the time delay signal of the second-stage output signal to obtain a signal from which the CW interference signal is removed; the output signal x _ mux7 of the sixth selector is controlled by controlling the fourth configuration sub-signal to be active or inactive, and the signal from which the CW interference signal is removed or the second-stage output signal is selectively used as the third-stage output signal.

In some embodiments, when the third-stage interference removing processing is performed on the second-stage output signal x _ mux4, a third-stage spectrum shifting processing and a fourth-stage spectrum shifting processing are performed on the second-stage output signal x _ mux4, the second-stage output signal x _ mux4 is divided into two paths to perform the third-stage interference removing processing, and when the third-stage spectrum shifting processing is performed, the fifth-stage spectrum shifting processing is performed on the second-stage output signal x _ mux4, that is, according to the first CW interference frequency point-f_cw0Carrying out fifth frequency spectrum shifting on the second-stage output signal x _ mux4, carrying out fifth frequency spectrum shifting on the second-stage output signal x _ mux4 after the fifth frequency spectrum shifting to output a signal x _ ddc4, carrying out fourth filtering processing on the signal x _ ddc4, taking out a direct current signal therein through filtering, outputting a signal x _ dc3, carrying out sixth frequency spectrum shifting on the filtered signal, moving the filtered signal back to the first CW interference point, namely moving the output signal x _ dc3 back to f_cw0After the output signal x _ dc3 is shifted by the sixth frequency spectrum, the output signal x _ ddc5 is output to obtain the first path of CW interference component, and the third path of frequency spectrum shifting processing is performed on the second-stage output signal x _ mux4 to obtain the frequency f in the output signal x _ mux4_cw0Of CW interference, i.e.The first path of the CW interference component.

When the fourth path of spectrum shifting processing is carried out on the second-stage output signal x _ mux4, the frequency point-f is subjected to the second CW interference_cw1Carrying out seventh frequency spectrum shifting processing on the second-stage output signal x _ mux4, carrying out seventh frequency spectrum shifting processing on the second-stage output signal x _ mux4 after the seventh frequency spectrum shifting, outputting a signal x _ ddc6, carrying out fifth filtering processing on the signal x _ ddc6, taking out a direct current signal therein through filtering, outputting a signal x _ dc4, carrying out eighth frequency spectrum shifting on the filtered signal, moving the filtered signal back to a second CW interference scrambling point, namely moving the output signal x _ dc4 back to f_cw1After the output signal x _ dc4 is shifted by the eighth frequency spectrum, the output signal x _ ddc7 is output to obtain the second path of CW interference component. The fourth path of frequency spectrum shifting processing is carried out on the second-stage output signal to obtain the frequency f in the output signal x _ mux4_cw1The second path of CW interference component.

In some embodiments, the outputs of the first path of CW interference components and the second path of CW interference components are selectively controlled by controlling the fifth configuration signal to be active or inactive. Wherein the fifth configuration signal includes a fifth configuration sub-signal and a sixth configuration sub-signal.

For example, by controlling the fifth configuration sub-signal to be active or inactive, the output signal x _ mux5 of the seventh selector is controlled to be the signal x _ ddc5 or the signal 0, when the fifth configuration sub-signal is active, the output signal x _ mux5 is equal to 0, that is, the output signal is 0 after the third path of spectrum shifting processing, or, when the fifth configuration sub-signal is inactive, the output signal x _ mux5 is equal to x _ ddc5, that is, the first path of CW interference component x _ ddc5 is output after the third path of spectrum shifting processing.

By controlling the sixth configuration sub-signal to be active or inactive, the output signal x _ mux6 of the eighth selector is controlled to be the signal x _ ddc7 or the signal 0, when the sixth configuration sub-signal is active, the output signal x _ mux6 is equal to 0, that is, the output signal is 0 after the fourth path of spectrum shifting processing, or, when the sixth configuration sub-signal is inactive, the output signal x _ mux6 is equal to x _ ddc7, that is, the output signal x _ ddc7 after the fourth path of spectrum shifting processing is output. The output signal x _ mux5 and the output signal x _ mux6 are processed by a fourth arithmetic unit and then subjected to addition operation to obtain an output signal x _ add2, the time delay signals of the output signal x _ add2 and the second-stage output signal x _ mux4 are processed by a fifth arithmetic unit and then subjected to subtraction operation, namely the output signal x _ add2 is subtracted from the time delay signal of the second-stage output signal x _ mux4 to obtain an output signal x _ sub2, and the output signal x _ sub2 is processed by a selector to output a signal x _ mux 7.

In some embodiments, the output signal of the output signal x _ mux7 of the sixth selector is controlled to be the second-stage output signal x _ mux4 or the signal after the CW interference signal is removed by controlling the activation or deactivation of the fourth configuration signal, when the fourth configuration signal is activated, the second-stage output signal is used as the third-stage output signal, that is, the third-stage output signal x _ mux7 is x _ mux4, or when the fourth configuration signal is deactivated, the signal after the CW interference signal is removed is used as the third-stage output signal, that is, the output signal x _ mux7 is x _ sub2, and the third-stage output signal is obtained by performing the third-stage interference removal processing on the second-stage output signal x _ mux 4. When the second-stage output signal is subjected to time delay processing, the time delay is 7 symbols, the time delay when the frequency spectrum shifting processing is carried out is 3 symbols, and the time delay when the filtering is carried out is 1 symbol.

In some embodiments, the final output signal is selectively controlled by controlling the sixth configuration signal, and the input signal or the third stage output signal is selectively controlled as the final output signal according to the sixth configuration signal.

For example, when the sixth configuration signal is active, the input signal x is output as the final output signal, and the output signal y is equal to x, that is, no interference removal is performed on the input signal, or when the sixth configuration signal is inactive, the third-stage output signal x _ mux7 is output as the final output signal, that is, the output signal y is equal to x _ mux7, and the input signal with interference removed is obtained by performing spur interference removal on the input signal x.

In some embodiments, the spectrum shifting process and the filtering process of the input signal x are exemplified for removing the spurs interference signal in the input signal x, for example, when the second stage interference removal process is performed, the input signal x enters the first end of the first multiplier, and,normalization of interference bins, e.g., -f_hdmi0/f_sNormalization of interference frequency points, and obtaining-f_hdmi1/f_sThe normalized value of the interference frequency point enters a first input end of a first adder, is divided into two paths after being processed by the first adder, and one path reaches a first Z path through the first adder^-1Logic cell, first Z^-1The logic unit is a device capable of realizing Z conversion, and the normalization value of the interference frequency point is processed by the first Z^-1The logic unit processes the signal and the update step length, and then enters the second end of the first adder again, and the other route enters the second end of the first adder through the first limit logic unit by the first adder, the first LUT unit is a sine function and cosine function lookup Table, the signal enters the second end of the first multiplier after being processed by the first LUT unit, the input signal x is processed by each unit and the arithmetic unit, the output signal such as x _ ddc0 is output, the signal x _ ddc0 is filtered, the signal x _ ddc0 enters the first end of the second adder, the signal enters the second multiplier after being processed by the second adder for processing, one end of the second multiplier receives the output signal of the second adder, the other end receives the update step length, the second multiplier processes the input signal and the update step length, the signal enters the first end of the third adder, the signal is divided into two paths by the third adder, one path enters a second limit logic unit, and the other path enters a second Z^-1Logic cells, signals passing through the second Z^-1The logic unit is divided into two paths, one path enters the second end of the third adder, the other path enters the third limiting logic unit and reaches the second end of the second adder through the third limiting logic unit, the signal is processed by each unit and the arithmetic unit and then is subjected to frequency spectrum moving processing again, the signal passing through the second limiting logic unit enters the first end of the third multiplier, the normalized value of the interference frequency point enters the first end of the fourth adder and is divided into two paths after being processed by the fourth adder, the other path enters the fourth limiting logic unit, and the other path enters the third Z limiting logic unit^-1The logic unit enters the fourth adder again, enters the second LUT unit after being processed by the fourth limit logic unit, enters the second end of the third multiplier through the second LUT unit, and outputs a signal subjected to spectrum shifting processing and filtering processingE.g., x _ ddc1, to carry the signal to dc.

When the third-level interference removal processing is performed on the input signal, the input signal is subjected to spectrum shifting processing, and the first input end of the adder acquires the normalized value of the interference frequency point, for example, acquires-f_cw0/f_sNormalization of interference frequency points, and obtaining-f_cw1/f_sAnd (3) the normalized value of the interference frequency point is processed by each unit and the algorithm processor, and then the signal is moved to a direct current position. In an embodiment, α is the update step size, the value of which is register configurable.

In summary, according to the method for removing spurs interference in a WIFI system in the embodiment of the present invention, by sequentially performing multi-stage spurs interference removal processing on an input signal in a time domain, that is, removing dc offset interference, HDMI interference, and CW interference in the input signal in the time domain, compared with processing the input signal in a frequency domain, the method can only eliminate a frequency response at an interference point.

After the spur interference signal in the WIFI system is removed by the device for removing the spur interference of the WIFI system, the effect of removing the interference signal by the device is verified through system simulation, the simulation result shows that the performance of the receiver is obviously improved after the spur interference signal is removed, and the sensitivity of the receiver is improved by 7.1dB for 80M signal bandwidth; for a 40M signal bandwidth, the receiver sensitivity is improved by 12.4dB, and for a 20M signal bandwidth, the receiver sensitivity is improved by 1.2 dB.

The system modeling and simulation process is described in detail below.

For example, the WIFI TX module generates a normalized OFDM signal, and then obtains an adjustment factor of the signal according to a noise floor and an added signal-to-noise ratio, where the calculation of the noise floor is related to a noise coefficient and a filter bandwidth, and the noise coefficient and the filter bandwidth are brought into a calculation formula of the noise floor at a standard temperature, so as to obtain noise floor values under different parameters. And adjusting the size of the output OFDM signal according to the obtained signal adjustment factor, and collecting a noise source by a sampling chip module, wherein the collected noise source comprises DC and CW spur interference signals, and a pure noise source is obtained after high-order narrow-band filtering. Then, the energy of a pure noise signal is calculated through a pure noise source module, then a noise adjusting factor is obtained according to a noise substrate, pure noise output by the pure noise source module and noise containing DC and CW spur interference signals output by a sampling chip module are adjusted according to the obtained noise adjusting factor, finally, OFDM signals and the noise signals are added to obtain output signals, then, the output signals are subjected to gain dynamic adjustment through automatic gain control, sequentially enter a first filtering module, an RX IQ imbalance correction module and a second filtering module, then pass through a device 4 for removing spur interference of a WIFI system, and finally are sent to a digital front-end module. The RX IQ imbalance correction module is used for correcting IQ imbalance of the receiver, and when the filtering module carries out filtering processing on input signals, the filtering module carries out processing on the input signals with different sampling rates according to different models of the filtering module.

Two kinds of data of 20M, 40M and 80M bandwidth WIFI signals under different noises, such as pure noise and noise with DC and CW, are given below, respectively, and the sensitivity simulation results of per < ═ 0.1 when the apparatus for removing spur interference of the WIFI system is turned on and off are shown in table 3.

TABLE 3

TABLE 4

Table 3 shows the values of the parameters when the apparatus for removing spurs interference of the WIFI system is turned on and off at different bandwidths in pure noise. Table 4 is the values of the respective parameters when the device for removing the spur interference of the WIFI system is turned on and off when the noise includes DC and CW interference.

As can be seen from table 3, for the noise source without spurr interference, turning on the apparatus for removing spurr interference of the WIFI system has no loss of zero sensitivity of the receiver relative to turning off the apparatus for removing spurr interference of the WIFI system, and as can be seen from table 4, for the noise source with spurr interference, turning on the apparatus for removing spurr interference of the WIFI system improves the sensitivity of the receiver by 7.1dB for 80M signal bandwidth relative to turning off the apparatus for removing spurr interference of the WIFI system; for a 40M signal bandwidth, the receiver sensitivity is improved by 12.4dB, and for a 20M signal bandwidth, the receiver sensitivity is improved by 1.2 dB.

The schematic diagram of the simulated frequency spectrum after the interference removal is carried out by adopting the device for removing the spurr interference of the WIFI system is as follows.

Fig. 7 is a schematic diagram of noise with DC interference and CW interference collected at 20M bandwidth according to an embodiment of the present invention, and fig. 7a shows a time domain waveform of a lower band interference signal of a 20M bandwidth signal; FIG. 7b shows a schematic diagram of the frequency domain response with an interfering signal; as can be seen from fig. 7b, the two interference signals of CW are-25M and 15M, respectively.

Fig. 8 is a diagram illustrating noise with DC interference and CW interference collected at 40M bandwidth according to an embodiment of the present invention. FIG. 8a shows a time domain waveform of a lower band interference signal of a 40M bandwidth signal; FIG. 8b shows a schematic diagram of the frequency domain response with an interfering signal; as can be seen from fig. 8b, the two interference signals of CW are-35M and 5M, respectively.

Fig. 9 is a diagram illustrating noise with DC interference and CW interference collected at a bandwidth of 80M according to an embodiment of the present invention. FIG. 9a shows a time domain waveform of a lower band interference signal of an 80M bandwidth signal; FIG. 9b shows a schematic diagram of the frequency domain response with an interfering signal; as can be seen from fig. 9b, the two interfering signals of CW are-15M and 25M, respectively.

Fig. 10 is a schematic diagram of a time-domain waveform and a frequency-domain response of a DC interference signal estimated by a spurr jammer in an 80M bandwidth-removed WIFI system according to an embodiment of the present invention. FIG. 10a shows a time domain waveform of a DC interference signal; fig. 10b shows the frequency domain response of the DC interference signal.

Fig. 11 is a schematic diagram of a time-domain waveform and a frequency-domain response of a CW interference signal estimated by an apparatus for removing spurs interference in a WIFI system with a bandwidth of 80M according to an embodiment of the present invention. Fig. 11a shows a time domain waveform of a CW interference signal; fig. 11b shows the frequency domain response of a CW interference signal.

Fig. 12 is a waveform diagram illustrating a time domain waveform and a frequency domain response of an input signal of an apparatus with a bandwidth of 80M for removing spurs interference of a WIFI system according to an embodiment of the present invention. FIG. 12a shows a time domain waveform of an input signal; fig. 12b shows the frequency domain response of the input signal.

Fig. 13 is a waveform diagram illustrating a time-domain waveform and a frequency-domain response of an output signal of an apparatus with a bandwidth of 80M for removing spur interference of a WIFI system according to an embodiment of the present invention. FIG. 13a shows a time domain waveform of an input signal; fig. 13b shows the frequency domain response of the input signal. As can be seen from fig. 13, after the input signal with the DC interference and the CW interference is filtered by the apparatus for removing the spur interference of the WIFI system, the interference signal can be effectively removed, and the influence of the interference signal on the performance of the receiver is eliminated.

In order to achieve the above object, a second aspect of the present invention provides a non-transitory computer storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method for removing spurs interference of a WIFI system mentioned in the above embodiment.

A broadband system according to an embodiment of the third aspect of the present invention will be described with reference to the drawings.

Fig. 14 is a block diagram of a broadband system according to an embodiment of the present invention, and as shown in fig. 14, a broadband system 1 according to an embodiment of the present invention includes a receiver 2 and a device 3 for removing spurr interference of a WIFI system, where the device 3 for removing spurr interference of a WIFI system is configured to execute the method for removing spurr interference of a WIFI system to remove spurr interference of a signal received by the receiver.

In an embodiment, the apparatus 3 for removing the spurt interference of the WIFI system can be implemented by a hardware structure, for example, by a structural apparatus shown in fig. 2, and can also execute the method for removing the spurt interference of the WIFI system mentioned in the above embodiment by computer software to remove the spurt interference of the signal received by the receiver.

According to the broadband system provided by the embodiment of the invention, the device 3 for removing the spurs interference of the WIFI system is used for removing the spurs interference in the input signal, so that the influence of the spurs interference signal on the performance of the receiver can be better eliminated, and the problem that the receiver 2 cannot work normally due to the overlarge spurs interference signal is avoided.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for removing spurs interference of a WIFI system is characterized by comprising the following steps:

acquiring an input signal;

in a time domain, the input signal is sequentially subjected to multi-stage spur interference removal processing, wherein the spur interference at least comprises direct current offset interference, HDMI interference and CW interference.

2. The method for removing spurs interference of a WIFI system according to claim 1, wherein the input signal is sequentially subjected to multi-stage spurs interference removing processing in a time domain, and the method comprises the following steps:

obtaining a direct current offset interference signal in the input signal and a time delay signal of the input signal;

removing the DC offset interference signal from the time delay signal of the input signal;

and selectively taking one of the time delay signal of the input signal, the signal after the direct current offset interference signal is removed and the input signal as a first-stage output signal according to a first configuration signal.

3. The method for removing spurr interference in a WIFI system according to claim 2, wherein selectively using one of the time-delayed signal of the input signal, the signal after removing the dc offset interference signal, and the input signal as the first stage output signal according to a first configuration signal comprises:

the first configuration signal comprises a first configuration sub-signal and a second configuration sub-signal;

the first configuration sub-signal is active, taking the input signal as the first stage output signal;

the first configuration sub-signal is invalid and the second configuration sub-signal is valid, and a time delay signal of the input signal is used as the first-stage output signal;

and the first configuration sub-signal and the second configuration sub-signal are both invalid, and the signal without the DC offset interference signal is used as the first-stage output signal.

4. The method for removing spurs interference of a WIFI system according to claim 1, wherein the input signal is sequentially subjected to multi-stage spurs interference removing processing in a time domain, and the method comprises the following steps:

carrying out frequency spectrum shifting on the input signal according to the frequency point of the spur interference signal;

filtering the signal after the frequency spectrum shifting to obtain a spurs interference signal;

moving the spectrum of the spurs interference signal back to the original frequency;

and removing the spur interference signal from the time delay signal of the input signal.

5. The method for removing spurs interference of a WIFI system according to claim 2 or 3, wherein the input signal is sequentially subjected to multi-stage spurs interference removing processing in a time domain, further comprising:

respectively carrying out first path of frequency spectrum shifting processing and second path of frequency spectrum shifting processing on the first-stage output signal according to the HDMI interference point so as to obtain a first path of HDMI interference component and a second path of HDMI interference component;

adding the first path of HDMI interference component and the second path of HDMI interference component to obtain an HDMI interference signal;

obtaining a time delay signal of the first-stage output signal, and removing the HDMI interference signal from the time delay signal of the first-stage output signal to obtain a signal without the HDMI interference signal;

and selectively taking the signal subjected to the removal of the HDMI interference signal or the first-stage output signal as a second-stage output signal according to a second configuration signal.

6. The method of claim 5, wherein the first path of frequency spectrum shifting processing and the second path of frequency spectrum shifting processing are respectively performed on the first-stage output signal according to the HDMI interference frequency point to obtain a first path of HDMI interference component and a second path of HDMI interference component, and the method includes:

carrying out first frequency spectrum shifting on the first-stage output signal according to a first HDMI interference scrambling point, filtering the signal subjected to the first frequency spectrum shifting, carrying out second frequency spectrum shifting on the filtered signal, and shifting the filtered signal back to the first HDMI interference scrambling point to obtain a first path of HDMI interference component;

and carrying out first frequency spectrum shifting on the first-stage output signal according to a second HDMI interference frequency point, filtering the signal subjected to the first frequency spectrum shifting, carrying out second frequency spectrum shifting on the filtered signal, and shifting the filtered signal back to the second HDMI interference frequency point to obtain a second path of HDMI interference component.

7. The method of claim 6, wherein after obtaining the first path of HDMI interference component and the second path of HDMI interference component, the method further comprises:

and selectively controlling the output of the first path of HDMI interference component and the second path of HDMI interference component according to a third configuration signal.

8. The method of claim 7, wherein selectively controlling the output of the first path of HDMI interference component and the output of the second path of HDMI interference component according to a third configuration signal comprises:

the third configuration signal comprises a third configuration sub-signal and a fourth configuration sub-signal;

when the third configuration sub-signal is valid, the output of the first path of frequency spectrum after moving processing is 0, or when the third configuration sub-signal is invalid, the first path of frequency spectrum after moving processing is output of the first path of HDMI interference component;

and when the fourth configuration sub-signal is valid, the output of the second path of frequency spectrum after the shift processing is 0, or when the fourth configuration sub-signal is invalid, the output of the second path of HDMI interference component after the shift processing of the second path of frequency spectrum.

9. The method for removing spurr interference in a WIFI system according to claim 5, wherein selectively using the HDMI interference signal removed signal or the first stage output signal as a second stage output signal according to a second configuration signal comprises:

when the second configuration signal is valid, taking the first-stage output signal as the second-stage output signal;

or when the second configuration signal is invalid, taking the signal without the HDMI interference signal as the second-stage output signal.

10. The method for removing spurs interference of a WIFI system according to claim 5, wherein the input signal is sequentially processed by multi-stage spurs interference removal in time domain, further comprising:

respectively carrying out third path frequency spectrum shifting processing and fourth path frequency spectrum shifting processing on the second-level output signal according to the CW interference frequency point so as to obtain a first path of CW interference component and a second path of CW interference component;

adding the first path of CW interference component and the second path of CW interference component to obtain a CW interference signal;

obtaining a time delay signal of the second-stage output signal, and removing the CW interference signal from the time delay signal of the second-stage output signal to obtain a signal with the CW interference signal removed;

and selectively taking the signal after the CW interference signal is removed or the second-stage output signal as a third-stage output signal according to a fourth configuration signal.

11. The method of claim 10, wherein the third and fourth spectrum shifting processes are performed on the second-level output signal according to the CW interference frequency point to obtain the first and second paths of CW interference components, and the method includes:

carrying out first frequency spectrum shifting on the second-level output signal according to a first CW interference frequency point, filtering the signal after the first frequency spectrum shifting, carrying out second frequency spectrum shifting on the filtered signal, and shifting the filtered signal back to the first CW interference frequency point to obtain a first path of CW interference component;

and carrying out first frequency spectrum shifting on the second-level output signal according to a second CW interference frequency point, filtering the signal after the first frequency spectrum shifting, carrying out second frequency spectrum shifting on the filtered signal, and shifting the filtered signal back to the second CW interference frequency point to obtain a second path of CW interference components.

12. The method of claim 11, wherein after obtaining the first path of CW interference component and the second path of CW interference component, the method further comprises:

and selectively controlling the output of the first path of CW interference component and the second path of CW interference component according to a fifth configuration signal.

13. The method of claim 12, wherein selectively controlling the outputs of the first channel of CW interference component and the second channel of CW interference component according to a fifth configuration signal comprises:

the fifth configuration signal comprises a fifth configuration sub-signal and a sixth configuration sub-signal;

when the fifth configuration sub-signal is valid, the output of the third path of frequency spectrum after moving processing is 0, or when the fifth configuration sub-signal is invalid, the output of the first path of CW interference component after moving processing of the third path of frequency spectrum;

and when the sixth configuration sub-signal is valid, the fourth path of frequency spectrum is output as 0 after being shifted, or when the sixth configuration sub-signal is invalid, the fourth path of frequency spectrum is output as the second path of CW interference component after being shifted.

14. The method of claim 10, wherein selectively providing the CW interference signal-removed signal or the second-stage output signal as a third-stage output signal according to a fourth configuration signal comprises:

when the fourth configuration signal is valid, taking the second-stage output signal as the third-stage output signal;

or, when the fourth configuration signal is invalid, taking the signal without the CW interference signal as the third-stage output signal.

15. The method for removing spurr interference of a WIFI system according to claim 14, further comprising:

selectively controlling the input signal or the third stage output signal as a final output signal according to a sixth configuration signal.

16. The method of claim 15, wherein selectively controlling the input signal or the third stage output signal as the final output signal according to a sixth configuration signal comprises:

the sixth configuration signal is active, outputting the input signal as the final output signal;

or, the sixth configuration signal is invalid, and the third-stage output signal is output as the final output signal.

17. A non-transitory computer storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method for removing spur interference of a WIFI system of any one of claims 1-16.

18. A broadband system, comprising:

a receiver;

means for removing the spur interference of the WIFI system, the means for removing the spur interference of the WIFI system is used to execute the method for removing the spur interference of the WIFI system of any of claims 1-16 to remove the spur interference of the signal received by the receiver.