CN115133940A - Method and device for inhibiting Bluetooth interference in WiFi signal and signal receiving and transmitting device - Google Patents
Method and device for inhibiting Bluetooth interference in WiFi signal and signal receiving and transmitting device Download PDFInfo
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- CN115133940A CN115133940A CN202210749940.5A CN202210749940A CN115133940A CN 115133940 A CN115133940 A CN 115133940A CN 202210749940 A CN202210749940 A CN 202210749940A CN 115133940 A CN115133940 A CN 115133940A
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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
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
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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
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
- H04B1/1036—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal with automatic suppression of narrow band noise or interference, e.g. by using tuneable notch filters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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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
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
- H04B2001/1063—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal using a notch filter
Abstract
The invention provides a method and a device for inhibiting Bluetooth interference in a WiFi signal and a signal transceiving device, wherein the method comprises the following steps: carrying out trap wave processing on the in-band time domain signal; performing gain processing on the time domain signal subjected to the notch processing; converting the time domain signal after gain processing into a frequency domain signal; acquiring interfered subcarriers in the frequency domain signal; and carrying out power scaling processing on the interfered subcarriers. The invention is used for reducing the adverse effect of the Bluetooth interference signal on the WiFi signal.
Description
Technical Field
The invention relates to the field of wireless networks, in particular to a method and a device for inhibiting Bluetooth interference in a WiFi signal and a signal receiving and transmitting device.
Background
With the development of wireless communication technology, frequency spectrum resources are more and more tense, communication on an unauthorized frequency band becomes abnormally crowded, an ISM frequency band is used as the unauthorized frequency band, the frequency band is used for having application-free convenience, and signals such as Bluetooth, ZigBee, WiFi and the like are all transmitted in the frequency band. Therefore, signal interference is easy to occur between each other, for example, when some communication device includes bluetooth, ZigBee, WiFi, etc., it is easy to be interfered by other devices when communicating, so that the system throughput is limited and the user experience is affected.
With the rapid development of the internet of things industry, scenes of coexistence of multiple communication technologies are more and more, and especially, multiple modules exist in one multimode terminal: i.e. the WiFi module and the bluetooth module or other modules coexist. Under such a scenario, when the WiFi module is working, how to suppress the interference of other modules to the WiFi becomes very important. Especially when the WiFi device coexists with devices such as bluetooth, the WiFi signal is interfered by the bluetooth signal, and is difficult to be suppressed, the reason for this is mainly that: firstly, compared with WiFi equipment, the Bluetooth transmitting power is larger; secondly, different from other data channels, the broadcast channel of the bluetooth device uses a fixed channel to transmit information, and when the isolation between the WiFi module and the bluetooth module is not ideal, the bluetooth broadcast channel inevitably falls into the transmission channel of the WiFi signal, and the power of the bluetooth interference signal is usually much greater than that of the WiFi signal. Therefore, if the bluetooth interference signal in the WiFi signal is not suppressed, the system throughput of the WiFi signal is severely reduced, resulting in a reduction in the user experience.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention provides a method, an apparatus and a signal transceiver for suppressing bluetooth interference in a WiFi signal, so as to reduce the adverse effect of the bluetooth interference signal on the WiFi signal.
To achieve the above and other related objects, the present invention provides a method for suppressing bluetooth interference in a WiFi signal, comprising:
carrying out trap wave processing on the in-band time domain signal;
performing gain processing on the time domain signal subjected to the notch processing;
converting the time domain signal after gain processing into a frequency domain signal;
acquiring an interfered subcarrier in the frequency domain signal;
and carrying out power scaling processing on the interfered subcarriers.
In an embodiment of the present invention, the notching processing the in-band time domain signal includes: carrying out frequency spectrum shifting on an interference signal to enable the center frequency of the interference signal to be located at a relative zero frequency position; then carrying out recursive filtering; and carrying out spectrum shift on the recursively filtered signal, so that the signal frequency at the current relative zero-frequency position is located at the central frequency position of the interference signal.
In an embodiment of the present invention, acquiring an interfered subcarrier in the frequency domain signal includes: and acquiring the initial position of the interfered subcarrier, and acquiring the termination position of the interfered subcarrier according to the bandwidth of the Bluetooth interference signal.
In an embodiment of the present invention, the performing power scaling processing on the interfered subcarrier includes: obtaining a scaling factor according to the strength of the interference signal; multiplying the interfered subcarrier by the scaling factor.
In one embodiment of the present invention, the method further includes: and carrying out frequency domain equalization processing on the signal, and then carrying out soft decision decoding.
In an embodiment of the present invention, converting the time domain signal after the gain processing into a frequency domain signal includes: and carrying out Fourier transform on the time domain signal to obtain the frequency domain signal.
The invention also provides a device for inhibiting the Bluetooth interference in the WiFi signal, which comprises the following components: the device comprises a notch processing module, a gain processing module, a frequency domain conversion module, an interfered subcarrier acquiring module and an interfered subcarrier scaling module. The notching processing module is used for carrying out notching processing on the in-band time domain signal; the gain processing module is used for performing gain processing on the time domain signal; the frequency domain conversion module is used for converting the time domain signal after the gain processing into a frequency domain signal; the obtaining interfered subcarrier module is used for obtaining an interfered subcarrier in the frequency domain signal; and the interfered subcarrier scaling module is used for carrying out power scaling processing on the interfered subcarriers.
In an embodiment of the present invention, the apparatus further includes a storage module, configured to store the relevant data. The relevant data includes: the center frequency and occupied bandwidth of the bluetooth interference signal, the center frequency of the WiFi signal, the recursive filter coefficients, the interfered subcarrier starting position, and the scaling factor.
In one embodiment of the present invention, the notching processing module includes: the frequency spectrum shifting circuit is used for shifting frequency spectrum; and a recursive filter for performing recursive filtering. The frequency spectrum shifting circuit can shift the central frequency of the interference signal to a relative zero frequency position, and can also shift the signal frequency of the current relative zero frequency position to the central frequency position of the interference signal.
The invention also provides a signal transceiver, and the device for inhibiting the Bluetooth interference in the WiFi signal is arranged in the signal transceiver.
In an embodiment of the present invention, the signal transceiver further includes: the device comprises a radio frequency receiving module, an analog domain processing module, a digital front end, a first low-pass filter, a channel estimation module and an output module.
The method and the device for inhibiting the Bluetooth interference in the WiFi signal can realize the following technical effects:
after the time domain signal is subjected to trap processing, the power of the in-band Bluetooth interference signal is greatly reduced, after gain processing, the WiFi signal amplitude is close to the full range, and the loss of the subsequent digital signal processing precision is reduced to the minimum.
And further interference suppression is carried out in a frequency domain, the Euclidean distance can be reduced by the strategy of multiplying the interfered subcarrier by scale, and the soft-decision decoding effect is better.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flowchart of a method for suppressing Bluetooth interference in a WiFi signal according to the present invention;
fig. 2 is a signal processing flow when the WiFi signal bandwidth is 20M;
FIG. 3 is a signal processing flow when the bandwidth of the WiFi signal is 40M;
FIG. 4 is a main flow diagram of the time domain processing stage;
fig. 5 is a main flow chart of the frequency domain processing stage.
Description of the element reference numerals
1. A trapped wave processing module; 2. a gain processing module; 3. a frequency domain conversion module; 4. an interfered subcarrier scaling module; 5. a frame header analyzing module; 6. a frequency domain equalization module; 7. a soft decision decoding module; 8. a first low-pass filter; 9. a data stream selection module; 10. a radio frequency receiving module; 11. an analog domain processing module; 12. a digital front end; 13. a second low-pass filter; 14. a channel estimation module; 15. an output module; 16. and obtaining an interfered subcarrier module.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. It is also to be understood that the terminology used in the examples is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention. Test methods in which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under conditions recommended by the respective manufacturers.
It should be understood that the terms "upper", "lower", "left", "right", "middle" and "a" used herein are used for descriptive purposes only and are not intended to limit the scope of the present invention, and that the relative relationship between the terms and the terms should be construed as the scope of the present invention without substantial change in the technical spirit.
Referring to fig. 1 to 5, the present invention provides a method for suppressing bluetooth interference in a WiFi signal, including:
carrying out notch processing on the in-band time domain signal: carrying out frequency spectrum shifting on the time domain signal to enable the center frequency of the interference signal to be located at a relative zero frequency position, wherein the relative zero frequency position refers to the center frequency position of the WiFi signal in the time domain signal before notch processing, and then carrying out recursive filtering (namely IIR filtering); the recursively filtered signal is again subjected to spectrum shifting so that the signal frequency at the current relative zero frequency position is located at the center frequency position of the interference signal in the time domain signal before the notch processing.
In this step, the center frequency f of the interference signal is read out from the register a (since the interference signal is a Bluetooth signal, its center frequency is known), a WiFi signal center frequency f b And interference signal center frequency f a Relative WiFi Signal center frequency f b Frequency point distance f c . Wherein f is c ＝f a -f b . Shift the frequency spectrum f c And the center frequency of the interference signal is enabled to be at a position of relative zero frequency.
After the first time of frequency spectrum shifting, a group of filter coefficients are selected from the register to carry out IIR filtering, a plurality of groups of IIR filter coefficients are stored in the register, and dynamic adjustment is carried out according to the power of the interference signal. Thereby achieving trapping. Carrying out second frequency spectrum shift on the received signal after time domain notch to shift the signal at the position of relative zero frequency to the original position, namely relative f c To (3). Relative to f c Means a position f relative to the relative zero point c 。
The notching processing step further includes: and performing low-pass filtering on the time domain signal subjected to the second time of frequency spectrum shifting, and performing frame header analysis after the low-pass filtering. When the bandwidth of the analyzed signal is 40M, data stream selection is required. In this step, when the bandwidth of the WiFi signal is 40M, the low pass filtering includes two layers of low pass filtering, 40M low pass filtering and 20M low pass filtering respectively.
And then, performing gain processing on the time domain signal, and adjusting the power of the in-band time domain signal to a reasonable range, wherein the reasonable range is a feasible range which can be allowed by the power of the signal on the premise of not interfering with the subsequent steps. The gain-processed input signal comprises: the signal after low-pass filtering processing and the signal after frame head analysis. When the bandwidth of the WiFi signal is 40M, the signal after the frame header parsing needs to perform data stream selection before performing gain processing.
And performing Fourier transform on the time domain signal after the gain processing to convert the time domain signal into a frequency domain signal.
And acquiring the initial position of the interfered subcarrier from the register, and acquiring the termination position of the interfered subcarrier according to the bandwidth of the Bluetooth interference signal, thereby acquiring the complete interfered subcarrier. Selecting and determining a scaling factor according to the strength of the interference signal; and multiplying the interfered subcarrier by the scaling factor so as to realize the scaling processing of the interfered subcarrier. The greater the strength of the interfering signal, the smaller the scaling factor.
And after the power scaling processing is carried out on the interfered subcarrier, the frequency domain equalization processing is carried out on the frequency domain signal.
Then, soft decision decoding is carried out and output.
The method for inhibiting the Bluetooth interference in the WiFi signal can realize the following technical effects:
after the time domain signal is subjected to trap processing, the power of the in-band Bluetooth interference signal is greatly reduced, after gain processing, the amplitude of the WiFi signal is close to the full range, and the loss of the processing precision of the subsequent digital signal is reduced to the minimum. Meanwhile, by taking an 802.11ax protocol as an example, pre-modulated fields adopt BPSK (binary phase Shift keying) which is the lowest-order modulation mode, the anti-interference capability is strong, compared with the DATA part, the interference suppression of a time domain IIR (infinite impulse response) filtering method is enough, and at the moment, an interference suppression method does not need to be further adopted in a frequency domain, so that the calculation complexity is reduced.
Soft decision decoding uses euclidean distance as a metric. However, the interfered subcarriers in the frequency domain are severely damaged, and thus the euclidean distance after demapping is large, thereby causing error propagation of soft-decision decoding. Interference suppression is further carried out in a frequency domain, the Euclidean distance can be effectively reduced by the strategy of multiplying the interfered subcarrier by scale, and the soft-decision decoding effect is better. Therefore, the problem that the data in the modulated fields adopt high-order QAM and are weak in anti-interference capacity is solved.
Referring to fig. 2 and fig. 3, the present invention further provides an apparatus for suppressing bluetooth interference in a WiFi signal, including: the device comprises a notch processing module 1, a gain processing module 2, a frequency domain conversion module 3, an interfered subcarrier obtaining module 16 and an interfered subcarrier scaling module 4. The notching processing module 1 is used for notching the in-band time domain signal; the gain processing module 2 is used for performing gain processing on the time domain signal; the frequency domain conversion module 3 is used for converting the time domain signal after the gain processing into a frequency domain signal; the obtaining interfered subcarrier module 16 is configured to obtain an interfered subcarrier from the frequency domain signal; the interfered subcarrier scaling module 4 is configured to perform power scaling processing on the interfered subcarriers.
The apparatus for suppressing bluetooth interference in a WiFi signal further includes a storage module (not shown) for storing relevant data. The memory module includes a register. The relevant data includes: the center frequency of the bluetooth interference signal, the bandwidth of the bluetooth interference signal, the center frequency of the WiFi signal, the recursive filter coefficients, the interfered subcarrier starting position, and the scaling factor.
The notching module 1 includes: the frequency spectrum shifting circuit is used for shifting frequency spectrum; and a recursive filter for performing recursive filtering. The frequency spectrum shifting circuit can shift the central frequency of the interference signal to a relative zero frequency position, and can also shift the signal frequency of the current relative zero frequency position to the central frequency position of the interference signal.
Referring to fig. 2 and fig. 3, the apparatus for suppressing bluetooth interference in a WiFi signal further includes a frame header parsing module 5, a frequency domain equalizing module 6, a soft decision decoding module 7, and a first low pass filter 8. And the frame header analysis module 5 is used for analyzing frame header data. The frequency domain equalization module 6 is configured to perform frequency domain equalization processing. The soft decision decoding module 7 is configured to perform soft decision decoding. The first Low pass filter is LPF20 (where LPF is Low-pass filter, LPF20 corresponds to WiFi signal bandwidth of 20M).
Referring to fig. 3, in an embodiment of the present invention, the apparatus for suppressing bluetooth interference in a WiFi signal further includes a second low pass filter 13 and a data stream selection module 9. Where the second low pass filter 13 is LPF40 (corresponding to a WiFi signal bandwidth of 40M).
The invention also provides a signal transceiver, and the device for inhibiting the Bluetooth interference in the WiFi signal is arranged in the signal transceiver.
Referring to fig. 2 and fig. 3, in an embodiment of the present invention, the signal transceiver further includes: the system comprises a radio frequency receiving module 10, an analog domain processing module 11, a digital front end 12, a channel estimation module 14 and an output module 15. The rf receiving module 10 is configured to receive an analog signal and transmit the analog signal to the analog domain processing module. The analog domain processing module 11 is used for performing analog processing, such as analog gain and mixing processing, on the analog signal. The digital front end 12 performs filtering and down-sampling processing to make the sampling rate of the received signal 2 times of the signal bandwidth; the channel estimation module 14 is used for channel estimation. The output module 15 is used for outputting signals.
Referring to fig. 2 to 5, the operation process of the signal transceiver is as follows:
time domain processing stage
Analog signals received by a radio frequency receiving end are processed in an analog domain, the amplitude of the received signals is adjusted to a reasonable range, and then filtering and downsampling processing are carried out in a DFE (digital front end) module to enable the sampling rate of the received signals to be 2 times of the bandwidth of the signals.
Reading out the frequency point distance of the known interference signal center frequency relative to the WiFi signal center frequency from the register and recording as f c Frequency spectrum shifting f c The center frequency of the interference signal is brought to the zero frequency position.
And selecting a group of filter coefficients from the register to carry out IIR filtering, storing a plurality of groups of IIR filter coefficients in the register, and dynamically adjusting according to the power of the interference signal.
The frequency spectrum of the received signal after the time domain notch is shifted to the original position fc from zero frequency.
Analyzing the frame header, analyzing the transmission mode of the received signal, and selecting data stream;
and performing gain control processing to adjust the power of the in-band signal to a reasonable range.
Frequency domain processing stage
Signals carrying data information received by the baseband are subjected to FFT (namely Fourier transform) and are transformed from a time domain to a frequency domain.
And reading the initial position of the interfered subcarrier from the register, and calculating the subscript indication, namely the termination position of the subcarrier of the interfered signal according to the bandwidth of the Bluetooth interference signal.
The interfered subcarrier is multiplied by a scaling factor, the selection of the scaling factor is determined by the strength of the interference signal, and the scaling factor scale can be 0, 0.5 or 0.25 ….
And (4) frequency domain equalization.
And decoding and outputting the soft decision.
The invention reduces the power of in-band interference signals through IIR filtering in time domain signals, and then enables the WiFi signal amplitude to be close to full range through adjusting digital AGC, and simultaneously eliminates partial Bluetooth interference. Meanwhile, error propagation of the interfered subcarrier to soft decision decoding is reduced in a frequency domain. Therefore, the invention effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A method for suppressing bluetooth interference in a WiFi signal, comprising:
carrying out trap wave processing on the in-band time domain signal;
performing gain processing on the time domain signal subjected to the notch processing;
converting the time domain signal after gain processing into a frequency domain signal;
acquiring interfered subcarriers in the frequency domain signal;
and carrying out power scaling processing on the interfered subcarriers.
2. The method of claim 1, wherein the step of notching the in-band time domain signal comprises: carrying out frequency spectrum shifting on the time domain signal to enable the center frequency of the interference signal to be located at a relative zero frequency position; then carrying out recursive filtering; and carrying out spectrum shifting on the time domain signal subjected to recursive filtering, so that the signal frequency at the current relative zero frequency position is positioned at the central frequency position of the interference signal.
3. The method of claim 1, wherein obtaining the interfered subcarrier in the frequency domain signal comprises: and acquiring the initial position of the interfered subcarrier, and acquiring the termination position of the interfered subcarrier according to the bandwidth of the Bluetooth interference signal.
4. The method of claim 3, wherein performing power scaling on the interfered subcarriers comprises: obtaining a scaling factor according to the strength of the interference signal; multiplying the interfered subcarrier by the scaling factor.
5. The method of claim 1, wherein the power scaling the interfered subcarriers further comprises: and carrying out frequency domain equalization processing on the signal, and then carrying out soft decision decoding.
6. The method of claim 1, wherein converting the gain-processed time domain signal into a frequency domain signal comprises: and carrying out Fourier transform on the time domain signal to obtain the frequency domain signal.
7. An apparatus for suppressing bluetooth interference in a WiFi signal, comprising:
the trap wave processing module is used for carrying out trap wave processing on the in-band time domain signal;
the gain processing module is used for carrying out gain processing on the time domain signal subjected to the notch processing;
the frequency domain conversion module is used for converting the time domain signal after the gain processing into a frequency domain signal;
an obtaining interfered subcarrier module, configured to obtain an interfered subcarrier from the frequency domain signal;
and the interfered subcarrier scaling module is used for carrying out power scaling processing on the interfered subcarriers.
8. The apparatus of claim 7, further comprising a storage module configured to store the related data.
9. The apparatus for suppressing bluetooth interference in a WiFi signal of claim 7, wherein the notching module comprises: the frequency spectrum shifting circuit is used for shifting frequency spectrum; and the recursive filter is used for performing recursive filtering.
10. A signal transceiver, characterized in that the signal transceiver is provided with the device for suppressing bluetooth interference in WiFi signals according to any one of claims 7-9.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102404271A (en) * | 2011-11-23 | 2012-04-04 | 广东盛路通信科技股份有限公司 | Device and method for narrowband interference suppression of OFDM (orthogonal frequency division multiplexing) receiver |
| CN102811190A (en) * | 2011-05-31 | 2012-12-05 | 上海明波通信技术股份有限公司 | Suppression method for single-frequency interference in OFDM (Orthogonal Frequency Division Multiplexing) communication system |
| CN102904604A (en) * | 2012-09-10 | 2013-01-30 | 北京大学 | Narrow-band interference suppression method and device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102811190A (en) * | 2011-05-31 | 2012-12-05 | 上海明波通信技术股份有限公司 | Suppression method for single-frequency interference in OFDM (Orthogonal Frequency Division Multiplexing) communication system |
| CN102404271A (en) * | 2011-11-23 | 2012-04-04 | 广东盛路通信科技股份有限公司 | Device and method for narrowband interference suppression of OFDM (orthogonal frequency division multiplexing) receiver |
| CN102904604A (en) * | 2012-09-10 | 2013-01-30 | 北京大学 | Narrow-band interference suppression method and device |
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