Method, apparatus, device, storage medium and program product for eliminating single-tone interference

Abstract

The application relates to the field of electronic communication technology, and provides a single-tone interference elimination method, device, equipment, storage medium and program product.The single-tone interference elimination method comprises the following steps: moving a center frequency point of a received signal to an interference point position through a first frequency shift module, removing a direct current component in the received signal, and obtaining a first signal; using a direct current removal module to configure filter characteristics according to interference intensity and interference bandwidth, so as to eliminate single-tone interference in the first signal and obtain a second signal; performing optimization processing on the second signal to obtain a third signal; and moving the center frequency point of the third signal back to a signal zero frequency position through a second frequency shift module, so as to obtain a final signal after single-tone interference elimination. Through the above method, the interference elimination target can be achieved under the premise of not increasing or only slightly increasing a circuit, and an iterative closed loop processing is not needed, so that the risk of system non-convergence caused by improper parameter configuration is reduced.

Description

Technical Field

[0001] This invention relates to the field of electronic communication technology, and in particular to methods, apparatus, devices, storage media, and program products for eliminating single-tone interference. Background Technology

[0002] In wireless communication systems, radio frequency (RF) units, due to their inherent non-ideal characteristics, are highly likely to generate deterministic interference (spur) when the crystal oscillator clock undergoes frequency multiplication. Once this interference occurs, it affects the amplitude and phase of the received signal. It superimposes on the signal, and its behavior changes with the receiver gain.

[0003] Under certain operating channels, this type of interference can fall within the signal band, leading to a decrease in receiver sensitivity. From the interference's generation mechanism and spectral analysis, it can be seen that the interference has a very narrow bandwidth and can be modeled as a single-tone interference (STO). Its STO frequency can be estimated based on the receiving frequency. As the receiving frequency changes, the STO may appear at different frequency domain locations. Since the interference frequency location can be estimated from the operating channel, interference cancellation typically employs variable-frequency notch filters or iterative cancellation methods in the time domain.

[0004] However, existing technologies have some drawbacks in eliminating single-tone interference. To achieve interference cancellation, a significant amount of additional digital hardware circuitry is required, including a digital oscillator and several units for multiplication, addition, and saturation truncation processing. Interference cancellation modules typically operate in a closed-loop iterative manner, which not only requires complex control mechanisms to prevent system divergence but also necessitates a long convergence time to achieve interference elimination. For example, in short-packet data scenarios, existing interference cancellation techniques are less effective. Summary of the Invention

[0005] This invention provides a method, apparatus, device, storage medium, and program product for eliminating single-tone interference, which solves the problems in the prior art where additional hardware circuitry is required to eliminate single-tone interference and where system divergence risks exist during closed-loop iteration.

[0006] This invention provides a method for eliminating single-tone interference, comprising: moving the center frequency of a received signal to the interference point position using a first frequency shifting module and removing the DC component from the received signal to obtain a first signal; using a DC removal module to configure filter characteristics according to the interference intensity and interference bandwidth to eliminate single-tone interference in the first signal to obtain a second signal; optimizing the second signal to obtain a third signal; and moving the center frequency of the third signal back to the zero-frequency position using a second frequency shifting module to obtain the final signal after eliminating single-tone interference.

[0007] According to a method for eliminating single-tone interference provided by the present invention, a second signal is optimized to obtain a third signal, comprising: downsampling the second signal and then filtering it through a downsampling module to obtain a first intermediate signal; adjusting the gain of the first intermediate signal through a digital automatic gain control module to obtain a second intermediate signal; the second intermediate signal includes an I-channel and a Q-channel; and adjusting the I-channel and Q-channel of the second intermediate signal through an imbalance compensation module to eliminate the amplitude and phase imbalance of the I and Q signals to obtain the third signal.

[0008] According to a method for eliminating single-tone interference provided by the present invention, before the center frequency of the received signal is moved to the interference point position by the first frequency shift module, the method further includes: determining the relative interference frequency point, the frequency shift value of the first frequency shift module, the interference intensity, and the interference bandwidth by the frequency point calculation module according to the current working channel, the current working frequency band, and the intermediate frequency.

[0009] According to the method for eliminating single-tone interference provided by the present invention, the method further includes: obtaining interference intensity data, interference bandwidth data, and working channel data through pre-measurement; organizing the interference intensity data, interference bandwidth data, and working channel data to obtain a working channel interference lookup table; wherein the working channel interference lookup table includes a one-to-one mapping relationship between interference intensity, interference bandwidth, and working channel; and determining the interference intensity and interference bandwidth corresponding to the current working channel from the working channel interference lookup table.

[0010] The method for eliminating single-tone interference provided by the present invention further includes: simultaneously processing the frequency shift and signal DC quantity estimation through a first frequency shift module.

[0011] According to the present invention, a method for eliminating single-tone interference configures filter characteristics based on interference intensity and interference bandwidth, comprising: when the interference intensity is greater than or equal to an interference intensity threshold and the interference bandwidth is less than or equal to an interference bandwidth threshold, determining filter characteristics by a first filtering parameter; when the interference intensity is greater than or equal to an interference intensity threshold and the interference bandwidth is greater than an interference bandwidth threshold, determining filter characteristics by a second filtering parameter; when the interference intensity is less than an interference intensity threshold and the interference bandwidth is less than or equal to an interference bandwidth threshold, determining filter characteristics by a third filtering parameter; and when the interference intensity is less than an interference intensity threshold and the interference bandwidth is greater than an interference bandwidth threshold, determining filter characteristics by a fourth filtering parameter.

[0012] The present invention also provides a device for eliminating single-tone interference, comprising: a first frequency shifting module for moving the center frequency of the received signal to the interference point and removing the DC component in the received signal to obtain a first signal; a DC removal module for configuring filter characteristics according to the interference intensity and interference bandwidth to eliminate single-tone interference in the first signal to obtain a second signal; an optimization module for optimizing the second signal to obtain a third signal; and a second frequency shifting module for moving the center frequency of the third signal back to the zero-frequency position of the signal to obtain the final signal after eliminating single-tone interference.

[0013] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the single-tone interference elimination method as described above.

[0014] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for eliminating monotone interference as described above.

[0015] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the single-tone interference elimination method as described above.

[0016] The present invention provides a method, apparatus, device, storage medium, and program product for eliminating single-tone interference. The method includes: moving the center frequency of the received signal to the interference point using a first frequency shifting module and removing the DC component from the received signal to obtain a first signal; using a DC removal module, configuring filter characteristics according to the interference intensity and bandwidth to eliminate the single-tone interference in the first signal to obtain a second signal; optimizing the second signal to obtain a third signal; and moving the center frequency of the third signal back to the zero-frequency position using a second frequency shifting module to obtain the final signal after eliminating the single-tone interference. Through this method, the present invention requires only two frequency shifting operations, achieving the interference elimination goal using existing hardware modules with virtually no additional hardware circuitry, resulting in very low overall hardware overhead; it also eliminates the need for iterative closed-loop processing, reducing the risk of system non-convergence due to improper parameter configuration. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1This is a flowchart illustrating the method for eliminating single-tone interference provided in an embodiment of the present invention.

[0019] Figure 2 This is a digital circuit block diagram of a method for eliminating single-tone interference provided in an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the working process of the circuit module provided in the embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram showing the performance comparison of eliminating single-tone interference provided in an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of the single-tone interference elimination device provided in an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the physical structure of the electronic device provided in an embodiment of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0025] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0026] In related technologies, to eliminate single-tone interference, an additional interference cancellation module is typically added. This module includes a digital oscillator and several multiplication, addition, and saturation truncation processing units. Furthermore, the interference cancellation module usually employs a closed-loop iterative approach, requiring complex control to prevent divergence and a relatively long convergence time to achieve interference cancellation.

[0027] Based on this, the present invention provides a method for eliminating single-tone interference, which utilizes relatively low hardware overhead and mature hardware modules to achieve the goal of interference elimination through digital circuit architecture adjustment and flexible parameter configuration.

[0028] Please see Figure 1 , Figure 1 This is a schematic flowchart of a method for eliminating single-tone interference provided in an embodiment of the present invention. In this embodiment, the method for eliminating single-tone interference may include steps S110 to S140, and the specific steps are as follows: S110: The center frequency of the received signal is moved to the interference point by the first frequency shift module, and the DC component in the received signal is removed to obtain the first signal.

[0029] The received signal contains various complex information, single-tone interference, and other possible interference. The purpose of this embodiment is to eliminate single-tone interference in the received signal. First, a first frequency shifting module is used to perform frequency shifting processing on the received signal. This is done to create conditions for more accurate processing of interference signals in the subsequent process.

[0030] Meanwhile, the received signal often contains a DC component. Therefore, during the shift of the center frequency, the first frequency shift module can also remove the DC component from the received signal, finally obtaining the first signal.

[0031] Optionally, this step can also use the first frequency shift module to process the frequency shift and signal DC estimation simultaneously, reducing processing delay without affecting the DC estimation result.

[0032] S120: Using the DC removal module, the filter characteristics are configured according to the interference intensity and interference bandwidth to eliminate single-tone interference in the first signal and obtain the second signal.

[0033] After obtaining the first signal, the single-tone interference can be further processed using a DC-DC de-interference module. In this embodiment, the filter characteristics are configured according to the interference intensity and interference bandwidth, so that the filter can effectively remove the single-tone interference in the first signal, thereby obtaining the second signal.

[0034] S130: Optimize the second signal to obtain the third signal.

[0035] Although single-tone interference has been eliminated by the second signal, it may still have some other flaws. Therefore, to further improve signal quality, the second signal can be optimized. Optimization methods can vary, depending on the characteristics of the signal and the requirements of the specific application.

[0036] Optionally, optimization methods include filtering, equalization, and gain adjustment. By comprehensively applying these optimization methods, the second signal is optimized in a holistic way, thereby obtaining a third signal of higher quality.

[0037] Specifically, filtering can further remove any high-frequency or low-frequency noise that may remain in the signal, improving the signal purity; equalization can compensate for the distortion generated during signal transmission, making the amplitude and phase characteristics of the signal more in line with requirements; gain adjustment can appropriately amplify or reduce the signal strength according to the actual situation to meet the needs of subsequent processing or applications.

[0038] In some embodiments, the step of optimizing the second signal to obtain the third signal may specifically include: The second signal is downsampled and then filtered by the downsampling module to obtain the first intermediate signal; the gain of the first intermediate signal is adjusted by the digital automatic gain control module to obtain the second intermediate signal; the second intermediate signal includes I-path and Q-path; the I-path and Q-path of the second intermediate signal are adjusted by the imbalance compensation module to eliminate the amplitude and phase imbalance of the I and Q signals to obtain the third signal.

[0039] S140: The center frequency of the third signal is shifted back to the zero frequency position of the signal by the second frequency shift module to obtain the final signal after eliminating single-tone interference.

[0040] After completing the interference cancellation and optimization processes described above, a second frequency shift module is needed to move the signal's center frequency back to its zero-frequency position. This step yields the final signal with eliminated single-tone interference. This final signal not only eliminates single-tone interference but also has its center frequency at a standard zero-frequency position, exhibiting high quality and stability, and meeting the needs of various subsequent applications.

[0041] The single-tone interference elimination method provided by the embodiments of the present invention requires only two frequency shift operations and can achieve the goal of interference elimination using existing hardware modules. It basically does not add any additional hardware circuits, and the overall hardware overhead cost is very small. DC estimation is performed simultaneously with the first frequency shift operation, resulting in relatively low processing delay. It does not require iterative closed-loop processing, reducing the risk of system non-convergence due to improper parameter configuration.

[0042] In some embodiments, the step of moving the center frequency of the received signal to the location of the interference point via the first frequency shifting module may further include: The frequency point calculation module determines the relative interference frequency point, the frequency shift value of the first frequency shift module, the interference intensity, and the interference bandwidth based on the current working channel, the current working frequency band, and the intermediate frequency.

[0043] In some embodiments, the method for eliminating monotone interference may further include: Interference intensity data, interference bandwidth data, and working channel data are obtained through pre-measurement. The interference intensity data, interference bandwidth data, and working channel data are then organized to obtain a working channel interference lookup table. The working channel interference lookup table includes a one-to-one mapping relationship between interference intensity, interference bandwidth, and working channel. The interference intensity and interference bandwidth corresponding to the current working channel are determined from the working channel interference lookup table.

[0044] In this embodiment, interference strength With interference bandwidth It can be obtained through advance measurement, and is related to the working channel. The following is an example of the storage format for a one-to-one correspondence working channel interference lookup table:

[0045] Where N is defined as the total number of working channels within the frequency band, and the interference intensity is... It is the ratio of the relative strength of the interference to the signal per unit bandwidth, where the interference bandwidth is... It is the ratio of the interference bandwidth to the subcarrier spacing.

[0046] In some embodiments, the step of configuring filter characteristics based on interference intensity and interference bandwidth may specifically include: ① When the interference intensity is greater than or equal to the interference intensity threshold and the interference bandwidth is less than or equal to the interference bandwidth threshold, the filter characteristics are determined by the first filtering parameter.

[0047] ② When the interference intensity is greater than or equal to the interference intensity threshold and the interference bandwidth is greater than the interference bandwidth threshold, the filter characteristics are determined by the second filtering parameter.

[0048] ③ When the interference intensity is less than the interference intensity threshold and the interference bandwidth is less than or equal to the interference bandwidth threshold, the filter characteristics are determined by the third filtering parameter.

[0049] ④ When the interference intensity is less than the interference intensity threshold and the interference bandwidth is greater than the interference bandwidth threshold, the filter characteristics are determined by the fourth filtering parameter.

[0050] For example, the filter characteristics are determined by the filter parameter α, which can be determined in the following way: 1) When the interference intensity >= And interference bandwidth <= When α is set to the first filter parameter α0, such as 0.998; 2) When the interference intensity >= And interference bandwidth > When α is set to the second filter parameter α1, such as 0.984; 3) When the interference intensity < And interference bandwidth <= When α is configured as the third filter parameter α2, such as 0.996; 4) When the interference intensity < And interference bandwidth > When α is configured as the fourth filter parameter α3, such as 0.992.

[0051] in, Indicates the intensity of interference. Indicates the interference bandwidth. Indicates the threshold of interference intensity. This indicates the interference bandwidth threshold. , α 0、 α 1、 α 2、 α3 can be obtained through simulation and testing. Different α values ​​correspond to different limiting bandwidths, filtering gains, and convergence times.

[0052] Please see Figures 2-3 . Figure 2 This is a digital circuit block diagram of a method for eliminating single-tone interference provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the working process of the circuit module provided in the embodiment of the present invention.

[0053] In this embodiment, the circuit modules involved include an ADC module, a Cal_f module, an NCO1 module, a DCOC module, a DS_Filter module, a DAGC module, an IQB module, and an NCO2 module.

[0054] Among them, the ADC module is an analog-to-digital converter module; the NCO1 module and the NCO2 module are digitally controlled oscillation modules, which can be regarded as the first frequency shift module and the second frequency shift module in the above embodiments; the Cal_f module can be regarded as the frequency point calculation module in the above embodiments; the DCOC module can be regarded as the DC removal module in the above embodiments; the DS_Filter module can be regarded as the downsampling module in the above embodiments; the DAGC module can be regarded as the digital automatic gain control module in the above embodiments; and the IQB module can be regarded as the imbalance compensation module in the above embodiments.

[0055] In this embodiment, the module architecture in the digital front-end subsystem (DFE) can be used to first shift the center frequency to the interference frequency position through the NCO1 module, then use the DCOC module to eliminate the interference, and finally use the NCO2 module to shift the center frequency back to the signal spectrum position.

[0056] Specifically, the Cal_f module can calculate the frequency shift value based on the current operating channel, the current operating frequency band, and the low intermediate frequency (or zero intermediate frequency).

[0057] The NCO1 module can perform frequency shifting and DC removal functions. Assuming the center frequency of the received signal is f0 (kHz) and the interference frequency is f1 (kHz), the NCO1 module needs to shift the frequency by (f0+f1) kHz to move the center frequency of the baseband signal to position f1, synchronously calculate the average amplitude of the received signal, and remove this value to complete the DC removal process.

[0058] The DCOC module can eliminate interference at the f1 frequency after it is turned on. The DS_Filter module can reduce the baseband signal to half the signal rate and filter out out-of-band noise through a low-pass filter.

[0059] The DAGC module is a circuit used for automatic gain control estimation and digital adjustment; the IQB module is a circuit used to estimate and remove phase and amplitude imbalances in the I and Q channels.

[0060] The NCO2 module is a circuit for digital frequency offset correction, with a frequency offset correction value of Δf-f1 (kHz), thereby restoring the normal time-domain received signal, where f is the crystal oscillator frequency offset.

[0061] In some embodiments, a low-pass filter can be set in the DS_Filter module to filter out interference and noise outside the signal bandwidth. The filtering bandwidth is half the signal bandwidth plus the relative bandwidth of the interference frequency.

[0062] Continue reading Figure 3 First, the Chinese explanations for the characters appearing in the workflow diagram are as follows: r n Indicates the received signal; Indicates the first signal; Indicates the second signal; Indicates the first intermediate signal; Indicates a third signal; Indicates the final signal; f c Indicates the system's operating frequency band; ch n Indicates the working channel; f IF Indicates intermediate frequency; f ps This represents the frequency shift value of the NCO1 module; Indicates the intensity of interference; f1 represents the interference bandwidth; f1 represents the relative interference frequency; Δf represents the estimated crystal oscillator frequency offset.

[0063] The specific steps for implementing a method to eliminate single-tone interference using a modular architecture in a digital front-end subsystem are shown below: (1) Determine the frequency shift value f based on parameters such as the working channel and working frequency band. ps f1, and interference strength With interference bandwidth ,process: Center frequency: f0 = f c +(ch n -ch0)*0.1; Absolute interference frequency: ; Relative interference frequency: ; NCO1 frequency shift value: .

[0064] in, Sampling rate; This is the intermediate frequency (IF). For a zero IF system, this value is 0. The system's operating frequency band, such as 869 or 925 (in MHz); For example, 2407~3781; The reference channel number is known, for example, 2400.

[0065] This process calculates the relative interference frequency and determines the first frequency shift value f. ps Some related technologies define the frequency shift value as the intermediate frequency. .

[0066] (2) Turn on the NCO1 module and receive the signal r n Center frequency shifted to f ps Positioning and removing the DC component of the low-IF or zero-IF signal to obtain the signal. Frequency shift calculation is based on the frequency shift value f ps By looking up the sine table Obtain various dot product values The frequency-shifted time-domain signal is obtained by multiplying it sample by sample with the input signal. During this process, the summation and averaging module calculates the average amplitude of the input signal over a period of time to obtain the DC value. The DC value of the frequency-shifted signal is then removed. The relevant calculation formulas are as follows: ; ; ; ; in, , , and All numbers are complex numbers, and all calculations are performed using complex numbers.

[0067] This step processes frequency shift and DC signal estimation simultaneously, reducing processing delay without affecting the DC estimation results.

[0068] (3) Turn on the DCOC module, configure the filter parameters according to the interference intensity and interference bandwidth, eliminate single-tone interference, and obtain the signal. .

[0069] Among them, the transfer function of the DC-DC filter in the DCOC module It can be set to: ; in, This is the output data of the DC filter. These are the input data for the DC filter, and α is the filtering parameter of the DC filter.

[0070] (4) Enable the DS_Filter module, downsample and then filter to obtain the signal. .

[0071] Downsampling involves selecting one sample point from M input sample points for output, where M = 1, 2, 4, ...

[0072] The DS_Filter module has a bandwidth of ( A low-pass filter, wherein It is half the bandwidth of the received signal.

[0073] (5) Signal After passing through the DAGC module and the IQB module, digital gain control is completed and the amplitude and phase imbalance of the IQ signal is eliminated, resulting in the signal... .

[0074] (6) Signal After passing through the NCO2 module, the frequency shift value of the NCO2 module is , This allows the signal center frequency to return to its original zero-frequency position, resulting in the final signal after interference removal. Where Δf is the estimated frequency offset of the crystal oscillator. The relevant formulas are as follows: .

[0075] Therefore, through the above method, the first frequency shift of this invention moves the center frequency of the received signal to the interference frequency position of the working channel, and uses a DC interference removal circuit to eliminate the interference; the second frequency shift moves the signal after interference removal back to the zero frequency point. During the first frequency shift process, the average amplitude of the received signal is statistically analyzed to complete the low-IF or zero-IF DC removal function, thereby completing the DC removal of the signal without increasing the processing delay; the interference filtering parameters are determined according to the interference intensity and bandwidth under each working channel, and the single-tone interference is eliminated by using the filter's wave limiting characteristics; the second frequency shift process, while correcting the frequency offset of the transceiver crystal oscillator, moves the center frequency point back to the zero frequency position of the signal, ensuring that the interference removal process does not increase the processing delay.

[0076] Please see Figure 4 , Figure 4 This is a schematic diagram showing the performance comparison of eliminating single-tone interference provided in an embodiment of the present invention.

[0077] Figure 4 The performance comparison of this invention with related technologies is shown when the interference frequency is located between two subcarriers. SNR (Signal-to-Noise Ratio) represents the signal-to-noise ratio; BLER (Block Error Rate) represents the block error rate.

[0078] The no spur curve represents the performance without interference, the no removal curve represents the performance without interference removal, the alg2 curve represents the performance of the present invention, and the alg3 curve represents the performance of related solutions.

[0079] As can be seen from the figure, the present invention can achieve a slight performance gain while significantly reducing complexity.

[0080] When multiplying the crystal oscillator clock, deterministic interference may occur due to the non-ideals of the analog circuit. Eliminating this interference may increase the complexity of the analog circuit design, thereby increasing the overall chip cost. The single-tone interference elimination method provided by this invention eliminates this interference in the digital domain with minimal addition of digital circuitry, reducing the complexity of the analog circuit design, lowering the overall chip cost, and improving receiver sensitivity. Experimental results show that using this invention for interference cancellation can effectively improve receiver sensitivity by 1-5 dB for different interference intensities.

[0081] The present invention also provides a device for eliminating monotone interference. The device for eliminating monotone interference provided by the present invention will be described below. The device for eliminating monotone interference described below can be referred to in correspondence with the method for eliminating monotone interference described above.

[0082] Please see Figure 5 , Figure 5This is a schematic diagram of the single-tone interference cancellation device provided in an embodiment of the present invention. In this embodiment, the single-tone interference cancellation device may include: The first frequency shift module 510 is used to move the center frequency of the received signal to the interference point and remove the DC component in the received signal to obtain the first signal.

[0083] The DC-DC converter 520 is used to configure the filter characteristics according to the interference intensity and interference bandwidth to eliminate single-tone interference in the first signal and obtain the second signal.

[0084] The optimization module 530 is used to optimize the second signal to obtain the third signal.

[0085] The second frequency shift module 540 is used to shift the center frequency of the third signal back to the zero frequency position of the signal to obtain the final signal after eliminating single-tone interference.

[0086] In some embodiments, the optimization module 530 may include a downsampling module, a digital automatic gain control module, and an imbalance compensation module. Specifically, the optimization module 530 can be used for... The second signal is downsampled and then filtered by the downsampling module to obtain the first intermediate signal; the gain of the first intermediate signal is adjusted by the digital automatic gain control module to obtain the second intermediate signal; the second intermediate signal includes I-path and Q-path; the I-path and Q-path of the second intermediate signal are adjusted by the imbalance compensation module to eliminate the amplitude and phase imbalance of the I and Q signals to obtain the third signal.

[0087] In some embodiments, the single-tone interference elimination device may further include a frequency point calculation module, which may be used to determine the relative interference frequency point, the frequency shift value of the first frequency shift module, the interference intensity, and the interference bandwidth based on the current operating channel, the current operating frequency band, and the intermediate frequency.

[0088] In some embodiments, the single-tone interference elimination device may also include a lookup table module, which is specifically used for: obtaining interference intensity data, interference bandwidth data, and working channel data through pre-measurement; organizing the interference intensity data, interference bandwidth data, and working channel data to obtain a working channel interference lookup table; wherein the working channel interference lookup table includes a one-to-one mapping relationship between interference intensity, interference bandwidth, and working channel; and determining the interference intensity and interference bandwidth corresponding to the current working channel from the working channel interference lookup table.

[0089] In some embodiments, the first frequency shift module 510 may specifically be used for: The frequency shift and signal DC quantity estimation are processed simultaneously through the first frequency shift module.

[0090] In some embodiments, the DC de-energizing module 520 can be specifically used for: When the interference intensity is greater than or equal to the interference intensity threshold and the interference bandwidth is less than or equal to the interference bandwidth threshold, the filter characteristics are determined by the first filtering parameter; when the interference intensity is greater than or equal to the interference intensity threshold and the interference bandwidth is greater than the interference bandwidth threshold, the filter characteristics are determined by the second filtering parameter; when the interference intensity is less than the interference intensity threshold and the interference bandwidth is less than or equal to the interference bandwidth threshold, the filter characteristics are determined by the third filtering parameter; when the interference intensity is less than the interference intensity threshold and the interference bandwidth is greater than the interference bandwidth threshold, the filter characteristics are determined by the fourth filtering parameter.

[0091] The present invention provides a device for eliminating single-tone interference, comprising: a first frequency shifting module for moving the center frequency of the received signal to the interference point and removing the DC component from the received signal to obtain a first signal; a DC removal module for configuring filter characteristics according to the interference intensity and interference bandwidth to eliminate single-tone interference in the first signal to obtain a second signal; an optimization module for optimizing the second signal to obtain a third signal; and a second frequency shifting module for shifting the center frequency of the third signal back to the zero-frequency position to obtain the final signal after eliminating single-tone interference. Through the above method, the present invention can achieve the goal of eliminating interference without adding or only adding a very small amount of circuitry, and it does not require iterative closed-loop processing, reducing the risk of system non-convergence due to improper parameter configuration.

[0092] On the other hand, embodiments of the present invention also provide an electronic device, please refer to... Figure 6 , Figure 6 This is a schematic diagram of the physical structure of the electronic device provided in the embodiments of the present invention, such as... Figure 6 As shown, the electronic device may include a memory 620, a processor 610, and a computer program stored in the memory 620 and executable on the processor 610. When the processor 610 executes the program, it implements the methods for eliminating monotone interference provided by the methods described above.

[0093] Optionally, the electronic device may further include a communication bus 630 and a communication interface 640, wherein the processor 610, the communication interface 640, and the memory 620 communicate with each other via the communication bus 630. The processor 610 can call a computer program in the memory 620 to execute a method for eliminating single-tone interference, which may include: The first frequency shift module moves the center frequency of the received signal to the interference point and removes the DC component from the received signal to obtain the first signal. The DC removal module is used to configure the filter characteristics according to the interference intensity and interference bandwidth to eliminate the single-tone interference in the first signal to obtain the second signal. The second signal is optimized to obtain the third signal. The second frequency shift module moves the center frequency of the third signal back to the zero frequency position to obtain the final signal after eliminating the single-tone interference.

[0094] Furthermore, the logical instructions in the aforementioned memory 620 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0095] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can perform the methods for eliminating single-tone interference provided by the above methods. The steps and principles of these methods have been described in detail in the above methods and will not be repeated here.

[0096] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, it is implemented to perform the methods for eliminating monotone interference provided by the above methods. The steps and principles of the methods have been described in detail in the above methods and will not be repeated here.

[0097] Non-transitory computer-readable storage media can be any available medium or data storage device that can be accessed by a processor, including but not limited to magnetic storage (e.g., floppy disks, hard disks, magnetic tapes, magneto-optical disks (MOs), etc.), optical storage (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND flash), solid-state drives (SSDs)).

[0098] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0099] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for eliminating monotone interference, characterized in that, include: The first frequency shift module moves the center frequency of the received signal to the interference point and removes the DC component from the received signal to obtain the first signal. By using a DC-DC converter, the filter characteristics are configured according to the interference intensity and interference bandwidth to eliminate single-tone interference in the first signal and obtain the second signal. The second signal is optimized to obtain the third signal; The center frequency of the third signal is shifted back to the zero frequency position by the second frequency shift module, thus obtaining the final signal after eliminating single-tone interference.

2. The method for eliminating monotone interference according to claim 1, characterized in that, The optimization processing of the second signal to obtain the third signal includes: The second signal is downsampled by the downsampling module and then filtered to obtain the first intermediate signal; The first intermediate signal is adjusted by a digital automatic gain control module to obtain a second intermediate signal; the second intermediate signal includes an I-channel and a Q-channel. The unbalanced compensation module adjusts the I and Q paths of the second intermediate signal to eliminate the amplitude and phase imbalance of the I and Q signals, thus obtaining the third signal.

3. The method for eliminating single-tone interference according to claim 1, characterized in that, Before moving the center frequency of the received signal to the interference point position via the first frequency shift module, the method further includes: The frequency point calculation module determines the relative interference frequency point, the frequency shift value of the first frequency shift module, the interference intensity, and the interference bandwidth based on the current working channel, the current working frequency band, and the intermediate frequency.

4. The method for eliminating single-tone interference according to claim 3, characterized in that, Also includes: Interference intensity data, interference bandwidth data, and operating channel data are obtained through prior measurement. The interference intensity data, the interference bandwidth data, and the working channel data are organized to obtain a working channel interference lookup table; wherein the working channel interference lookup table includes a one-to-one mapping relationship between interference intensity, interference bandwidth, and working channel. Determine the interference intensity and interference bandwidth corresponding to the current working channel from the working channel interference lookup table.

5. The method for eliminating monotone interference according to claim 1, characterized in that, Also includes: The frequency shift and signal DC quantity estimation are processed simultaneously by the first frequency shift module.

6. The method for eliminating single-tone interference according to claim 1, characterized in that, The configuration of filter characteristics based on interference intensity and interference bandwidth includes: When the interference intensity is greater than or equal to the interference intensity threshold and the interference bandwidth is less than or equal to the interference bandwidth threshold, the filter characteristics are determined by the first filtering parameters. When the interference intensity is greater than or equal to the interference intensity threshold and the interference bandwidth is greater than the interference bandwidth threshold, the filter characteristics are determined by the second filtering parameters. When the interference intensity is less than the interference intensity threshold and the interference bandwidth is less than or equal to the interference bandwidth threshold, the filter characteristics are determined by the third filtering parameter. When the interference intensity is less than the interference intensity threshold and the interference bandwidth is greater than the interference bandwidth threshold, the filter characteristics are determined by the fourth filtering parameter.

7. A device for eliminating monotone interference, characterized in that, include: The first frequency shift module is used to move the center frequency of the received signal to the interference point and remove the DC component in the received signal to obtain the first signal. The DC-DC removal module is used to configure the filter characteristics according to the interference intensity and interference bandwidth to eliminate the single-tone interference in the first signal and obtain the second signal; An optimization module is used to optimize the second signal to obtain a third signal; The second frequency shift module is used to shift the center frequency of the third signal back to the zero frequency position of the signal to obtain the final signal after eliminating single-tone interference.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the method for eliminating monotone interference as described in any one of claims 1 to 6.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method for eliminating monotone interference as described in any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the method for eliminating monotone interference as described in any one of claims 1 to 6.

Images