CN114710173A - Interference signal filtering method and device, electronic equipment and storage medium - Google Patents
Interference signal filtering method and device, electronic equipment and storage medium Download PDFInfo
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Abstract
The embodiment of the invention discloses an interference signal filtering method, an interference signal filtering device, electronic equipment and a storage medium, wherein the interference signal filtering method comprises the following steps: receiving original signals transmitted by a first number of transmitting terminals through a target receiving terminal, wherein the target receiving terminal is any one of a second number of receiving terminals; determining the multi-order intermodulation interference frequency of each transmitting terminal according to the current transmitting frequency and the working frequency band of each transmitting terminal in the first number of transmitting terminals; and filtering the original signal based on the multi-order intermodulation interference frequency of each transmitting terminal. The method of the embodiment of the invention can effectively filter the multi-order intermodulation interference signals generated by a plurality of transmitting terminals, thereby solving the problems of noise, crosstalk, low signal-to-noise ratio and the like caused by the multi-order intermodulation interference signals of the plurality of transmitting terminals and simultaneously avoiding the problem of signal distortion caused by excessive signal filtering.
Description
Technical Field
The present invention relates to signal processing technologies, and in particular, to a method and an apparatus for filtering an interference signal, an electronic device, and a storage medium.
Background
In an audio apparatus, a situation often occurs in which a plurality of transmitting terminals correspond to one receiving terminal or a plurality of receiving terminals. When a plurality of transmitting terminals work simultaneously, the receiving terminal receives the audio signals transmitted by the corresponding transmitting terminal and also receives the audio signals transmitted by other transmitting terminals, so that the audio signals received by the receiving terminal have the problems of crosstalk, noise and poor signal-to-noise ratio.
The existing method for eliminating interference signals generally comprises the steps of closing a transmitting terminal corresponding to a receiving terminal, receiving interference information sent by other transmitting terminals, and filtering the interference information in the following actual work. However, this method can only eliminate or reduce noise of interference information when two sets of transmitting and receiving terminals receive simple intermodulation interference frequencies. However, when multiple sets of transmitting terminals and receiving terminals work simultaneously, there may be multiple orders of intermodulation interference signals with crossed frequency bands, and only by a simple method of filtering the interference frequency bands, the problem of sound distortion or failure to effectively filter the interference signals may occur.
Disclosure of Invention
The embodiment of the invention provides an interference signal filtering method and device, electronic equipment and a storage medium.
In a first aspect, an embodiment of the present invention provides an interference signal filtering method, which is applied to an audio apparatus including a first number of transmitting ends and a second number of receiving ends, where the method includes:
receiving the original signals transmitted by the first number of transmitting terminals through a target receiving terminal, wherein the target receiving terminal is any one of the second number of receiving terminals;
determining the multi-order intermodulation interference frequency of each transmitting terminal according to the current transmitting frequency and the working frequency band of each transmitting terminal in the first number of transmitting terminals;
and filtering the original signal based on the multi-order intermodulation interference frequency of each transmitting terminal.
In a second aspect, an embodiment of the present invention provides an interference signal filtering apparatus, where the apparatus includes:
a signal receiving module, configured to receive, through a target receiving end, an original signal transmitted by the first number of transmitting ends, where the target receiving end is any one of the second number of receiving ends;
an interference frequency determining module, configured to determine a multi-order intermodulation interference frequency of each transmitting end according to a current transmitting frequency and a working frequency band of each transmitting end of the first number of transmitting ends;
and the signal filtering module is used for filtering the original signal based on the multi-order intermodulation interference frequency of each transmitting terminal.
In a third aspect, an embodiment of the present invention further provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the interference signal filtering method according to any one of the embodiments of the present invention.
In a fourth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the interference signal filtering method according to any one of the embodiments of the present invention.
In the embodiment of the invention, the original signals transmitted by the first number of transmitting terminals can be received by the target receiving terminal, wherein the target receiving terminal is any one of the second number of receiving terminals; determining the multi-order intermodulation interference frequency of each transmitting terminal according to the current transmitting frequency and the working frequency band of each transmitting terminal in the first number of transmitting terminals; and filtering the original signal based on the multi-order intermodulation interference frequency of each transmitting terminal. That is, in the embodiment of the present invention, the multi-order intermodulation interference frequency of each transmitting end may be determined based on the current transmitting frequency and the operating frequency band of each transmitting end, and the original signal is filtered based on the multi-order intermodulation interference frequency of each transmitting end, so that it is not necessary to determine the interference information by turning off the transmitting end, and the method may be applied to a case with a plurality of transmitting ends; furthermore, the original signal is filtered based on the multi-order intermodulation interference frequency of each transmitting end, so that the problems of noise, crosstalk, low signal-to-noise ratio and the like caused by the multi-order intermodulation interference signals of a plurality of transmitting ends can be solved, and the problem of signal distortion caused by excessive signal filtering is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic flowchart of an interference signal filtering method according to an embodiment of the present invention;
fig. 2 is another flowchart of an interference signal filtering method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of multi-order intermodulation interference frequencies according to an embodiment of the present invention;
fig. 4 is a structural diagram of an interference signal filtering apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic flow chart of an interference signal filtering method according to an embodiment of the present invention, where the method according to the embodiment of the present invention is applicable to filtering an original signal to eliminate an interference signal when multiple transmitting terminals work simultaneously. The method can be performed by the interference signal filtering apparatus provided by the embodiment of the present invention, and the apparatus can be implemented in software and/or hardware. In a particular embodiment, the apparatus may be integrated in an electronic device, which may be, for example, an audio apparatus. The following embodiments will be described by taking as an example that the apparatus is integrated in an audio apparatus, the audio apparatus includes a first number of transmitting ends and a second number of receiving ends, the first number may be one or more, the second number may also be one or more, the first number and the second number may be the same or different, and referring to fig. 1, the method may specifically include the following steps:
The receiving end is a device capable of receiving audio signals in the audio device, and the transmitting end is a device capable of sending out audio signals in the audio device. The original signals are all audio signals from the first number of transmitting terminals that the target receiving terminal can receive, and the signals include the transmitting signals of the first number of transmitting terminals and signals generated by superposition of the transmitting signals. One receiving end can receive the audio signals transmitted by one or more transmitting ends, and a plurality of receiving ends can also receive the audio signals transmitted by one or more transmitting ends simultaneously. Illustratively, there are three transmitting terminals A, B and C and three receiving terminals P, Q and S. When the audio signal from A needs to be acquired from P, P is the target receiving end, and A is the target transmitting end. When audio signals from A and B need to be acquired from P, P is a target receiving end, and A and B are both target transmitting ends. Specifically, after a target receiving end and a target transmitting end are determined, original signals transmitted by a first number of transmitting ends are received by the target receiving end.
Wherein the current transmission frequency is a frequency at which each transmitting end transmits a signal when the target receiving end receives the audio signal. The working frequency band is the frequency range of the sound wave transmitted by the transmitting end. When a plurality of transmitting terminals transmit signals to a target receiving terminal at the same time, due to the nonlinear effect, the combined frequency of the plurality of transmitting signals sometimes is exactly equal to or close to the signal to be received by the target receiving terminal, so that the signals are received by the target receiving terminal. The combined frequency of the plurality of transmit signals is the multi-order intermodulation interference frequency. The multi-order intermodulation interference frequency can be received by the target receiving terminal, but is not the transmitting signal sent by the target transmitting terminal, so that the target receiving terminal can be interfered to receive the transmitting signal of the target transmitting terminal.
Specifically, after the number of the transmitting ends is determined, the working frequency band of each transmitting end is obtained. For example, when there are two transmitting terminals, the operating frequency band may be divided into two parts, namely a first operating frequency band and a second operating frequency band. Specifically, a certain number of frequency points are selected from the working frequency bands of each transmitting end, and the frequency points selected from each working frequency band may form a corresponding frequency point set. For example, there are 3 transmitters, namely transmitter a, transmitter B and transmitter C. Then, it may be determined that the operating frequency bands corresponding to the transmitting end a, the transmitting end B, and the transmitting end C are the first operating frequency band, the second operating frequency band, and the third operating frequency band, respectively. Further, a certain number of frequency points are selected from the first working frequency band, the second working frequency band and the third working frequency band, and the frequency points are used for forming a first frequency point set, a second frequency point set and a third frequency point set respectively. Selecting points from the first working frequency band to form a first frequency point set, selecting points from the second working frequency band to form a second frequency point set, and selecting points from the third working frequency band to form a third frequency point set; when selecting points from each working frequency band, all points in the corresponding working frequency band can be selected, and partial points in the corresponding working frequency band can be selected according to a specified rule. And selecting partial points in the corresponding working frequency band according to the specified rule, so that the number of the selected points can be reduced, and the processing speed is improved.
And after the frequency point sets of each transmitting end are obtained, determining the interference order according to the number of the frequency points in each frequency point set. Specifically, after the frequency point sets of the transmitting ends are determined, one frequency point can be sequentially selected from each frequency point set each time to construct one frequency point set, all frequency points in each frequency point set are traversed to construct all possible frequency point combinations, and the number of the obtained frequency point combinations is used as the interference order. By way of example, a first set of frequency points, a second set of frequency points, and a third set of frequency points are now obtained. Wherein, each frequency point set comprises 50 frequency points. One frequency point is randomly selected from each frequency point set, and obviously, one frequency point is selected from each of 3 frequency point setsFrequency points, and combining the selected frequencies
And (4) a combination mode. Further, the number of combinations of frequency points in the 3 frequency point sets that can be obtained is 50 × 50 × 50, and the number of combinations thereof is taken as the interference order.
Further, the frequency of the interference signal formed by the interference transmitter of each transmitter is determined. Wherein the interfering transmitting terminals are the other transmitting terminals of the first number of transmitting terminals except for each transmitting terminal itself. The current transmitting frequency of the interference transmitting end and the multi-order intermodulation interference frequency of the interference transmitting end are the interference signal frequency of the current transmitting end. Further, determining the multi-order intermodulation interference frequency of each transmitting terminal according to the interference order, the current transmitting frequency of each transmitting terminal and the interference signal frequency formed by the interference transmitting terminal of each transmitting terminal. In an example, it is assumed that there are 3 transmitting terminals, namely, a transmitting terminal a, a transmitting terminal B, and a transmitting terminal C, and it is assumed that the interference order is determined to be N according to the number of frequency points included in the frequency point sets of the transmitting terminals a, B, and C. Further, it can be determined that the first-order intermodulation interference frequency of the transmitting end a is
The second order intermodulation interference frequency of the transmitting terminal A is
The third order intermodulation interference frequency of the transmitting terminal A is
And so on until calculating the N-order intermodulation interference frequency of the transmitting terminal A
. Wherein,
indicating the current transmit frequency of the transmitting end a,
indicating any one of the interfering signal frequencies formed by the interfering transmitter end of transmitter end a. Further, the N-order intermodulation interference frequency of the transmitting terminal B is calculated
N order intermodulation interference frequency of transmitting terminal C
。
And 103, filtering the original signal based on the multi-order intermodulation interference frequency of each transmitting end.
The original signals are all audio signals which can be received by the target receiving end and come from the first number of transmitting ends, and the signals comprise transmitting signals of the first number of transmitting ends and signals generated by superposition of the transmitting signals. Specifically, after the multi-order intermodulation interference frequency of each transmitting end is determined, the multi-order intermodulation interference frequency of each transmitting end in the original signal and the current transmitting frequency of the interference transmitting end are filtered, and a filtered target audio signal is obtained. For example, assume that there are 3 transmitting terminals, namely, a transmitting terminal a, a transmitting terminal B and a transmitting terminal C, and the N-order intermodulation interference frequency of the transmitting terminal a is
The N-order intermodulation interference frequency of the transmitting end B is
The N-order intermodulation interference frequency of the transmitting end C is
. Assuming that the transmitting end A is the target transmitting end, the original signal received by the target receiving end corresponding to the transmitting end A is filtered
. Of course, if the target transmitting terminals are the transmitting terminal a and the transmitting terminal B, only the multi-order intermodulation interference frequencies of the transmitting terminal a and the transmitting terminal B, the current transmitting frequency of the transmitting terminal C, and the multi-order intermodulation interference frequencies of the transmitting terminal C need to be filtered.
According to the technical scheme of the embodiment, the original signals transmitted by the first number of transmitting terminals can be received by the target receiving terminal, wherein the target receiving terminal is any one of the second number of receiving terminals; determining the multi-order intermodulation interference frequency of each transmitting terminal according to the current transmitting frequency and the working frequency band of each transmitting terminal in the first number of transmitting terminals; and filtering the original signal based on the multi-order intermodulation interference frequency of each transmitting terminal. By utilizing the technical scheme of the embodiment, the multi-order intermodulation interference signals generated by the plurality of transmitting terminals can be effectively filtered, so that the problems of noise, crosstalk, low signal-to-noise ratio and the like caused by the multi-order intermodulation interference signals of the plurality of transmitting terminals are solved, and the problem of signal distortion caused by excessive signal filtering is avoided.
Fig. 2 is another flowchart of an interference signal filtering method according to an embodiment of the present invention, which is further detailed based on the foregoing embodiment. Specifically, the method can be shown in fig. 2, and the method can include the following steps:
The working frequency range is the frequency range of the sound wave transmitted by the transmitting end. Specifically, after the number of the transmitting ends is determined, the working frequency band of each transmitting end is selected. For example, when there are two transmitting terminals, the selected operating frequency band may be divided into two parts, namely, a first operating frequency band and a second operating frequency band. The working frequency band of each transmitting terminal consists of frequency points in the signals transmitted by each transmitting terminal. Specifically, frequency points are selected from the working frequency bands of the transmitting ends, and the selected frequency points are used for constructing a frequency point set corresponding to each transmitting end.
In this embodiment, optionally, frequency points are selected from the working frequency band of each transmitting end according to the arithmetic progression to construct a frequency point set corresponding to each transmitting end, so as to obtain a first number of frequency point sets.
In the working frequency band of each transmitting terminal, the frequency points may be selected according to a certain rule, for example, according to an arithmetic progression. For example, there are 50 frequency points in the operating band in the transmitting end a, 10 points are selected from the operating band in the transmitting end a according to the arithmetic progression rule of 5, 10, and 15 … … 50, and the 10 points are used to construct the frequency point set of the transmitting end. Further, frequency points are selected from the working frequency band of each transmitting end according to the arithmetic progression to construct a frequency point set corresponding to each transmitting end, and a first number of frequency point sets are obtained.
And selecting frequency points from the working frequency band of each transmitting end according to the arithmetic progression to construct a frequency point set corresponding to each transmitting end, so that the calculation amount of subsequent work can be reduced without influencing the final result.
And step 203, determining an interference order according to the number of the frequency points in each frequency point set.
And after the frequency point set of each transmitting terminal is determined, determining the interference order according to the number of the frequency points in each frequency point set.
In this embodiment, optionally, the number of frequency points in each frequency point set is multiplied to obtain the interference order.
Specifically, after the frequency point set of each transmitting end is determined, one point is randomly selected from each frequency point set. For example, there are 10 frequency points in the frequency point set corresponding to the transmitting end a, and there are 10 selection ways for selecting a frequency point from the 10 frequency points. If there are 5 frequency points in the frequency point set corresponding to the transmitting terminal B, there are 5 selection manners for selecting a frequency point from the 5 frequency points. Further, the randomly selected points in each transmitting end frequency point set are combined in a manner of 10 × 5= 50. Further, 10 × 5=50 is taken as the interference order.
And step 204, determining the frequency of the interference signal formed by the interference emission end of each emission end.
The method includes the steps that for a current transmitting end in each transmitting end, current transmitting frequencies of other transmitting ends and multi-order intermodulation interference frequencies of other transmitting ends are determined as interference signal frequencies formed by interference transmitting ends of the current transmitting end, and the other transmitting ends are transmitting ends except the current transmitting end in a first number of transmitting ends. For example, there are three transmitting terminals, and when the transmitting terminal a is the current transmitting terminal, the interference transmitting terminals of the transmitting terminal a are the transmitting terminal B and the transmitting terminal C. Further, calculating the multi-order intermodulation interference frequency of the transmitting end B and the transmitting end C, and assuming that the current transmitting frequency of the transmitting end B and the transmitting end C is
And
. The interference signal frequency of the transmitting end A is the multi-order intermodulation interference frequency sum of the transmitting end B and the transmitting end C
And
。
Wherein the interference order may be obtained by multiplying the number of frequency points in each set of frequency points. When a plurality of transmitting terminals transmit signals to a target receiving terminal at the same time, due to the nonlinear effect, the combined frequency of the plurality of transmitting signals sometimes is exactly equal to or close to the signal to be received by the target receiving terminal, so that the signals are received by the target receiving terminal. The combined frequency of the plurality of transmit signals is the multi-order intermodulation interference frequency. FIG. 3 is a schematic representation of the practice of the present inventionThe schematic diagram of the multi-order intermodulation interference frequency is provided. As shown in FIG. 3, the frequencies emitted from the transmitting end A and the transmitting end B are
And
by using
And
representing the first, second and third order intermodulation interference frequencies of the transmitting terminal A, using
And
representing the first, second and third order intermodulation interference frequencies of the transmitting end B. In fig. 3, the horizontal axis represents frequency, and the vertical axis represents the energy value of the frequency signal.
In this scheme, determining the multi-order intermodulation interference frequency of each transmitting terminal according to the interference order, the current transmitting frequency of each transmitting terminal and the interference signal frequency formed by the interference transmitting terminal of each transmitting terminal includes:
aiming at the current transmitting end C in each transmitting end, the i-order intermodulation interference frequency of the current transmitting end C
The calculation method is as follows:
wherein,ia value is taken within the order of the interference,
represents the current transmission frequency of the current transmitting terminal C,
indicates any one of the interference signal frequencies formed by the interference transmitter of the current transmitter C.
Illustratively, there are three transmitting terminals, namely, transmitting terminal a, transmitting terminal B and transmitting terminal C. And determining the interference order number to be N according to the number of the frequency points in each frequency point set. Further, an nth order intermodulation interference frequency of the transmitting terminal a may be determined
N order intermodulation interference frequency of transmitting terminal B
N order intermodulation interference frequency of transmitting terminal C
。
Illustratively, there are 3 transmitters, namely transmitter a, transmitter B and transmitter C. If the target transmitting end corresponding to the target receiving end is the transmitting end a, the transmitting end B and the transmitting end C may be determined as the remaining transmitting ends.
For example, the transmitting end A is a target transmitting end, and the multi-order intermodulation interference frequency of the transmitting end A is
. The remaining transmitting terminals are a transmitting terminal B and a transmitting terminal C, and the multi-order intermodulation interference frequency and the current transmitting frequency of the remaining transmitting terminals are respectively:
、
and
. The target interference frequency of the transmitting end A is
。
And 208, filtering out the signal of the target interference frequency from the original signal to obtain a target signal.
Wherein the original signal is all audio signals from a first number of transmitting ends that the target receiving end is able to receive. The target interference frequency is a multi-order intermodulation interference frequency of the target transmitting terminal, a current transmitting frequency of the rest transmitting terminals and a multi-order intermodulation interference frequency of the rest transmitting terminals.
Step 209 determines a correlated interference frequency based on the target interference frequency and the interference threshold.
The interference threshold value can be set in advance according to actual conditions and requirements. Specifically, the interference frequency of which the absolute value of the difference value from the target interference frequency is smaller than the interference threshold is determined as the relevant interference frequency. For example, assuming that the target interference frequency is 70MHZ and the interference threshold is 5MHZ, the relevant interference frequency is 65MHZ to 75 MHZ.
Wherein the target signal is a signal that filters out a target interference frequency from the original signal. After the target signal is obtained, the signal of the relevant interference frequency is filtered from the target signal, so that the target receiving end is further ensured not to be interfered by the relevant interference frequency.
In the embodiment of the invention, the original signals transmitted by the first number of transmitting terminals are received by the target receiving terminal, and the target receiving terminal is any one of the second number of receiving terminals. And selecting frequency points from the working frequency band of each transmitting end to construct a frequency point set corresponding to each transmitting end to obtain a first number of frequency point sets. And determining the interference order according to the number of the frequency points in each frequency point set. The frequency of the interference signal formed by the interfering transmitter end of each transmitter end is determined. And determining the multi-order intermodulation interference frequency of each transmitting end according to the interference order, the current transmitting frequency of each transmitting end and the interference signal frequency formed by the interference transmitting end of each transmitting end. And determining target transmitting ends corresponding to the target receiving ends from the first number of transmitting ends, and determining transmitting ends except the target transmitting ends from the first number of transmitting ends as the remaining transmitting ends. Determining multi-order intermodulation interference frequencies of a target transmitting end, current transmitting frequencies of the rest transmitting ends and multi-order intermodulation interference frequencies of the rest transmitting ends as target interference frequencies; and filtering out the signal of the target interference frequency from the original signal to obtain a target signal. A correlated interference frequency is determined based on the target interference frequency and the interference threshold. Signals of the relevant interference frequencies are filtered out from the target signal. In the technical scheme of this embodiment, the target interference frequency is calculated according to the selected frequency point by determining the frequency point set, so that the interference frequency in the original signal can be quickly and accurately screened out and filtered. Meanwhile, the efficiency and the accuracy of calculating the multi-order intermodulation interference frequency are improved, and the multi-order intermodulation interference signals generated by a plurality of transmitting terminals can be effectively filtered, so that the problems of noise, crosstalk, low signal-to-noise ratio and the like caused by the multi-order intermodulation interference signals of the plurality of transmitting terminals are solved.
Fig. 4 is a block diagram of an interference signal filtering apparatus according to an embodiment of the present invention, which is suitable for implementing the interference signal filtering method according to the embodiment of the present invention. As shown in fig. 4, the apparatus may specifically include:
a signal receiving module 401, configured to receive, through a target receiving end, an original signal transmitted by the first number of transmitting ends, where the target receiving end is any one of the second number of receiving ends;
an interference frequency determining module 402, configured to determine a multi-order intermodulation interference frequency of each transmitting end according to a current transmitting frequency and an operating frequency band of each transmitting end of the first number of transmitting ends;
a signal filtering module 403, configured to filter the original signal based on the multiple orders of intermodulation interference frequencies of each transmitting end.
Optionally, the interference frequency determining module 402 is specifically configured to:
selecting frequency points from the working frequency band of each transmitting end to construct a frequency point set corresponding to each transmitting end to obtain the frequency point sets of the first number;
determining an interference order according to the number of frequency points in each frequency point set;
determining the frequency of an interference signal formed by the interference transmitter of each transmitter;
and determining the multi-order intermodulation interference frequency of each transmitting terminal according to the interference order, the current transmitting frequency of each transmitting terminal and the interference signal frequency formed by the interference transmitting terminal of each transmitting terminal.
Optionally, the interference frequency determining module 402 is further configured to:
and selecting frequency points from the working frequency band of each transmitting end according to the arithmetic progression to construct a frequency point set corresponding to each transmitting end, so as to obtain the frequency point set of the first number.
Optionally, the interference frequency determining module 402 is further configured to:
and multiplying the number of the frequency points in each frequency point set to obtain the interference order.
Optionally, the interference frequency determining module 402 is further configured to:
and for a current transmitting end of each transmitting end, determining a current transmitting frequency of other transmitting ends and a multi-order intermodulation interference frequency of the other transmitting ends as an interference signal frequency formed by an interference transmitting end of the current transmitting end, wherein the other transmitting ends are transmitting ends of the first number of transmitting ends except the current transmitting end.
Optionally, the signal filtering module 403 is specifically configured to:
determining target transmitting ends corresponding to the target receiving ends from the first number of transmitting ends, and determining transmitting ends except the target transmitting ends from the first number of transmitting ends as residual transmitting ends;
determining the multi-order intermodulation interference frequency of the target transmitting terminal, the current transmitting frequency of the residual transmitting terminal and the multi-order intermodulation interference frequency of the residual transmitting terminal as target interference frequencies;
and filtering the signal of the target interference frequency from the original signal to obtain a target signal.
Optionally, the signal filtering module 403 is further configured to:
determining a relevant interference frequency based on the target interference frequency and an interference threshold;
filtering out the signal of the relevant interference frequency from the target signal.
The interference signal filtering device provided by the embodiment of the invention can execute the interference signal filtering method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method. Reference may be made to the description of any method embodiment of the invention not specifically described in this embodiment.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and referring to fig. 5, a schematic structural diagram of a computer system 12 suitable for implementing the electronic device according to the embodiment of the present invention is shown. The electronic device shown in fig. 5 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present invention. The components of electronic device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that couples various system components including the system memory 28 and the processing unit 16.
The system memory 28 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM) 30 and/or cache memory 32. The electronic device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 5, and commonly referred to as a "hard drive"). Although not shown in FIG. 5, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 by one or more data media interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the invention.
A program/utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. Program modules 42 generally carry out the functions and/or methodologies of the described embodiments of the invention.
The processing unit 16 executes programs stored in the system memory 28 to perform various functional applications and interference signal filtering, for example, to implement an interference signal filtering method provided by the embodiment of the present invention: receiving original signals transmitted by a first number of transmitting terminals through a target receiving terminal, wherein the target receiving terminal is any one of a second number of receiving terminals; determining the multi-order intermodulation interference frequency of each transmitting terminal according to the current transmitting frequency and the working frequency band of each transmitting terminal in the first number of transmitting terminals; and filtering the original signal based on the multi-order intermodulation interference frequency of each transmitting terminal.
Embodiments of the present invention provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements an interference signal filtering method according to all embodiments of the present invention: receiving original signals transmitted by a first number of transmitting terminals through a target receiving terminal, wherein the target receiving terminal is any one of a second number of receiving terminals; determining the multi-order intermodulation interference frequency of each transmitting terminal according to the current transmitting frequency and the working frequency band of each transmitting terminal in the first number of transmitting terminals; and filtering the original signal based on the multi-order intermodulation interference frequency of each transmitting terminal. Any combination of one or more computer-readable media may be employed. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + +, or the like, as well as conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An interference signal filtering method applied to an audio apparatus including a first number of transmitting terminals and a second number of receiving terminals, the method comprising:
receiving the original signals transmitted by the first number of transmitting terminals through a target receiving terminal, wherein the target receiving terminal is any one of the second number of receiving terminals;
determining the multi-order intermodulation interference frequency of each transmitting terminal according to the current transmitting frequency and the working frequency band of each transmitting terminal in the first number of transmitting terminals;
and filtering the original signal based on the multi-order intermodulation interference frequency of each transmitting terminal.
2. The method of claim 1, wherein the determining the multi-order intermodulation interference frequencies of each of the first number of transmitting ends according to the current transmitting frequency and the operating frequency band of each of the transmitting ends comprises:
selecting frequency points from the working frequency band of each transmitting end to construct a frequency point set corresponding to each transmitting end to obtain the frequency point sets of the first number;
determining an interference order according to the number of frequency points in each frequency point set;
determining the frequency of an interference signal formed by the interference transmitter of each transmitter;
and determining the multi-order intermodulation interference frequency of each transmitting end according to the interference order, the current transmitting frequency of each transmitting end and the interference signal frequency formed by the interference transmitting end of each transmitting end.
3. The method according to claim 2, wherein the selecting frequency points from the operating frequency band of each transmitting end to construct the frequency point set corresponding to each transmitting end, and obtaining the first number of frequency point sets comprises:
and selecting frequency points from the working frequency band of each transmitting end according to the arithmetic progression to construct a frequency point set corresponding to each transmitting end, so as to obtain the frequency point set of the first number.
4. The method of claim 2, wherein the determining the interference order according to the number of frequency points in each frequency point set comprises:
and multiplying the number of the frequency points in each frequency point set to obtain the interference order.
5. The method of claim 2, wherein the determining the frequency of the interference signal formed by the interference transmitter of each transmitter comprises:
and for a current transmitting end of each transmitting end, determining a current transmitting frequency of other transmitting ends and a multi-order intermodulation interference frequency of the other transmitting ends as an interference signal frequency formed by an interference transmitting end of the current transmitting end, wherein the other transmitting ends are transmitting ends of the first number of transmitting ends except the current transmitting end.
6. The interference signal filtering method according to claim 1, wherein the filtering the original signal based on the multi-order intermodulation interference frequencies of each transmitting end comprises:
determining target transmitting ends corresponding to the target receiving ends from the first number of transmitting ends, and determining transmitting ends except the target transmitting ends from the first number of transmitting ends as residual transmitting ends;
determining the multi-order intermodulation interference frequency of the target transmitting terminal, the current transmitting frequency of the residual transmitting terminal and the multi-order intermodulation interference frequency of the residual transmitting terminal as target interference frequencies;
and filtering the signal of the target interference frequency from the original signal to obtain a target signal.
7. The interference signal filtering method of claim 6, further comprising:
determining a relevant interference frequency based on the target interference frequency and an interference threshold;
filtering out the signal of the relevant interference frequency from the target signal.
8. An interference signal filtering apparatus applied to an audio apparatus including a first number of transmitting terminals and a second number of receiving terminals, the interference signal filtering apparatus comprising:
a signal receiving module, configured to receive, through a target receiving end, an original signal transmitted by the first number of transmitting ends, where the target receiving end is any one of the second number of receiving ends;
an interference frequency determining module, configured to determine a multi-order intermodulation interference frequency of each transmitting end according to a current transmitting frequency and a working frequency band of each transmitting end of the first number of transmitting ends;
and the signal filtering module is used for filtering the original signal based on the multi-order intermodulation interference frequency of each transmitting terminal.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the interference signal filtering method according to any one of claims 1 to 7 when executing the program.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the interference signal filtering method according to any one of claims 1 to 7.
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