CN108540151B - A kind of method and device for eliminating mono-tone interference - Google Patents
A kind of method and device for eliminating mono-tone interference Download PDFInfo
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- CN108540151B CN108540151B CN201710117570.2A CN201710117570A CN108540151B CN 108540151 B CN108540151 B CN 108540151B CN 201710117570 A CN201710117570 A CN 201710117570A CN 108540151 B CN108540151 B CN 108540151B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03159—Arrangements for removing intersymbol interference operating in the frequency domain
Abstract
The invention discloses a kind of method and devices for eliminating mono-tone interference, it include the input signal of at least one mono-tone interference signal by acquisition, wherein, the corresponding interference frequency point of every kind of mono-tone interference signal, frequency spectrum shift is carried out to the input signal, so that frequency domain position locating for the interference frequency point of each mono-tone interference signal is located at zero-frequency position in input signal after frequency spectrum shift, it is located at the mono-tone interference signal strength at zero-frequency position according to frequency domain position locating for interference frequency point, eliminate the mono-tone interference signal in the input signal, be eliminated the output signal of mono-tone interference signal, solves the higher cost for eliminating mono-tone interference by using the mode for improving hardware design in the prior art, and it can only moderately reduce interference, more difficult the problem of completely eliminating interference.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of method and devices for eliminating mono-tone interference.
Background technique
With the development of wireless communication system, small base station is a kind of following critically important base station form.In order to improve small base
The integrated level stood, usually in the design of the wireless radio transceiver (Transceiver, TRX) of small base station, using based on zero
The design scheme of intermediate frequency technology.
Using the design scheme based on zero intermediate frequency technology, the problems such as there are local oscillator leakages, direct current biasing, and these problems
It is interfered in the presence of zero-frequency can be generated to service signal.In addition, in the high small base station of integrated level, radio frequency link and Digital Signal Processing electricity
Distance is close between road, therefore, hold very much between the digital signal in radiofrequency signal and digital signal processing circuit in radio frequency link
Easily interfere, especially the higher hamonic wave of work clock is easy to be coupled in radio frequency link in digital signal processing circuit,
Cause to generate between digital signal and radiofrequency signal in digital signal processing circuit and couple, and then leads to coupled interference.It is setting
In communication process between standby, the signal emitted between multiple equipment mixed in together may be transmitted, if the transmission of certain equipment
Mixed the signal for the single-frequency that other equipment generate in signal, or due to own signal leakage and in the signal of transmission
A kind of signal of single-frequency is generated, the signal of these single-frequencies will generate the service signal transmitted between equipment dry
It disturbs, the interference of the type is usually known as mono-tone interference, the signal for causing the single-frequency of mono-tone interference is known as mono-tone interference
Signal.Since the interference of above-mentioned zero-frequency and coupled interference are the interference generated by the signal of single-frequency to service signal, that is, adopt
It is mono-tone interference with the zero-frequency interference generated in the design scheme based on zero intermediate frequency technology and coupled interference, the interference of these zero-frequencies
It is usually all more stable with coupled interference, it remains unchanged for a long time substantially.During communication, using based on zero intermediate frequency technology
These mono-tone interferences generated in design scheme will lead to the received bit error rate increase of service signal, signal-to-noise ratio is deteriorated, and interference is tight
When weight, or even it is unable to properly receive service signal.
Currently, it is dry based on the single-frequency in zero intermediate frequency Analyzing on Building A Planning Scheme to eliminate to generally use the mode of improvement hardware design
It disturbs, and uses which to eliminate the higher cost of mono-tone interference, and can only moderately reduce interference, it is more difficult to completely eliminate.
Summary of the invention
The object of the present invention is to provide a kind of method and devices for eliminating mono-tone interference, to solve in the prior art by adopting
The higher cost of mono-tone interference is eliminated with the mode for improving hardware design, and can only moderately reduce interference, it is more difficult to be completely eliminated dry
The problem of disturbing.
The purpose of the present invention is what is be achieved through the following technical solutions:
It include at least one single by obtaining in this method in a first aspect, providing a kind of method for eliminating mono-tone interference
The input signal of frequency interference signal carries out frequency spectrum shift to the input signal, so that every in the input signal after frequency spectrum shift
Frequency domain position locating for the interference frequency point of the one mono-tone interference signal is located at zero-frequency position, according to frequency domain position locating for interference frequency point
Setting in the mono-tone interference signal strength at zero-frequency position, the mono-tone interference signal in the input signal is eliminated, is eliminated
The output signal of mono-tone interference signal.
Wherein, the corresponding interference frequency point of every kind of mono-tone interference signal.
In the embodiment of the present invention, acquisition includes the input signal of at least one mono-tone interference signal, is believed the input
Number frequency spectrum shift is carried out, so that the locating frequency of the interference frequency point of each mono-tone interference signal in input signal after frequency spectrum shift
Domain position is located at zero-frequency position, close by counting since frequency point is located at the signal approximation stationary random signal at zero-frequency position
Like the statistical average of the mono-tone interference signal of stationary random signal, the intensity of the mono-tone interference signal, root can be obtained
It is located at the mono-tone interference signal strength at zero-frequency position according to frequency domain position locating for interference frequency point, eliminates the list in the input signal
Frequency interference signal, the output signal for the mono-tone interference signal that has been eliminated.
Preferably, frequency domain position locating for the interference frequency point, which is located at the mono-tone interference signal strength at zero-frequency position, meets public affairs
Formula:
Wherein, PIIt is located at the mono-tone interference signal strength at zero-frequency position for frequency domain position locating for interference frequency point；
N is the mono-tone interference signal strength being located at zero-frequency position for counting frequency domain position locating for the interference frequency point
Statistics points, wherein N=2m, m is positive integer；
B (n) is the input signal after frequency spectrum shift, and n is positive integer.
Preferably, the statistics points, determine in the following way:
It determines sampling number of the input signal in a frame signal length, determines and be less than or equal to the sampling number,
And meet formula N=2mSampling number, as the statistics count.
In the embodiment of the present invention, statistics points meet formula N=2m, therefore it is adapted to the device using the processing of binary system standard
Part simplifies the process of statistics, and in order to enable the mono-tone interference signal strength of statistics influences small, system on useful service signal
The sampling number point counted according to the input signal in a frame signal length determines, will be less than or equal to the input signal and exist
Sampling number in one frame signal length is counted as the statistics.
Preferably, the mono-tone interference signal strength is defeated according to the former frame of the present frame input signal after frequency spectrum shift
Enter signal statistics.
In the embodiment of the present invention, by what is counted according to the former frame input signal of the present frame input signal after frequency spectrum shift
The mono-tone interference signal strength, the interference for present frame input signal are eliminated, are used for without caching present frame input signal
Interference is eliminated, and resource is saved, and improves the efficiency that interference is eliminated, and take full advantage of the stabilization of the mono-tone interference signal
Property.
Preferably, the mono-tone interference signal eliminated in the input signal, be eliminated mono-tone interference signal
Output signal, comprising:
The intensity of input signal after frequency spectrum shift is subtracted into frequency domain position locating for the interference frequency point and is located at zero-frequency position
The mono-tone interference signal strength at place, the signal of the mono-tone interference signal that has been eliminated, by the mono-tone interference signal that eliminates
Signal carries out inverse frequency spectrum and moves, the output signal for the mono-tone interference signal that has been eliminated.
Second aspect, provides a kind of device for eliminating mono-tone interference, and described device includes:
Acquiring unit, for obtain include at least one mono-tone interference signal input signal, wherein every kind of single-frequency is dry
Disturb the corresponding interference frequency point of signal；
Processing unit, the input signal for obtaining to the acquiring unit carries out frequency spectrum shift, so that frequency spectrum is removed
Frequency domain position locating for the interference frequency point of each mono-tone interference signal is located at zero-frequency position in input signal after shifting, and root
It is located at the mono-tone interference signal strength at zero-frequency position according to frequency domain position locating for interference frequency point, eliminates what the acquiring unit obtained
Mono-tone interference signal in the input signal, the output signal for the mono-tone interference signal that has been eliminated.
Preferably, frequency domain position locating for the interference frequency point, which is located at the mono-tone interference signal strength at zero-frequency position, meets public affairs
Formula:
Wherein, PIIt is located at the mono-tone interference signal strength at zero-frequency position for frequency domain position locating for interference frequency point；
N is the mono-tone interference signal strength being located at zero-frequency position for counting frequency domain position locating for the interference frequency point
Statistics points, wherein N=2m, m is positive integer；
B (n) is the input signal after frequency spectrum shift, and n is positive integer.
Preferably, the processing unit determines the statistics points in the following way:
It determines sampling number of the input signal in a frame signal length, determines and be less than or equal to the sampling number,
And meet formula N=2mSampling number, as the statistics count.
Preferably, the mono-tone interference signal strength is defeated according to the former frame of the present frame input signal after frequency spectrum shift
Enter signal statistics.
Preferably, the processing unit eliminates the mono-tone interference signal in the input signal in the following way, obtain
Eliminate the output signal of mono-tone interference signal:
The intensity of input signal after frequency spectrum shift is subtracted into frequency domain position locating for the interference frequency point and is located at zero-frequency position
The mono-tone interference signal strength at place, the signal of the mono-tone interference signal that has been eliminated, by the mono-tone interference signal that eliminates
Signal carries out inverse frequency spectrum and moves, the output signal for the mono-tone interference signal that has been eliminated.
Detailed description of the invention
Fig. 1 is a kind of method flow diagram for eliminating mono-tone interference provided in an embodiment of the present invention；
Fig. 2 is a kind of method flow diagram of determining statistics points provided in an embodiment of the present invention；
Fig. 3 is a kind of method flow diagram for eliminating the mono-tone interference signal in input signal provided in an embodiment of the present invention；
Fig. 4 is a kind of method schematic diagram for eliminating mono-tone interference provided in an embodiment of the present invention；
Fig. 5 is a kind of schematic device for eliminating mono-tone interference provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention is retouched in detail
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, is not whole embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
In order to solve to eliminate the higher cost of mono-tone interference by using the mode for improving hardware design in the prior art,
And it can only moderately reduce interference, it is more difficult to which the problem of completely eliminating interference, the embodiment of the present invention, which provides, a kind of eliminates mono-tone interference
Method.
Fig. 1 show a kind of method flow diagram for eliminating mono-tone interference provided in an embodiment of the present invention, as shown in Figure 1, packet
It includes:
S101: acquisition includes the input signal of at least one mono-tone interference signal, wherein every kind of mono-tone interference signal pair
Answer an interference frequency point.
In the embodiment of the present invention, using in the design scheme based on zero intermediate frequency technology, the signal received is carried out just
Demodulation, the road I and the road Q two paths of signals after obtaining quadrature demodulation are handed over, and analog-to-digital conversion is carried out to the signal after quadrature demodulation, is obtained
It include the input signal of at least one mono-tone interference signal.
S102: carrying out frequency spectrum shift to the input signal, so that each list in the input signal after frequency spectrum shift
Frequency domain position locating for the interference frequency point of frequency interference signal is located at zero-frequency position.
S103: the mono-tone interference signal strength at zero-frequency position is located at according to frequency domain position locating for interference frequency point, eliminates institute
The mono-tone interference signal in input signal is stated, the output signal for the mono-tone interference signal that has been eliminated.
In the embodiment of the present invention, below by for including a kind of input signal of mono-tone interference signal, disappear to above-mentioned
Except the method for mono-tone interference is described in detail.
In the embodiment of the present invention, using in the design scheme based on zero intermediate frequency technology, it is assumed that the radiofrequency signal received
Interfering frequency is fIrf, the radiofrequency signal received is subjected to quadrature demodulation and carries out analog-to-digital conversion, obtains input signal, it is assumed that
The interfering frequency of numeric field interference signal after analog-to-digital conversion is fI, then the f of the interfering frequency of the radiofrequency signal receivedIrfWith
The interfering frequency f of numeric field after analog-to-digital conversionIBetween relationship be fI=fIrf-fLO, wherein fLOFor zero intermediate frequency quadrature demodulation
Local frequency.
It is now assumed that the input signal is A (n)=IA(n)+j*QA(n), wherein n is positive integer, IAIt (n) is quadrature demodulation
The road I signal afterwards, QAIt (n) is the road the Q signal after quadrature demodulation.
In the embodiment of the present invention, in order to enable the interference frequency point f of mono-tone interference signal described in input signal A (n)IIt is locating
Frequency domain position is located at zero-frequency position, carries out frequency spectrum shift to the input signal A (n), the input letter after obtaining frequency spectrum shift
Number: B (n)=A (n) * exp (- j*2* π * fI*n/fADC)=IB(n)+j*QB(n), wherein fADCFor the sampling frequency of analog-to-digital conversion
Rate, IBIt (n) is the road the I signal after frequency spectrum shift, QBIt (n) is the road the Q signal after frequency spectrum shift.
In the embodiment of the present invention, due to service signal useful in the input signal after frequency spectrum shift be similar to non-stationary with
Machine signal, and in the input signal after frequency spectrum shift, the interference frequency point f of the mono-tone interference signalILocating frequency domain position is located at
At zero-frequency position, i.e., the mono-tone interference signal after frequency spectrum shift is similar to stationary random signal, therefore, after frequency spectrum shift
After input signal asks statistical average, useful service signal intensity is zero in input signal, that is, after passing through statistics frequency spectrum shift
The input signal statistical average, the intensity of the available mono-tone interference signal.
In the embodiment of the present invention, determine that frequency domain position locating for the interference frequency point is located at the mono-tone interference letter at zero-frequency position
Number intensity, following formula can be used:
Wherein, PIBe located at the mono-tone interference signal strength at zero-frequency position for frequency domain position locating for interference frequency point, N for for
Count the statistics points for the mono-tone interference signal strength that frequency domain position locating for the interference frequency point is located at zero-frequency position, wherein N
=2m, m is positive integer；B (n) is the input signal after frequency spectrum shift, and n is positive integer.
In the embodiment of the present invention, since the input signal B (n) after frequency spectrum shift can be expressed as follows:
B (n)=IB(n)+j*QB(n)；
Therefore the intensity P of mono-tone interference signalIIt also may indicate that as follows:
Wherein, IPiAnd QPiRespectively indicate the intensity of the road I signal and the road Q signal that mono-tone interference signal includes.
In the embodiment of the present invention, in order to adapt to the device using the processing of binary system standard, statistics points meet formula N=
2m.Wherein, m is positive integer, and since the value of m is smaller, the amplitude of the input signal B (n) after frequency spectrum shift believes mono-tone interference
The influence of the statistics of number intensity is bigger, and in order to reduce this influence, the value of m should be as big as possible, but the value of m is bigger,
It is longer to the statistics duration of mono-tone interference signal strength, statistics the longer meeting of duration so that mono-tone interference signal frequency accuracy
With stability influence statistical result, so the value of m can not be too big.In summary two factors consider that the present invention uses Fig. 2
Shown in mode determine statistics points, as shown in Figure 2, comprising:
S201: sampling number of the input signal in a frame signal length is determined.
S202: it determines and is less than or equal to the sampling number, and meet formula N=2mSampling number, as the statistics
Points.
In the embodiment of the present invention, it is described in detail below in the method for the example statistics points described determination.
For example, for a TD-LTE uplink data frames including two ascending pilot frequency subframes and a sub-frame of uplink, one
Frame signal length is 1.14ms, sample frequency 30.72msps, therefore can determine the input signal in a frame signal length
Sampling number be 35104, in order to enable N, which meets, is less than or equal to the sampling number, and meet formula N=2m, therefore take N=
32768, i.e. m=15.Statistics points are determined by the above method, simplify the process of statistics.
In the embodiment of the present invention, the mono-tone interference signal strength is according to the present frame input signal after frequency spectrum shift
Former frame input signal statistics.Since mono-tone interference signal is stable, therefore zero is located to frequency domain position locating for interference frequency point
The mono-tone interference signal strength P of mono-tone interference signal statistics at frequency positionIIt is substantially stable, in order to save resource, improve
The efficiency eliminated is interfered, the present invention takes full advantage of the stability of the mono-tone interference signal, will be according to working as after frequency spectrum shift
The mono-tone interference signal strength of the former frame input signal statistics of previous frame input signal, i.e., current mono-tone interference signal strength
The mono-tone interference signal strength of last statistics can be used, do not needed again to current demand signal caching process.For LTE signal,
The mono-tone interference signal strength that the former frame of signal present frame counts can be used for the processing of signal present frame, i.e., every frame to update
Mono-tone interference signal strength.By being united according to the former frame input signal of the present frame input signal after frequency spectrum shift
The mono-tone interference signal strength of meter, the interference for present frame input signal is eliminated, without caching present frame input signal
It is eliminated for interfering, saves resource, improve the efficiency that interference is eliminated, and take full advantage of the steady of the mono-tone interference signal
It is qualitative.
In the embodiment of the present invention, the mono-tone interference signal as described in being eliminated under type in input signal specifically can be used, obtain
To the output signal for eliminating mono-tone interference signal, as shown in Figure 3, comprising:
S301: the intensity of the input signal after frequency spectrum shift is subtracted into frequency domain position locating for the interference frequency point and is located at zero-frequency
Mono-tone interference signal strength at position, the signal for the mono-tone interference signal that has been eliminated.
It is input signal in the example above, after frequency spectrum shift is B (n), the interference frequency point institute in the embodiment of the present invention
Place's frequency domain position is located at the mono-tone interference signal strength at zero-frequency position are as follows:
Therefore B (n) is subtracted into PI, obtain
Eliminate the signal C (n) of mono-tone interference signal:
C (n)=B (n)-PI=IB(n)-IPi+j*(QB(n)-QPi)=IC(n)+j*QC(n)；
Wherein, IC(n) and QCIt (n) is respectively to eliminate the road I signal and the road Q signal after mono-tone interference signal.
S302: the signal for eliminating mono-tone interference signal is subjected to inverse frequency spectrum and is moved, the single-frequency that has been eliminated is dry
Disturb the output signal of signal.
In the embodiment of the present invention, by the signal C (n) for eliminating mono-tone interference signal, carries out inverse frequency spectrum and move, instead
Output to frequency spectrum shift are as follows:
D (n)=C (n) * exp (j*2* π * fI*n/fADC)=ID(n)+j*QD(n)；
Wherein, ID(n) and QD(n) it is respectively the road I signal and the road Q signal after inverse frequency spectrum is moved.
To the signal for eliminating mono-tone interference signal, carries out inverse frequency spectrum and move, be eliminated mono-tone interference signal
Output signal, the output signal are useful service signal.I.e. as in the example above, the D (n) of the output signal is to defeated
Entering signal A (n) to eliminate frequency is fIMono-tone interference signal after signal.
In summary the step of eliminating mono-tone interference, the method signal provided in an embodiment of the present invention for eliminating mono-tone interference
Figure, as shown in Figure 4, comprising:
S401: frequency translation.
In the embodiment of the present invention, which carries out frequency spectrum to the input signal for including at least one mono-tone interference signal and removes
It moves, so that frequency domain position locating for the interference frequency point of each mono-tone interference signal is located at zero in the input signal after frequency spectrum shift
At frequency position.
S402: interference strength statistics.
In the embodiment of the present invention, which carries out interference strength statistics to the input signal after frequency spectrum shift, obtains described
The intensity of mono-tone interference signal.
S403: interference is eliminated.
In the embodiment of the present invention, the step is according to the mono-tone interference signal of signal and determination after frequency spectrum shift
Intensity eliminates mono-tone interference.
S404: reverse frequency is moved.
In the embodiment of the present invention, which carries out reverse frequency for the signal for eliminating interference and moves, and be eliminated single-frequency
The output signal of interference signal.
In the embodiment of the present invention, it should be noted that for using in the design scheme of zero intermediate frequency technology, direct current leakage is produced
Raw zero-frequency interference signal can not need first latter two frequency spectrum shift step, can also latter two first frequency spectrum shift process
In, frequency point f will be interferedIIt is set as 0.
In the embodiment of the present invention, for comprising there are two types of and two or more mono-tone interference signals input signal interference
It eliminates, and to only including that a kind of interference elimination method of input signal of mono-tone interference signal is similar, only by multiple single-frequency
Interference signal press respectively a mono-tone interference signal removing method carry out parallel processing, therefore the present invention to comprising there are two types of and
The interference elimination of the input signal of two or more mono-tone interference signals repeats no more.
A kind of device for eliminating mono-tone interference is also provided in the embodiment of the present invention, the composition of the device is described more fully below
And purposes.
Fig. 5 is a kind of schematic device for eliminating mono-tone interference provided in an embodiment of the present invention, as shown in figure 5, the device
Including acquiring unit 101 and processing unit 102, in which:
Acquiring unit 101, for obtain include at least one mono-tone interference signal input signal, wherein every kind of list
Frequency interference signal corresponds to an interference frequency point；
Processing unit 102, the input signal for obtaining to the acquiring unit 101 carry out frequency spectrum shift, so that
Frequency domain position locating for the interference frequency point of each mono-tone interference signal is located at zero-frequency position in input signal after frequency spectrum shift
Place, and the frequency domain position according to locating for interference frequency point is located at the mono-tone interference signal strength at zero-frequency position, and it is single to eliminate the acquisition
The mono-tone interference signal in the input signal that member 101 obtains, the output signal for the mono-tone interference signal that has been eliminated.
In the embodiment of the present invention, the mono-tone interference signal that frequency domain position locating for the interference frequency point is located at zero-frequency position is strong
Degree meets formula:
Wherein, PIIt is located at the mono-tone interference signal strength at zero-frequency position for frequency domain position locating for interference frequency point；
N is the mono-tone interference signal strength being located at zero-frequency position for counting frequency domain position locating for the interference frequency point
Statistics points, wherein N=2m, m is positive integer；
B (n) is the input signal after frequency spectrum shift, and n is positive integer.
In the embodiment of the present invention, the processing unit 102 determines the statistics points in the following way:
It determines sampling number of the input signal in a frame signal length, determines and be less than or equal to the sampling number,
And meet formula N=2mSampling number, as the statistics count.
In the embodiment of the present invention, the mono-tone interference signal strength is according to the present frame input signal after frequency spectrum shift
Former frame input signal statistics.
In the embodiment of the present invention, it is dry that the processing unit 102 eliminates the single-frequency in the input signal in the following way
Signal is disturbed, the output signal for the mono-tone interference signal that has been eliminated:
The intensity of input signal after frequency spectrum shift is subtracted into frequency domain position locating for the interference frequency point and is located at zero-frequency position
The mono-tone interference signal strength at place, the signal of the mono-tone interference signal that has been eliminated, by the mono-tone interference signal that eliminates
Signal carries out inverse frequency spectrum and moves, the output signal for the mono-tone interference signal that has been eliminated.
In the embodiment of the present invention, acquisition includes the input signal of at least one mono-tone interference signal, is believed the input
Number frequency spectrum shift is carried out, so that the locating frequency of the interference frequency point of each mono-tone interference signal in input signal after frequency spectrum shift
Domain position is located at zero-frequency position, close by counting since frequency point is located at the signal approximation stationary random signal at zero-frequency position
Like the statistical average of the mono-tone interference signal of stationary random signal, the intensity of the mono-tone interference signal, root can be obtained
It is located at the mono-tone interference signal strength at zero-frequency position according to frequency domain position locating for interference frequency point, eliminates the list in the input signal
Frequency interference signal, the output signal for the mono-tone interference signal that has been eliminated.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (6)
1. a kind of method for eliminating mono-tone interference characterized by comprising
Acquisition includes the input signal of at least one mono-tone interference signal, wherein every kind of mono-tone interference signal corresponding one dry
Scrambling point；
Frequency spectrum shift is carried out to the input signal, so that each mono-tone interference signal in the input signal after frequency spectrum shift
Interference frequency point locating for frequency domain position be located at zero-frequency position；
It is located at the mono-tone interference signal strength at zero-frequency position according to frequency domain position locating for interference frequency point, eliminates the input signal
In mono-tone interference signal, the output signal for the mono-tone interference signal that has been eliminated；The mono-tone interference signal strength is basis
The former frame input signal statistics of present frame input signal after frequency spectrum shift；
The mono-tone interference signal eliminated in the input signal, the output signal for the mono-tone interference signal that has been eliminated, packet
It includes:
The intensity of input signal after frequency spectrum shift is subtracted frequency domain position locating for the interference frequency point to be located at zero-frequency position
Mono-tone interference signal strength, the signal for the mono-tone interference signal that has been eliminated；
The signal for eliminating mono-tone interference signal is carried out inverse frequency spectrum to move, be eliminated the defeated of mono-tone interference signal
Signal out.
2. the method as described in claim 1, which is characterized in that frequency domain position locating for the interference frequency point is located at zero-frequency position
Mono-tone interference signal strength meet formula:
Wherein, PIIt is located at the mono-tone interference signal strength at zero-frequency position for frequency domain position locating for interference frequency point；
N is the statistics for being located at the mono-tone interference signal strength at zero-frequency position for counting frequency domain position locating for the interference frequency point
Points, wherein N=2m, m is positive integer；
B (n) is the input signal after frequency spectrum shift, and n is positive integer.
3. method according to claim 2, which is characterized in that the statistics points determine in the following way:
Determine sampling number of the input signal in a frame signal length；
It determines and is less than or equal to the sampling number, and meet formula N=2mThe first sampling number, as the statistics count.
4. a kind of device for eliminating mono-tone interference characterized by comprising
Acquiring unit, for obtain include at least one mono-tone interference signal input signal, wherein every kind of mono-tone interference letter
A number corresponding interference frequency point；
Processing unit, for carrying out frequency spectrum shift to the input signal, so that each institute in the input signal after frequency spectrum shift
It states frequency domain position locating for the interference frequency point of mono-tone interference signal to be located at zero-frequency position, and the frequency domain position according to locating for interference frequency point
Mono-tone interference signal strength at zero-frequency position eliminates the mono-tone interference signal in the input signal, is eliminated
The output signal of mono-tone interference signal；The mono-tone interference signal strength is according to the present frame input signal after frequency spectrum shift
Former frame input signal statistics；
The processing unit eliminates the mono-tone interference signal in the input signal in the following way, and the single-frequency that has been eliminated is dry
Disturb the output signal of signal:
The intensity of input signal after frequency spectrum shift is subtracted frequency domain position locating for the interference frequency point to be located at zero-frequency position
Mono-tone interference signal strength, the signal for the mono-tone interference signal that has been eliminated；
The signal for eliminating mono-tone interference signal is carried out inverse frequency spectrum to move, be eliminated the defeated of mono-tone interference signal
Signal out.
5. device as claimed in claim 4, which is characterized in that frequency domain position locating for the interference frequency point is located at zero-frequency position
Mono-tone interference signal strength meet formula:
Wherein, PIIt is located at the mono-tone interference signal strength at zero-frequency position for frequency domain position locating for interference frequency point；
N is the statistics for being located at the mono-tone interference signal strength at zero-frequency position for counting frequency domain position locating for the interference frequency point
Points, wherein N=2m, m is positive integer；
B (n) is the input signal after frequency spectrum shift, and n is positive integer.
6. device as claimed in claim 5, which is characterized in that the processing unit determines the statistics point in the following way
Number:
Determine sampling number of the input signal in a frame signal length；
It determines and is less than or equal to the sampling number, and meet formula N=2mThe first sampling number, as the statistics count.
Priority Applications (1)
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| CN101098396A (en) * | 2006-06-29 | 2008-01-02 | 上海高清数字科技产业有限公司 | Method and apparatus for eliminating signal interference |
| WO2009143736A1 (en) * | 2008-05-31 | 2009-12-03 | 华为技术有限公司 | Method and device eliminating interference in signals in short range wireless network |
| CN102664843A (en) * | 2012-03-02 | 2012-09-12 | 北京大学 | Method and device for single-frequency interference detection and elimination |
| CN104639190A (en) * | 2014-12-19 | 2015-05-20 | 大唐半导体设计有限公司 | Analog front-end system of frequency modulation receiver and processing method thereof |
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| CN101098396A (en) * | 2006-06-29 | 2008-01-02 | 上海高清数字科技产业有限公司 | Method and apparatus for eliminating signal interference |
| WO2009143736A1 (en) * | 2008-05-31 | 2009-12-03 | 华为技术有限公司 | Method and device eliminating interference in signals in short range wireless network |
| CN102664843A (en) * | 2012-03-02 | 2012-09-12 | 北京大学 | Method and device for single-frequency interference detection and elimination |
| CN104639190A (en) * | 2014-12-19 | 2015-05-20 | 大唐半导体设计有限公司 | Analog front-end system of frequency modulation receiver and processing method thereof |
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