CN107222226A

CN107222226A - The method and apparatus of harmonic carcellation interference

Info

Publication number: CN107222226A
Application number: CN201610160793.2A
Authority: CN
Inventors: 张志伟
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-03-21
Filing date: 2016-03-21
Publication date: 2017-09-29
Anticipated expiration: 2036-03-21
Also published as: CN107222226B

Abstract

Present applicant proposes a kind of method of harmonic carcellation interference, including：The harmonic wave amount of moving is determined, the harmonic wave amount of moving is the difference between the harmonic wave interference frequency and the center frequency point of the reception signal；According to the reception signal and the harmonic wave amount of moving, the harmonious wave phase of harmonic amplitude for the harmonic interference signals that the reception signal includes is determined；According to the harmonic amplitude and the harmonic phase, the harmonic interference signals are determined；The harmonic interference signals are subtracted from the reception signal, to cause the harmonic interference signals in the reception signal to be eliminated.Therefore, method described herein, the harmonic signal docking collection of letters number interference brought efficiently solved, and the sensitivity behaviour of receiver is improved, make the performance of receiver is not influenceed by harmonic signal intensity, with higher robustness.

Description

The method and apparatus of harmonic carcellation interference

Technical field

The present invention relates to the method for the interference of the harmonic carcellation in the communications field, more particularly to the communications field and dress Put.

Background technology

Arrowband interference needs the major issue solved when being wireless reception of signals processing.Clock harmonic is done Disturb be arrowband interference one kind, it is a kind of interference signal of single-frequency point.The producing cause of harmonic wave interference has Radio frequency (Radio Frequency, referred to as " RF ") crystal oscillator harmonic wave and ABB (Analog Base Band, Referred to as " ABB ") sampling clock harmonic wave etc. is originated, when the harmonic component of crystal oscillator or sampling clock is coupled to RF high frequencies input port, then by blender (Mixer) after, reform into receive signal the interior interference of band.

As RF chip areas more do smaller, and smart terminal product wiring is more and more closeer, and harmonic wave is done The problem of disturbing can be more intractable.In general, the energy of harmonic wave interference is fixed, thus when receiver from Base station farther out when, signal energy can be far below interfering energy.Therefore harmonic wave interference can cause to receive signal spirit Sensitivity severe exacerbation, causes the problem of net etc. has a strong impact on Consumer's Experience.Meanwhile, during middle high s/n ratio Handling capacity also have greater loss, harmonic wave interference is stronger, and caused performance loss is bigger.

The content of the invention

In view of this, it is humorous to solve the embodiments of the invention provide a kind of method and apparatus of harmonic carcellation The interference problem of the ripple docking collection of letters number.So as to avoid receiving signal sensitivity caused by harmonic wave interference from disliking The problem of changing, fall the influence Consumer's Experience such as net, and reduce performance loss.

There is provided a kind of method that harmonic carcellation is disturbed for first aspect, it is characterised in that harmonic wave interference frequency Point is located in the reception bandwidth for receiving signal, and methods described includes：

The harmonic wave amount of moving is determined, the harmonic wave amount of moving is the harmonic wave interference frequency and the reception signal Center frequency point between difference；

According to the reception signal and the harmonic wave amount of moving, the harmonic wave that the reception signal includes is determined The harmonious wave phase of the harmonic amplitude of interference signal；

According to the harmonic amplitude and the harmonic phase, the harmonic interference signals are determined；

The harmonic interference signals are subtracted from the reception signal, to cause the institute in the reception signal Harmonic interference signals are stated to be eliminated.

Therefore, method described herein, it is dry that the harmonic signal docking collection of letters number efficiently solved is brought Disturb, and improve the sensitivity behaviour of receiver, make the performance of receiver not by harmonic signal intensity Influence, with higher robustness.

It is described according to the reception signal and the harmonic wave amount of moving as another embodiment, determine institute The harmonious wave phase of harmonic amplitude for receiving the harmonic interference signals that signal includes is stated, including：

According to the harmonic wave amount of moving, the harmonic wave interference frequency is moved to the center of the reception signal The position of frequency；

According to the signal value of each sampled point of the reception signal in unit length, connect described in calculating The average value of the collection of letters number；

According to the average value of the reception signal, the harmonic wave interference that the reception signal includes is determined The harmonic amplitude and the harmonic phase of signal.

Alternatively, it is assumed that crystal oscillator fundamental frequency is F, the center frequency point for receiving signal is f_c, harmonic wave interference frequency For f_i, then f=f_i-f_cThe amount of moving of Harmonics elimination can be defined as.Wherein, center frequency point f_cWith Harmonic wave interference frequency f_iIt can be expressed as：

f_c=F × (N+1/M) (1)

f_i=F × N (2)

Wherein, N represents the integer frequency of crystal oscillator, and 1/M represents decimal frequency multiplication, and cps are Hz.

Alternatively, it is determined that before the harmonic wave amount of moving, methods described also includes：Determine the harmonic wave interference Frequency is located in the reception bandwidth of the reception signal.

Assuming that reception bandwidth is BW, then when interference frequency and center frequency point interval | f_i-f_c| during≤BW/2, Think that interference falls in reception bandwidth.Now, the baseband receiving signals with harmonic wave interference can be expressed as：

Y (t)=x (t)+Ae^j(2πf+θ)+n(t) (3)

Wherein, f=f_i-f_cFor the amount of moving of Harmonics elimination, A is harmonic amplitude, and θ is harmonic phase. In addition, n (t) represents to receive the noise section of signal, x (t) represents noiseless and noise signal section, Ae^j(2πf+θ)Represent the harmonic interference signals of reception signal.

By the way that signal y (t) and e will be received^-j2πftCM is carried out, realizes and moves harmonic wave frequency to center frequency Point position.Reception signal y'(t after being moved).

Y'(t)=y (t) × e^-j2πft=[x (t)+n (t)] × e^-j2πft+Ae^jθ (7)

In formula (7), [x (t)+n (t)] × e^-j2πftThe signal modulated for single-tone, if [x (t)+n (t)] phase For single-tone amplitude very little (sensitivity scene meets the hypothesis), then after the single-tone number of cycles time that adds up, The result of this is intended to 0, that is, obtains the result shown in formula (8)：

According to formula (8), it is estimated that the harmonious wave phase of the harmonic amplitude of harmonic interference signals.

Alternatively, for demodulation modes and alien frequencies pattern, it is assumed that frequency deviation is Δ f, then receives the center of signal Frequency f_cHarmonious wave interference frequency f_iRespectively：

f_c=(F+ Δs f) × (N+1/M) (4)

f_i=(F+ Δs f) × N (5)

The nominal harmonic wave amount of moving can be calculated for f=f according to formula (1) and (2)_i-f_c=F × (1/M), But when there is frequency deviation Δ f, the interval is actual for f'=(F+ Δs f) × (1/M), and automatic frequency control mould The frequency deviation value of block estimation is f_AFC=Δ f (N+1/M), frequency deviation scale factor is Fratio=Δs f/F.Therefore, Calculated using Given information and be actually needed the harmonic wave amount of moving used and be：

When there is frequency deviation, it is believed that harmonic wave interference frequency is f+ Δ f relative to the distance of center frequency point, Then：

Y'(t)=y (t) × e^-j2πft=[x (t)+n (t)] × e^-j2πft+Ae^j2πΔfte^jθ (9)

Because Δ f is relatively small, therefore e^j2πΔftCycle it is very long, it is believed that in one section of sampling point, the list Message e^j2πΔftAmplitude and phase be constant, therefore the segment data can be added up and is averaging, So as to estimate the amplitude and phase of harmonic interference signals, and for eliminating the harmonic wave interference of lower one piece of data.

Alternatively, it is determined that before the harmonic wave amount of moving, methods described also includes：Determine the reception signal Unit length, and according to the unit length to it is described reception signal be segmented, the unit length is represented Any one segment signal in the reception signal, the sampling number that for example the n-th segment signal includes is described N is positive integer and n is less than or equal to total hop count that reception signal can be divided into, or is received in signal The total hop count estimated for harmonic wave.

It should be understood that determine after the harmonic interference signals in n-th segment signal, can be according to n-th section of utilization The harmonic interference signals that signal is estimated, to eliminate the harmonic interference signals in the (n+1)th segment signal, according to The harmonic interference signals that (n+1)th segment signal is estimated, to eliminate the letter of the harmonic wave interference in the n-th+2 segment signal Number, the like.The harmonic interference signals that can also be estimated according to the n-th segment signal, it is follow-up to eliminate All signals or any one segment signal or multi-segment signal.

Therefore, because we employ the mode of segmentation, the result that present segment is estimated is used for next hop count According to being a kind of mode of stream treatment in realization, such processing mode is to hard-wired timing requirements It is very low, simplify module implementation complexity.

On the other hand, except the first segment data does not have estimated result, it is impossible to carry out outside Harmonics elimination, subsequently Data estimate all comes into force in real time, therefore solves and need to wait that parameter is convergent asks in the prior art Topic.

As another embodiment, before the determination harmonic wave amount of moving, methods described also includes：

According to the size of the frequency shift (FS) of the reception signal, Harmonics elimination pattern is determined, the harmonic wave disappears Except pattern includes grade mode, demodulation modes or alien frequencies pattern.

According to the Harmonics elimination pattern, the number of the sampled point in the unit length, the list are determined The number of sampled point in bit length and the size of the frequency shift (FS) are inversely proportional.

It should be understood that the Harmonics elimination pattern can be drawn in more detail as needed when product is realized Point, it is described to determine Harmonics elimination pattern institute basis principle to need the big of residual frequency offset to be processed It is small.

Wherein, when the Harmonics elimination pattern is demodulation modes, unit length can be 1024；Work as institute When stating Harmonics elimination pattern for alien frequencies pattern, unit length can be 256；When the Harmonics elimination pattern During for grade mode, unit length can be 128.

As another embodiment, when it is determined that the Harmonics elimination pattern is demodulation modes or alien frequencies pattern, Or the harmonic wave interference frequency be not present the frequency shift (FS) when, the determination harmonic wave amount of moving, including：

According to the size of the frequency shift (FS), determine in the harmonic wave interference frequency and the reception signal Heart frequency；

According to the center frequency point of the harmonic wave interference frequency and the reception signal, determine that above-mentioned harmonic wave is moved Amount.

It is used as another embodiment, when it is determined that the Harmonics elimination pattern is grade mode, the determination The harmonic wave amount of moving, including：

According to the size of the frequency shift (FS) of the harmonic wave interference frequency, the harmonic wave interference frequency and institute are determined State center frequency point；

According to the harmonic wave interference frequency and the center frequency point, the first harmonic amount of moving is determined, second humorous The ripple amount of moving and the third harmonic amount of moving, the second harmonic amount of moving are moved less than the first harmonic Amount, the third harmonic amount of moving is more than the first harmonic amount of moving, and the first harmonic amount of moving It is equal to the third harmonic amount of moving with the difference of the second harmonic amount of moving and the first harmonic is removed The difference of shifting amount；

From the first harmonic amount of moving, the second harmonic amount of moving and the third harmonic amount of moving In, select the harmonic wave amount of moving.

As another embodiment, it is described to be moved from the first harmonic amount of moving, the second harmonic In amount and the third harmonic amount of moving, the harmonic wave amount of moving is selected, including：

According to the reception signal, and the first harmonic amount of moving, the second harmonic amount of moving and The third harmonic amount of moving, it is determined that with the first harmonic amount of moving, the second harmonic amount of moving and The one-to-one first harmonic interference signal of the third harmonic amount of moving, second harmonic interference signal and Three harmonic interference signals；

It is dry according to the first harmonic interference signal, the second harmonic interference signal and the third harmonic Disturb signal, it is determined that with the first harmonic interference signal, the second harmonic interference signal and the described 3rd One-to-one first signal power of harmonic interference signals, secondary signal power and the 3rd signal power；

Determine in first signal power, the secondary signal power and the 3rd signal power most The corresponding harmonic wave amount of moving of big signal power is the target harmonic wave amount of moving；

In multiple unit lengths that the reception signal includes, the first harmonic is counted respectively and is moved Amount, the second harmonic amount of moving and the third harmonic amount of moving are targeted the harmonic wave amount of moving Number of times；

It is the harmonic wave amount of moving to determine the corresponding harmonic wave amount of moving of the number of times maximum.

Alternatively, for grade mode, according to formula (6), according to the harmonic wave amount of moving be f, f- Δ f' and F+ Δs f' tri- frequencies determine the harmonic wave amount of moving.Such as Δ f'=10KHz, it is assumed that sampling rate is 30.72Msps, 1ms include 30720 sampling points, and unit length is 128, then receive data and altogether may be used To carry out (30720-4096)/128=208 sections of calculating.For every one piece of data, it is utilized respectively [f-10KHz, f, f+10KHz] these three amounts of moving calculate the harmonic wave width of each self-corresponding harmonic interference signals The harmonious wave phase of degree, it is possible to obtain these three amounts of moving and distinguish corresponding harmonic interference signals.Utilize public affairs Formula P=I²+Q²The corresponding power of three harmonic interference signals is calculated respectively, and wherein I represents plural harmonic wave letter Number imaginary part, Q represents the real part of plural harmonic signal.Alpha (Alpha) filtering is carried out afterwards, Maximum therein is compared, and the corresponding harmonic wave amount of moving of the maximum is defined as target harmonic wave and is moved Amount.The corresponding counter of the harmonic wave amount of moving for being targeted the harmonic wave amount of moving plus 1 simultaneously.Institute State and receive in multiple unit lengths for including of signal, count the first harmonic amount of moving, described second humorous The ripple amount of moving and the third harmonic amount of moving are targeted the number of times of the harmonic wave amount of moving, and its is right The harmonic wave amount of moving answered is as the gear estimated, the Harmonics elimination for follow-up sampling point.It is humorous when determining After gear where the ripple amount of moving, the harmonic wave for carrying out receipt of subsequent according still further to the mode for fixing the harmonic wave amount of moving is estimated Meter and elimination.

As another embodiment, methods described also includes：

The signal of each sampled point of the direct current signal in unit length in the reception signal Value, calculates the average value of the direct current signal；

The average value of the direct current signal is subtracted from the reception signal, to cause in the reception signal The direct current signal be eliminated.

Second aspect there is provided the device that a kind of harmonic carcellation is disturbed, for perform above-mentioned first aspect or Method in any possible implementation of first aspect.Specifically, the device of harmonic carcellation interference Including：

First determining module, for determining the harmonic wave amount of moving, the harmonic wave amount of moving is the harmonic wave interference Difference between the center frequency point of frequency and the reception signal；

First determining module is additionally operable to：

Processing module, for subtracting the described humorous of the first determining module determination from the reception signal Interference wave signal, to cause the harmonic interference signals in the reception signal to be eliminated.

Therefore, the device of the harmonic carcellation interference described in the embodiment of the present invention, can efficiently solve harmonic wave The signal docking collection of letters number interference problem brought, and the sensitivity behaviour of receiver is improved, make reception The performance of machine is not influenceed by harmonic signal intensity, with higher robustness.

The third aspect is including processor, memory, total there is provided the device that a kind of harmonic carcellation is disturbed Linear system system, receiver and transmitter, the transmitter and the receiver are respectively used to the process in communication In send and receive information, the memory is used for store instruction, and the processor is used to perform described deposit The instruction of reservoir storage, and to the execution of instruction that is stored in the memory so that the computing device the Method in the possibility implementation of the either side of one side or first aspect.Specifically, the processing Implement body is used for：

Fourth aspect is there is provided a kind of computer-readable medium, for storing computer program, the calculating Machine program includes being used to perform the method in any possible implementation of first aspect or first aspect Instruction.

Based on above-mentioned technical proposal, the method for the harmonic carcellation interference of the embodiment of the present invention is efficiently solved Harmonic signal docking collect mail number interference brought, and improve the sensitivity behaviour of receiver, make to connect The performance of receipts machine is not influenceed by harmonic signal intensity, with higher robustness.

Brief description of the drawings

In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be in the embodiment of the present invention The required accompanying drawing used is briefly described, it should be apparent that, drawings described below is only this Some embodiments of invention, for those of ordinary skill in the art, are not paying creative work Under the premise of, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is the scheme of the frequency domain harmonic elimination of prior art.

Fig. 2 is the scheme of the time harmonic elimination of prior art.

Fig. 3 is the structural representation of the wireless receiver of the embodiment of the present invention.

Fig. 4 is the indicative flowchart of the method for the harmonic carcellation interference of the embodiment of the present invention.

Fig. 5 is the indicative flowchart of the method for the harmonic carcellation interference of the embodiment of the present invention.

Fig. 6 is the schematic block diagram of the gear estimation of the grade mode of the embodiment of the present invention.

Fig. 7 is the amplitude and the schematic flow of phase of the determination harmonic interference signals of the embodiment of the present invention Figure.

Fig. 8 is the schematic block diagram of the method for the harmonic carcellation interference of the embodiment of the present invention.

Fig. 9 is the schematic diagram of the device of the harmonic carcellation interference of the embodiment of the present invention.

Figure 10 is the schematic diagram of the device of the harmonic carcellation interference of the embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out Clearly and completely describe, it is clear that described embodiment is a part of embodiment of the present invention, without It is whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making wound The every other embodiment that the property made is obtained on the premise of working, should all belong to the scope of protection of the invention.

Typical Harmonics elimination scheme, is divided into two kinds of frequency domain and time domain at present.Fig. 1 is the frequency of prior art The scheme that domain harmonic is eliminated.As shown in figure 1, frequency domain harmonic is eliminated passes through Fourier by reception signal first Conversion (Fourier Transform, referred to as " FFT ") transforms to frequency domain, and each frequency signal is counted afterwards Power and judged with threshold value set in advance, more than threshold value then be considered interference.Finally it will determine that Zero is set to for the frequency of interference, or is set to the mean power of adjacent frequency.But the frequency domain harmonic is eliminated Scheme has the disadvantages that：1st, frequency domain harmonic processing is simply suppressed to interference, incomplete Eliminate, therefore also need to the module such as channel estimation and demodulation and do corresponding processing 2, due to being on frequency domain Processing, the receiver signal procesing in time domain part interference effect that for example AGC, cell searching etc. are subject to do not have Method is eliminated.3rd, frequency domain harmonic, which is eliminated, is only used for the scene that harmonic wave is far above signal, because in decline letter Under road, the fluctuation of signal in itself just has more than 8 decibels (Decible, referred to as " dB "), Interference Detection Probability of miscarriage of justice it is very big.4th, when product is realized, cost of implementation and complexity, FFT points are limited to Can not possibly be too big, when harmonic wave is not the integral multiple of FFT subcarriers, the influence of harmonic wave interference can be diffused into On multiple subcarriers.

Fig. 2 is the scheme of the time harmonic elimination of prior art.Typical method is by adaptive iteration Algorithm, trains the corresponding notch filter (Notch Filter) of interference frequency, time-domain signal is through filtering The purpose for eliminating interference is reached after ripple, the notch filter that should be obtained by adaptive iteration algorithm can letter Referred to as adaptive notch filter.But this method has the disadvantages that：1st, Notch Filter depth and width Degree needs to be adjusted according to interference strength.Because the sub-carrier number of different interference intensity influence is different, if Frequency will definitely not be caused interference with and adjacent subcarrier is eliminated not enough or crossed and eliminates by putting, and algorithm robustness is difficult Ensure.2nd, the convergence time of adaptive algorithm is relevant with interference strength, when interference strength ratio letter on frequency domain Number high when being less than 10dB, convergence time needs access to a subframe, and now interference can not be completely eliminated.

In consideration of it, the embodiment of the present invention is directed to the problems such as too many robustness of existing scheme constraints is inadequate, Propose a kind of average Harmonics elimination scheme of Time Domain Piecewise for realizing simple, performance robust.

Because clock harmonic frequency is crystal oscillator fundamental frequency or ABB (Analog Base Band, abbreviation " ABB ") sampling clock integral multiple, therefore the harmonic wave frequency may fall frequency position be fixed 's.Therefore, the problem of several frequencies only fixed on actual product plate can have harmonic wave interference.

Obtained it should be understood that these frequencies can be tested in laboratory, and it is humorous for carrying out as Given information Ripple is eliminated, it would however also be possible to employ other methods of estimation are obtained, and the present invention is not limited this.

Fig. 3 is the structural representation of the wireless receiver of the embodiment of the present invention.Fig. 3 shows wireless receiving The RF modules 310 of machine, analog-digital converter (Analog-to-Digital Converter, referred to as " ADC ") 320th, harmonic management module 330, automatic growth control (Automatic Gain Control, referred to as " AGC ") Module 340, channel estimation module 350, cell search module 360, demodulation module 370, automatic frequency Control (Automatic Frequency Control, referred to as " AFC ") module 380 and decoding module 390. The signal that RF modules 310 are received carries out analog-to-digital conversion in analog-digital converter 320, then in harmonic wave The elimination of harmonic interference signals is carried out in processing module 330.Harmonic management module 330 is located at ADC moulds After block 320, for implementing the harmonic wave in the described harmonic Elimination Method docking collection of letters number according to the present invention Interference is eliminated.The multiplication factor that AGC modules 340 are used to dock the collection of letters number automatically adjusts, Channel estimation module 350 is used to, when receiving signal, estimate the relevant parameter of channel.With being followed by The collection of letters number is demodulated decoding in demodulation module 370 and decoding module 390 respectively.In addition, if with Family equipment is in cell search phase, then perform cell search phase by cell search module 360 Work, such as the initial synchronisation between user equipment and base station, wherein, AFC module 380 be used for pair The frequency shift (FS) situation for receiving signal is estimated, to obtain the frequency offset estimate f and frequency that receive channel The rate shift ratio factor.

Fig. 4 is the indicative flowchart of the method for the harmonic carcellation interference of the embodiment of the present invention.Shown in Fig. 4 Method can be performed by harmonic management module 330, the method for the Harmonics elimination includes：

410, determine the harmonic wave amount of moving, the harmonic wave amount of moving is the harmonic wave interference frequency and described connect Difference between the center frequency point of the collection of letters number.

420, according to the reception signal and the harmonic wave amount of moving, determine that the reception signal includes Harmonic interference signals the harmonious wave phase of harmonic amplitude.

430, according to the harmonic amplitude and the harmonic phase, determine the harmonic interference signals.

440, the harmonic interference signals are subtracted from the reception signal, to cause the reception signal In the harmonic interference signals be eliminated.

Specifically, harmonic management module 330 is according to harmonic wave interference frequency and the center frequency point for receiving signal Position, calculate the harmonic wave amount of moving, the harmonic wave amount of moving be the harmonic wave interference frequency and the center frequency point it Between difference.Then harmonic management module 330 is estimated and connect according to signal and the harmonic wave amount of moving is received Collect mail the harmonious wave phases of harmonic amplitude of number harmonic interference signals included, and according to this estimate it is humorous Wave amplitude harmony wave phase, reconstructs harmonic interference signals.So as to be subtracted from follow-up reception signal The harmonic interference signals, to realize the elimination to harmonic interference signals.Wherein, the harmonic wave amount of moving also may be used Frequency is moved to be referred to as harmonic wave.

Alternatively, before carrying out the method, harmonic management module 330 can first determine the reception signal Unit length, and the reception signal is segmented according to the unit length, the unit length represents this Any one segment signal in signal, the sampling number that for example the n-th segment signal includes are received, the n is Positive integer and n, which are less than or equal to, receives total hop count that signal can be divided into, or receives and be used in signal Total hop count of harmonic wave estimation.Unit length is for example represented with L here, represents to include L per segment signal Individual sampled point.

Specifically, harmonic management module 330 determines the unit length of the reception signal, and according to the unit The length docking collection of letters number is segmented.Then to the n-th segment signal therein, wrapped in the n-th segment signal of estimation The harmonious wave phase of the harmonic amplitude of the harmonic interference signals included, and the harmonic amplitude estimated according to this is harmonious Wave phase, reconstructs harmonic interference signals.So as to be subtracted in the (n+1)th segment signal from signal is received The harmonic interference signals, with the elimination of the harmonic interference signals of other segment signals in the collection of letters number that achieves a butt joint.

Because we are by the way of segmentation, the result of present segment estimation is used in lower one piece of data, realization It is a kind of mode of stream treatment, such processing mode is very low to hard-wired timing requirements, simplifies Module implementation complexity.

On the other hand, except the first segment data does not have estimated result, it is impossible to carry out outside Harmonics elimination, subsequently Data estimate all comes into force in real time, therefore parameter is convergent asks in the absence of needing to wait in the prior art Topic.

It should be understood that harmonic management module 330 is reconstructed after the harmonic interference signals in the n-th segment signal, can It is humorous in the (n+1)th segment signal to eliminate with according to the harmonic interference signals estimated using the n-th segment signal Interference wave signal, the harmonic interference signals estimated according to the (n+1)th segment signal, to eliminate the n-th+2 sections letters Harmonic interference signals in number, the like.Harmonic management module 330 can also be according to the n-th segment signal The harmonic interference signals estimated, to eliminate follow-up all signals or any one segment signal or multistage letter Number, the present invention is not limited this.

It should also be understood that for sake of simplicity, being carried out below just for exemplified by the n-th segment signal in the reception signal Illustrate, i.e., the reception signal in describing below all refers to n-th segment signal.

It is specifically described respectively to 410 to 440 with reference to Fig. 4 to Fig. 8.

Harmonic management module 330 can determine unit length according to the business scenario being presently in, so that Different Harmonics elimination patterns is used according to different unit lengths, so that the targetedly docking collection of letters number In harmonic wave interference eliminated.

Alternatively, as another embodiment, before the determination harmonic wave amount of moving, methods described is also Including：

Although the frequency of harmonic wave interference is fixed, on actual product, all there is deviation in crystal oscillator, Receiver is caused to there is frequency shift (FS) (later referred to as frequency deviation).AFC module 380 in receiver leads to Cross reception signal estimation frequency deviation value, and the progress frequency deviation compensation in RF modules 310 or base band.In AFC Module 380 is after AFC is calibrated, and system residual frequency deviation is general at hundreds of hertz (Hertz, referred to as " Hz ") Within, it is smaller to inventive algorithm performance impact.But initial cell search, frequency sweep in practical application , AFC is no convergent, and frequency deviation now is likely to be breached 15KHz or so in the stage.For cell Just the AFC such as searching does not have convergent scene, simulating, verifying, and inventive algorithm can ensure frequency deviation certain In the range of cell searching performance when within frequency range, such as 5KHz.Therefore calculated using frequency deviation stepping Method, is respectively that tri- frequencies of f, f- Δ f' and f+ Δ f' estimate harmonic wave according to the harmonic wave amount of moving, wherein Δ f' is Stepping step-length, then selects the most strong progress of interference estimate power to eliminate from three frequencies.Here The 5KHz of citing processing energy can be configured according to the concrete condition of real application systems.In addition, Stepping step delta f' can also be configured according to the concrete condition of real application systems, for example here with Illustrated exemplified by Δ f'=10KHz, i.e., respectively according to the harmonic wave amount of moving be f, f-10KHz and F+10KHz tri- frequencies estimate harmonic wave.

Therefore, in embodiments of the present invention, according to the size of residual frequency departure, Harmonics elimination is divided into stepping Pattern (application scenarios such as respective cell initial ranging, frequency sweep and BUCKET-BASED SEARCHING BACKGROUNDSearch), demodulation modes (demodulation, The scenes such as common frequency measurement) and the Harmonics elimination pattern such as alien frequencies pattern (scene such as alien-frequency district search).Such as Shown in table 1, corresponding unit length L is different under different Harmonics elimination patterns.Table 1 is different Parameter configuration table under Harmonics elimination pattern.Wherein, table one is with Long Term Evolution (Long Term Evolution, referred to as " LTE ") receiver exemplified by, its parameter setting correspondence 30.72Msps sampling Speed.

Parameter configuration table under the different Harmonics elimination patterns of table 1

It should be understood that can be divided in more detail as needed when product is realized, basis principle is exactly needed The size of residual frequency departure to be processed, the present invention is not limited Harmonics elimination mode division.

Alternatively, as another embodiment, before performing 410, the method for harmonic carcellation interference Also include：

Determine that harmonic wave interference frequency is located in the reception bandwidth for receiving signal.

Specifically, when the working frequency points and reception bandwidth of the determination reception signal of harmonic management module 330, and Determine that the interference frequency of harmonic interference signals falls in reception bandwidth.Afterwards further according to different frequency deviation sizes To select suitable Harmonics elimination pattern to eliminate harmonic wave interference.

To sum up describe, the idiographic flow of the method for the Harmonics elimination of the embodiment of the present invention is summarized as figure by we 5.Fig. 5 is the indicative flowchart of the method for the harmonic carcellation interference of the embodiment of the present invention.Shown in Fig. 5 Method can be performed by harmonic management module 330.This method is specifically included：

510, it is determined that whether there is harmonic interference signals in current reception bandwidth.

520, it is determined that receiving the working frequency points and reception bandwidth of signal.

530, judge whether harmonic wave interference frequency falls in reception bandwidth.

Specifically, it is assumed that the center frequency point for receiving signal is f_i, harmonic wave interference frequency is f_i, receive signal Bandwidth of operation be BW.Harmonic wave interference module 330 judges | f_i-f_c| whether less than or equal to BW/2, when Meet | f_i-f_c| during≤BW/2, it is believed that harmonic wave interference frequency is located in the reception bandwidth for receiving signal.

540, Harmonics elimination pattern is determined according to current business scene.

Specifically, if harmonic wave interference frequency is located in the reception bandwidth for receiving signal, it is necessary to the harmonic wave Interference is eliminated, and harmonic management module 330 combines table 1, selects needs to make according to current business scene Harmonics elimination pattern.The selection of the Harmonics elimination pattern is that the frequency deviation really under different scenes is big Small decision.

550, selection grade mode is eliminated to harmonic wave interference.

When specifically, under the scenes such as initial cell search, frequency sweep and BUCKET-BASED SEARCHING BACKGROUNDSearch, due to the scene There is no convergent during lower AFC, frequency deviation now is very big, therefore the selection stepping of harmonic management module 330 Pattern carries out follow-up harmonic wave interference elimination work.

551, stepping frequency and unit length are determined under grade mode.

Wherein, corresponding unit length is shorter under the grade mode, and needs and judge harmonic wave gear, i.e., Perform 552.Here different harmonic wave gears can correspond to these three differences of f, f- Δ f' and f+ Δ f' respectively The harmonic wave amount of moving.Each harmonic wave amount of moving in f, f- Δ f' and f+ Δ f' corresponds to a gear.

552, grade mode judges harmonic wave gear.

Specifically, harmonic management module 330 is from f, f- Δ f' and f+ Δ f' these three harmonic wave amounts of moving The most strong progress of selection interference estimate power is eliminated.Specifically judge that the mode of harmonic wave gear is right later Specifically described in the elaboration of 430 parts.

553, harmonic wave estimation and eliminate under grade mode.

560, selection demodulation modes are eliminated to harmonic wave interference.

Specifically, the frequency deviation produced when carrying out the work such as common frequency measurement and demodulation is smaller, therefore at harmonic wave Manage the selection demodulation modes of module 330 and carry out follow-up harmonic wave interference elimination work.

561, stepping frequency and unit length are determined under demodulation modes.

Wherein, corresponding unit length is longer under the grade mode.

562, harmonic wave estimation and eliminate under demodulation modes.

570, selection alien frequencies pattern is eliminated to harmonic wave interference.

Specifically, when carrying out alien-frequency district search, the selection alien frequencies pattern of harmonic management module 330 is determined Harmonic interference signals are simultaneously eliminated to it.

571, stepping frequency and unit length are determined under demodulation modes.

Wherein, corresponding unit length is longer under the grade mode.

572, harmonic wave estimation and eliminate under demodulation modes.

Harmonic management module 330 is after it have selected Harmonics elimination pattern, according to its corresponding unit length, And the harmonic wave amount of moving calculated, the estimation of harmonic interference signals amplitude and phase is carried out in 420. Specifically, harmonic management module 330 is wrapped according to the signal harmonic amount of moving is received it is determined that receiving in signal The harmonious wave phase of the harmonic amplitude of the harmonic interference signals included.

During the elimination of harmonic interference signals, if what the AFC module 380 in Fig. 3 was estimated Frequency deviation value directly adjusts phaselocked loop (Phase Locked Loop, referred to as " PLL ") in RF modules 310, Harmonic management module 330 is then arrived it is considered that no frequency deviation, directly calculates harmonic wave according to nominal frequency and remove Shifting amount.

As an example it is assumed that crystal oscillator fundamental frequency is F, the center frequency point for receiving signal is f_c, harmonic wave interference frequency Point is f_i, then f=f_i-f_cThe amount of moving of Harmonics elimination can be defined as.Wherein, center frequency point f_cWith Harmonic wave interference frequency f_iIt can be expressed as：

f_c=F × (N+1/M) (1)

f_i=F × N (2)

Y (t)=x (t)+Ae^j(2πf+θ)+n(t) (3)

It is to exist in the signal of harmonic management module 330 if the offset estimation value is compensated in base band Frequency deviation, this time-harmonic wave amount of moving needs conversion to fall frequency deviation value.Assuming that frequency deviation is Δ f, then signal is received Center frequency point f_cHarmonious wave interference frequency f_iRespectively：

f_c=(F+ Δs f) × (N+1/M) (4)

f_i=(F+ Δs f) × N (5)

The nominal harmonic wave amount of moving can be calculated for f=f according to formula (1) and (2)_i-f_c=F × (1/M), But when there is frequency deviation Δ f, the interval is actual for f'=(F+ Δs f) × (1/M), and the frequency deviation of AFC estimations It is worth for f_AFC=Δ f (N+1/M), frequency deviation scale factor is Fratio=Δs f/F.It therefore, it can using known Information, which is calculated, to be actually needed the harmonic wave amount of moving used and is：

The method of f' in the above-mentioned determination harmonic wave amount of moving, i.e. formula (6), it is adaptable to demodulation modes With alien frequencies pattern.According to description above, for grade mode, using frequency deviation stepping algorithm, press respectively Be tri- frequencies of f, f- Δ f' and f+ Δ f' estimation harmonic waves according to the harmonic wave amount of moving, here using Δ f'=10KHz as Example is illustrated, and interference estimate power most strong frequency is then selected from three frequencies, as rear The harmonic wave amount of moving that Harmonics elimination process is utilized is carried out in the data that continued access is received.

It is described above how determining to determine the harmonic wave amount of moving under demodulation modes and alien frequencies pattern.Tie below Close the determination that Fig. 6 describes the harmonic wave amount of moving under grade mode.Because grade mode is used for initial cell search There is no convergent scene with the AFC such as frequency sweep, can not now know the accurate frequency deviation value of receiver, this In for example with 1ms data, to estimate the gear of frequency deviation.Fig. 6 is the grade mode of the embodiment of the present invention Gear estimation schematic block diagram.

For example, as shown in Figure 6, it is assumed that sampling rate is 30.72Msps, unit is switching rate (Million Samples per Second, referred to as " Msps ").1ms includes 30720 sampling points, if Unit length L=128 is put, then (30720-4096)/128=208 can be carried out altogether by data being received in Fig. 6 Section is calculated.For every one piece of data, harmonic management module 330 is utilized respectively [f-10KHz, f, f+10KHz] These three amounts of moving calculate the harmonic amplitude harmonic phase of harmonic wave interference estimate, i.e. harmonic interference signals Position, it is possible to obtain these three amounts of moving and distinguish corresponding harmonic interference signals.It is humorous according to three obtained Interference wave signal, harmonic management module 330 utilizes formula P=I²+Q²Calculate three harmonic interference signals point Not corresponding power, wherein I represents the imaginary part of plural harmonic signal, and Q represents the reality of plural harmonic signal Portion.Alpha (Alpha) filtering is carried out afterwards, compares maximum therein, and by the maximum The corresponding harmonic wave amount of moving is defined as the target harmonic wave amount of moving.The harmonic wave amount of moving will be targeted simultaneously The corresponding counter of the harmonic wave amount of moving plus 1, tri- frequencies of f-10KHz, f and f+10KHz are corresponding Counter can be represented with Cnt0, Cnt1 and Cnt2 respectively.

Current power (Power, referred to as " P ") for receiving data, its history value is set to Plod, Here it is Alpha=0.2 to make Alpha filter factors, then filtered value is：

Pcurrent=(1-Alpha) * Plod+Alpha*P；// calculating for the first time directly makes Pcurrent=P；

Plod=Pcurrent；

Wherein, the parameter such as data length, unit length L and Alpha filter factor for estimating gear Configuration is example, can be configured when product is realized according to actual conditions, and the present invention is not limited this.

Defining the corresponding filtered performance number of [f-10KHz, f, f-10KHz] this third gear is respectively [Pcurrent0, Pcurrent1, Pcurrent2], then every section of maximum for selecting in three, and its is right The counter answered plus 1.After 208 sections of statistics, select in Cnt0, Cnt1 and Cnt2 most Big value, and using its corresponding harmonic wave amount of moving as the gear estimated, the harmonic wave for follow-up sampling point disappears Remove.

After gear where determining the harmonic wave amount of moving, after being carried out according still further to the mode for fixing the harmonic wave amount of moving Harmonic wave estimation and eliminate that continued access is received.

Alternatively, as another embodiment, before the elimination of the carry out harmonic interference signals, this method Also include：

Illustrate by taking grade mode as an example, it is determined that before the harmonic wave amount of moving, harmonic management module 330 is first The length Ndc of direct current (Direct Current, referred to as " DC ") data is first determined, and is believed according to direct current Number unit length in each sampled point signal value, calculate direct current signal average value, finally from The average value that the direct current signal is subtracted in signal is received, is disappeared with to receive the DC component in signal Remove.For example shown in Fig. 6, harmonic management module 330 is calculated DC minutes using above Ndc=4096 point Amount, follow-up sampling point first subtracts the DC values and carries out computing again.

Wherein, the data length Ndc for calculating direct current signal is example, can be according to reality when product is realized Border situation is configured, and the present invention is not limited this.

Therefore, by using input parameter DC method of estimation, i.e., using above when module starts The average value of Ndc points DC signals according to statistics, the support DC that first disappears carries out harmonic wave estimation and elimination again, During so as to avoid harmonic wave frequency and close center frequency point, the shadow that DC components are produced to harmonic wave estimated accuracy Ring.

After the harmonic wave amount of moving is determined in 410, method that can be according to 420 utilizes the harmonic wave The amount of moving is estimated the harmonious wave phase of harmonic amplitude of harmonic signal.

Fig. 7 is the amplitude and the schematic flow of phase of the determination harmonic interference signals of the embodiment of the present invention Figure.Alternatively, as another embodiment, as shown in fig. 7, described according to the reception in 420 Signal and the harmonic wave amount of moving, determine the harmonic wave width for the harmonic interference signals that the reception signal includes The harmonious wave phase of degree, including：

421, according to the harmonic wave amount of moving, the harmonic wave interference frequency is moved into the reception signal Center frequency point position.

422, according to the signal value of each sampled point of the reception signal in unit length, calculate The average value for receiving signal；

423, according to the average value of the reception signal, determine that the reception signal includes described humorous The harmonic amplitude and the harmonic phase of interference wave signal.

Specifically describe how harmonic management module 330 estimates the humorous of the harmonic interference signals with reference to Fig. 8 Wave amplitude harmony wave phase.

Harmonic management module 330 first moves harmonic wave interference frequency the position for the center frequency point for receiving signal Put, it is specific as shown in Figure 8.Fig. 8 is the schematic of the method for the harmonic carcellation interference of the embodiment of the present invention Block diagram.Wherein, harmonic wave interference amplitude is completed in the dotted box portion of harmonic management module 330 in fig. 8 With the determination of phase.

As shown in figure 8, sampling speed of the tone signal generation module according to the amount of moving f and baseband receiving signals Rate F_s, the plural tone signal of generation：Wherein N=0,1,2 ..., complex represent to take plural number to signal.Sampling point indexes n with receiving the sampling point of signal one by one Correspondence.Negative sign is taken to imaginary part afterwards, e is obtained^-j2πft, by by receive signal the n-th segment signal y (t) with e^-j2πftCM is carried out, harmonic wave interference frequency is moved center frequency point position by realization.After being moved Receive signal y'(t).

Y'(t)=y (t) × e^-j2πft=[x (t)+n (t)] × e^-j2πft+Ae^jθ (7)

Harmonic management module 330 according to formula (8), can estimate that the harmonic amplitude of harmonic interference signals is harmonious Wave phase.

It should be understood that in above-mentioned hypothesis, can not be accurate if reception signal is larger relative to harmonic power Estimate parameter, that is, receive signal and be higher than received signal strength indicator device (Received Signal Strength Indicator, referred to as " RSSI ") indicate signal intensity when, the time harmonic elimination algorithm may it is invalid, Cause penalty.Therefore the method described in the embodiment of the present invention is used for harmonic power and is more than reception signal work( In the case of rate.

Y'(t)=y (t) × e^-j2πft=[x (t)+n (t)] × e^-j2πft+Ae^j2πΔfte^jθ (9)

In 430, harmonic management module 330 determines that harmonic wave is done according to the harmonious wave phase of the harmonic amplitude Disturb signal.

Specifically, harmonic wave interference module 330 can be reconstructed after the amplitude and phase of harmonic wave is determined Ae^j2πΔfte^jθAnd this is subtracted from signal is received, to realize to the next section of harmonic wave interference received in signal The elimination of signal.

In 440, harmonic management module 330 subtracts harmonic interference signals from the reception signal, with So that the harmonic interference signals received in signal are eliminated.The harmonic wave shown in Fig. 8 updates estimation point Refer to that harmonic management module 330 updates for the harmonious wave phase of harmonic amplitude of harmonic interference signals per L points Once, you can to carry out the estimation of harmonic interference signals at each section, so as to keep to harmonic interference signals Real-time update, with improve harmonic wave interference elimination accuracy.

Therefore, the method for the harmonic carcellation interference described in the embodiment of the present invention, the harmonic wave letter efficiently solved Number docking is collected mail number interference brought, and is improved the sensitivity behaviour of receiver, is made the property of receiver It can not be influenceed by harmonic signal intensity, with higher robustness.

Further, since employing the mode of stream treatment, product realization is simplified, and need not be extra Convergence time, therefore with higher practicality.

It should be understood that the size of the sequence number of above-mentioned each process is not meant to the priority of execution sequence, each process Execution sequence should be determined with its function and internal logic, the implementation process without tackling the embodiment of the present invention Constitute any limit.

Above in conjunction with Fig. 1 to Fig. 8, harmonic carcellation interference according to embodiments of the present invention is described in detail Method, below in conjunction with Fig. 9 and Figure 10, harmonic carcellation according to embodiments of the present invention is described in detail and does The device disturbed.

Fig. 9 is the schematic diagram of the device of the harmonic carcellation interference of the embodiment of the present invention.Shown in Fig. 9 Harmonic carcellation interference device 900 can be used in perform earlier figures 4 into Fig. 8 embodiment of the method Each process.The device 900 of harmonic carcellation interference can be above-mentioned harmonic wave interference module 330, can To perform each process of the execution of harmonic wave interference module 330.As shown in figure 9, harmonic carcellation interference Device includes determining module 901 and processing module 902.Wherein, the first determining module 901 is used for：

First determines the harmonic wave amount of moving, and the harmonic wave amount of moving is the harmonic wave interference frequency and the reception Difference between the center frequency point of signal；

Processing module 902, the institute for subtracting the determination of the first determining module 901 from the reception signal Harmonic interference signals are stated, to cause the harmonic interference signals in the reception signal to be eliminated.

As another embodiment, the first determining module 901 specifically for：

As another embodiment, described device also includes the second determining module 903, and mould is determined first Block 901 determines before the harmonic wave amount of moving that the second determining module 903 is used for：

As another embodiment, when the second determining module 903 determines that the Harmonics elimination pattern is demodulation Pattern or alien frequencies pattern, or the harmonic wave interference frequency be not present the frequency shift (FS) when, first determine Module 901 specifically for：

According to the center frequency point of the harmonic wave interference frequency and the reception signal, the harmonic wave amount of moving is determined.

As another embodiment, when the second determining module 903 determines that the Harmonics elimination pattern is stepping During pattern, the first determining module 901 specifically for：

As another embodiment, the first determining module 901 specifically for：

Alternatively, the first determining module 901 is additionally operable to：

Processing module is additionally operable to, and the average value of the direct current signal is subtracted from the reception signal, so that The direct current signal received in signal is obtained to be eliminated.

As shown in Figure 10, the embodiment of the present invention additionally provides a kind of device of harmonic carcellation interference, and this disappears Except the device of harmonic wave interference includes processor 1001, memory 1002, bus system 1003, receiver 1004 and transmitter 1005.Wherein, processor 1001, memory 1002 and receiver 1004 pass through Bus system 1003 is connected, and memory 1002 is used for store instruction, and processor 1001 is deposited for execution The instruction that reservoir 1002 is stored, and control the receive information of receiver 1004.Wherein processor 1001, deposit Reservoir 1002, bus system 1003, receiver 1004 and transmitter 1005 can pass through one or many Individual chip is realized.For example, processor 1001, memory 1002, bus system 1003, receiver 1004 It is can be fully integrated with transmitter 1005 in a chip, or processor 1001, bus system 1003rd, receiver 1004 and transmitter 1005 can be integrated in a chip and memory 1002 collects Into in another chip, concrete form is not limited herein.Wherein, processor 1001 is used for：

It should be noted that the memory in the embodiment of the present invention can be volatile memory or non-volatile memories Device, or may include both volatibility and nonvolatile memory.Wherein, nonvolatile memory can be Read-only storage (Read-Only Memory, referred to as " ROM "), programmable read only memory (Programmable ROM, referred to as " PROM "), Erasable Programmable Read Only Memory EPROM (Erasable PROM, referred to as " EPROM "), Electrically Erasable Read Only Memory (Electrically EPROM, Referred to as " EEPROM ") or flash memory.Volatile memory can be random access memory (Random Access Memory, referred to as " RAM "), it is used as External Cache.By exemplary but be not Restricted explanation, the RAM of many forms can use, for example static RAM (Static RAM, Referred to as " SRAM "), dynamic random access memory (Dynamic RAM, referred to as " DRAM "), Synchronous Dynamic Random Access Memory (Synchronous DRAM, referred to as " SDRAM "), double number According to rate synchronization dynamic random access memory (Double Data Rate SDRAM, referred to as " DDR SDRAM "), enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, referred to as " ESDRAM "), synchronized links dynamic random access memory (Synch Link DRAM, referred to as " SLDRAM ") and direct rambus random access memory (Direct Rambus RAM, referred to as “DR RAM”).The memory of system and method described herein be intended to including but not limited to these and appoint The memory for other suitable types of anticipating.

Those of ordinary skill in the art are it is to be appreciated that with reference to each of the embodiments described herein description The unit and algorithm steps of example, can be with electronic hardware or the knot of computer software and electronic hardware Close to realize.These functions are performed with hardware or software mode actually, depending on the spy of technical scheme Fixed application and design constraint.Professional and technical personnel can use not Tongfang to each specific application Method realizes described function, but this realization is it is not considered that beyond the scope of this invention.

In several embodiments provided herein, it should be understood that disclosed system, device and Method, can be realized by another way.For example, device embodiment described above is only to show Meaning property, for example, the division of the unit, only a kind of division of logic function can when actually realizing To there is other dividing mode, such as multiple units or component can combine or be desirably integrated into another System, or some features can be ignored, or not perform.It is another, it is shown or discussed each other Coupling or direct-coupling or communication connection can be the INDIRECT COUPLING of device or unit by some interfaces Or communication connection, can be electrical, machinery or other forms.

The unit illustrated as separating component can be or may not be it is physically separate, make It can be for the part that unit is shown or may not be physical location, you can with positioned at a place, Or can also be distributed on multiple NEs.Can select according to the actual needs part therein or Person's whole units realize the purpose of this embodiment scheme.

In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit In or unit be individually physically present, can also two or more units be integrated in one In individual unit.

If the function is realized using in the form of SFU software functional unit and as independent production marketing or made Used time, it can be stored in a computer read/write memory medium.Understood based on such, the present invention The part that is substantially contributed in other words to prior art of technical scheme or the technical scheme portion Dividing can be embodied in the form of software product, and the computer software product is stored in a storage medium In, including some instructions to cause a computer equipment (can be personal computer, server, Or the network equipment etc.) perform all or part of step of each embodiment methods described of the invention.And it is preceding The storage medium stated includes：USB flash disk, mobile hard disk, read-only storage (Read-Only Memory, ROM), Random access memory (Random Access Memory, RAM), magnetic disc or CD etc. are various can With the medium of store program codes.

The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited to In this, any one skilled in the art the invention discloses technical scope in, can be easily Expect various equivalent modifications or substitutions, these modifications or substitutions should all cover in protection scope of the present invention Within.Therefore, protection scope of the present invention should be defined by scope of the claims.

Claims

1. a kind of method of harmonic carcellation interference, it is characterised in that harmonic wave interference frequency, which is located to receive, to be believed Number reception bandwidth in, methods described includes：

2. the method as described in claim 1, it is characterised in that it is described according to the reception signal and The harmonic wave amount of moving, determines that the harmonic amplitude for the harmonic interference signals that the reception signal includes is harmonious Wave phase, including：

3. method as claimed in claim 2, it is characterised in that the determination harmonic wave amount of moving it Before, methods described also includes：

According to the size of the frequency shift (FS) of the reception signal, Harmonics elimination pattern is determined, the harmonic wave disappears Except pattern includes grade mode, demodulation modes or alien frequencies pattern；

4. method as claimed in claim 3, it is characterised in that when it is determined that the Harmonics elimination pattern When the frequency shift (FS) is not present for demodulation modes or alien frequencies pattern, or the harmonic wave interference frequency, institute The determination harmonic wave amount of moving is stated, including：

5. method as claimed in claim 3, it is characterised in that when it is determined that the Harmonics elimination pattern During for grade mode, the determination harmonic wave amount of moving, including：

6. method as claimed in claim 5, it is characterised in that it is described from the first harmonic amount of moving, In the second harmonic amount of moving and the third harmonic amount of moving, the harmonic wave amount of moving is selected, including：

7. the method as any one of claim 1 to 6, it is characterised in that methods described is also Including：

8. a kind of device of harmonic carcellation interference, it is characterised in that harmonic wave interference frequency, which is located to receive, to be believed Number reception bandwidth in, described device includes：

First determining module is additionally operable to：

9. device as claimed in claim 8, it is characterised in that first determining module is specifically used In：

10. device as claimed in claim 9, it is characterised in that described device also includes second and determined Module, before first determining module determines the harmonic wave amount of moving, second determining module is used In：

11. device as claimed in claim 10, it is characterised in that when second determining module is true The Harmonics elimination pattern is determined for demodulation modes or alien frequencies pattern, or the harmonic wave interference frequency is not present During the frequency shift (FS), first determining module specifically for：

12. device as claimed in claim 10, it is characterised in that when second determining module is true When the fixed Harmonics elimination pattern is grade mode, first determining module specifically for：

13. device as claimed in claim 12, it is characterised in that first determining module is specific For：

14. the device as any one of claim 8 to 13, it is characterised in that described first Determining module is additionally operable to：

The processing module is additionally operable to, and the average value of the direct current signal is subtracted from the reception signal, To cause the direct current signal in the reception signal to be eliminated.