CN108737308A - Peak factor reduces method and apparatus - Google Patents
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Abstract
This application discloses a kind of peak factors to reduce method and apparatus, and wherein method includes：To currently waiting for that slicing handles signal branch, first via signal and second road signal are obtained；To first via signal delay process, and according to preset detection window, second road signal is generated in the single-point complex value noise of each detection window, each single-point complex value noise is multiplied with preset clipping factor successively, obtains corresponding clipped noise；Wherein, the amount of delay that the delay process uses for from branch terminate to generate first clipped noise handling duration, tn‑tn‑1>=Len, 2≤n, tnFor the sampling point position of the corresponding second road signal of n-th of single-point complex value noise generated, tn‑1For the sampling point position of the corresponding second road signal of (n-1)th single-point complex value noise generated, Len is the length of clipping factor；Clipped noise and the first via signal after delay disposal are subtracted each other, the slicing handling result for waiting for slicing processing signal is obtained.CFR functions may be implemented using the present invention, and at low cost.
Description
Technical field
The present invention relates to mobile communication technologies, and (CFR) method and apparatus are reduced more particularly to a kind of peak factor.
Background technology
In order to reduce the peak-to-average force ratio of signal, many peak factors have been proposed at present reduces method, wherein amplitude limit class
CFR methods are relatively simple method, and principle is：Before signal is sent to amplifier, Nonlinear Processing is first passed through, to having
The signal of larger peak power carries out predistortion, makes the operating point of power amplifier close proximity to the end in linear work area, with
Improve power amplification efficiency.
In 4G radio communication base stations, common amplitude limit class CFR methods have：Peak window crest factor reduces (PW-
CFR), noise shaped crest factor reduces (NS-CFR), impulses injection crest factor reduces (PI-CFR), peak value offset wave crest because
Son reduces (PC-CFR) etc..The above method is intended to be multiplied generating with clipping factor with peak value during realization to offset arteries and veins
Punching, the peak value number for needing the number of the multiplier consumed and detecting are proportional.
There are many 4G radio communication base stations use site programmable gate arrays (FPGA) to do Digital IF Processing at this stage,
Multiplier is the resource of a kind of limited amount in FPGA.When using above-mentioned amplitude limit class CFR methods, realized if reducing CFR
The occupancy of FPGA multiplier resources in journey, the leakage that will result in high PAPR signals is cut, to make the reduced performance of CFR slicings,
The purpose of protection radio-frequency power amplifier is not achieved, and if to realize preferable CFR effects, it must just consume a large amount of multiplication
Device resource.Therefore, existing amplitude limit class CFR methods can cannot be widely applied to because multiplier expense is big in 4G systems.
Invention content
In view of this, the main purpose of the present invention is to provide a kind of peak factors to reduce method and apparatus, may be implemented
CFR functions, and multiplier expense is small.
In order to achieve the above object, technical solution proposed by the present invention is：
A kind of peak factor reduction method, including：
To currently waiting for that the signal of slicing processing carries out branch, first via signal and second road signal are obtained；
Delay process is carried out to the first via signal, meanwhile, according to preset detection window, generate the second road letter
Number each detection window single-point complex value noise, and successively will each single-point complex value noise and preset clipping factor phase
Multiply, obtains corresponding clipped noise；Wherein, the amount of delay that the delay process uses for from the branch terminate to generate first
The handling duration of a clipped noise, tn-tn-1>=Len, 2≤n, the tnFor n-th of the single-point complex value noise pair generated
The sampling point position for the second road signal answered, the tn-1It is corresponding described for (n-1)th single-point complex value noise being generated
The sampling point position of second road signal, the Len are the length of the clipping factor；
The clipped noise and the first via signal after the delay disposal are subtracted each other, the letter for waiting for slicing processing is obtained
Number slicing handling result.
A kind of peak factor reduction device, including：
Shunt module, for currently waiting for that the signal of slicing processing carries out branch, obtaining first via signal and the second road letter
Number；
Clipped noise generation module, for carrying out delay process to the first via signal, meanwhile, according to preset detection
Window, generates the second road signal in the single-point complex value noise of each detection window, and successively will each single-point complex value
Noise is multiplied with preset clipping factor, obtains corresponding clipped noise；Wherein, the amount of delay that the delay process uses for from
The branch terminates to the handling duration for generating first clipped noise, tn-tn-1>=Len, 2≤n, the tnTo be generated
The corresponding second road signal of n-th of single-point complex value noise sampling point position, the tn-1For (n-1)th generated
The sampling point position of the corresponding second road signal of single-point complex value noise, the Len are the length of the clipping factor；
Slicing processing module is obtained for subtracting each other the clipped noise and the first via signal after the delay disposal
The slicing handling result of the signal for waiting for slicing processing.
In conclusion peak factor proposed by the present invention reduces method and apparatus, by ensuring tn-tn-1>=Len, i.e. phase
The sampled point quantity being spaced between adjacent single-point complex value noise is more than or equal to the length of clipping factor so that every time only by a complex value
Noise is multiplied to obtain clipped noise with clipping factor, only needs a multiplier when in this way, generating clipped noise every time, therefore,
It may insure to only use a FPGA multiplier resources when CFR processing, so as to which while realizing CFR functions, reduction multiplies
Musical instruments used in a Buddhist or Taoist mass expense, and then reduce the cost of 4G radio communication base stations.
Description of the drawings
Fig. 1 is the method flow schematic diagram of the embodiment of the present invention；
Fig. 2 is the apparatus structure schematic diagram of the embodiment of the present invention.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, right below in conjunction with the accompanying drawings and the specific embodiments
The present invention is described in further detail.
Core of the invention thought is：It is cut so that the sampled point quantity being spaced between adjacent single-point complex value noise is more than or equal to
The length of wave system number is multiplied to obtain clipped noise with clipping factor, in this way, per secondary to ensure each by a complex value noise
At a multiplier is only needed when clipped noise, therefore, multiplier can be greatly lowered and open while realizing CFR functions
Pin, and then reduce the cost of 4G radio communication base stations.
Fig. 1 is the flow diagram of the embodiment of the present invention, as shown in Figure 1, the peak factor reduction side that the embodiment is realized
Method includes mainly：
Step 101, the signal progress branch to currently waiting for slicing processing, obtain first via signal and second road signal.
The signal that this step is used to treat slicing processing carries out branch, to utilize wherein signal all the way in subsequent step
Based on the signal acquisition clipped noise for waiting for slicing processing, clipped noise and another way signal subtraction are then recycled, to obtain
Wait for that the slicing handling result of slicing processing signal, the specific shunt procedure of this step are grasped by those skilled in the art, herein
It repeats no more.
In practical applications, wait for the determination of the signal of slicing processing compared with scheme, i.e. papr (PAPR)
High signal.
Step 102 carries out the first via signal delay process, meanwhile, according to preset detection window, described in generation
Second road signal and successively cuts each single-point complex value noise with preset in the single-point complex value noise of each detection window
Wave multiplication obtains corresponding clipped noise.
Wherein, the amount of delay that the delay process uses for from the branch terminate to generate first clipped noise
Handling duration, tn-tn-1>=Len, 2≤n, the tnFor corresponding second tunnel of n-th of single-point complex value noise generated
The sampling point position of signal, the tn-1For adopting for (n-1)th single-point corresponding second road signal of complex value noise being generated
Sampling point position, the Len are the length of the clipping factor.
In practical applications, sliding window method setting detection window may be used, but not limited to this, the specific length of detection window
L can be according to actual needs configured by those skilled in the art.
It should be noted that needing to meet t in this stepn-tn-1>=Len, to ensure to be multiplied to obtain with clipping factor every time
The quantity of the complex value noise of clipped noise is one, i.e., the single-point complex value noise of one detection window, so, it can be ensured that every time
A multiplier is only needed when generating clipped noise, so as to while realizing CFR functions, multiplier be greatly lowered and opens
Pin.
In this step, need to carry out delay process to first via signal, also, amount of delay is to terminate to life from the branch
At the handling duration of first clipped noise, to ensure the function and performance of slicing, wait cutting to described so as to realize
The slicing processing of the signal of wave processing.Random access memory (RAM) realization may be used in specific delay process, but does not limit to
In this.
In this step, it is also necessary to handle second road signal, list of the acquisition second road signal in each detection window
Point complex value noise, and based on this corresponding clipped noise of acquisition.
Preferably, in order to further ensure that CFR performances, second road signal can be utilized in each detection in practical applications
Peak-peak in window generates corresponding single-point complex value noise, and accomplished in many ways this purpose specifically may be used, below
It provides four kinds of concrete methods of realizing this is described in detail, in practical applications, however it is not limited to following examples.
Method one：
Step a1, range signal and phase letter are obtained into the extraction process of line amplitude and phase to the second road signal
Number.
In this step, the amplitude and phase information of existing method extraction signal may be used, such as may be used 6 grades
The cascade mode of Cordic algoritic modules of vectoring patterns is believed come the amplitude and phase for extracting another way cfr_in signals
Breath.Wherein, the input/output relation per level-one is as follows：
Ik+1=Ik-σk·2-k·Qk
Qk+1=Qk+σk·2-k·Ik
Phk+1=Phk-σktan-1(2-k)
Wherein k is iteration series 0~5,The initialization value that iteration starts is respectively I0=cfr_
In_i, Q0=cfr_in_q, Ph0=0, cfr_in_i, cfr_in_q are respectively the real and imaginary parts of second road signal cfr_in.
The I of afterbody Cordic_vect outputs5By the amplitude as second road signal cfr_in signals after Gain tuning, and
Ph5As the phase of second road signal cfr_in signals, tan-1(2-k) obtained by way of tabling look-up according to k values.
In practical applications, however it is not limited to which the amplitude of said extracted signal and the method for phase information, details are not described herein.
Step a2, thresholding decision device (clipper) was utilized, noise gate decision process is carried out to the range signal,
Obtain noise amplitude signal.
In this step, for carrying out clipper processing to the range signal extracted in step a1, amplitude is therefrom filtered out
More than preset CFR threshold values range signal and generate corresponding noise amplitude signal.Specific clipper processing rule is such as
Under：
Wherein, c (n) is the output signal of clipper, and x (n) is the input signal of clipper, and cfr_th is preset
CFR thresholdings.
Step a3, maximum nonzero value of the noise amplitude signal in each detection window is detected successively, and
Using the respective phase in the maximum nonzero value and the phase signal, the single-point complex value noise is generated.
In this step, in each detection window, the maximum nonzero value in the noise amplitude signal is only detected, and utilizing should
Maximum nonzero value generates single-point complex value noise, in this way, obtained single-point complex value noise is that corresponding detection window amplitude is maximum
Noise generates clipped noise using the single-point complex value noise and carries out slicing processing to original signal, CFR functions may be implemented.
Specifically, existing complex value noise generation method may be used, realize this step.Such as it can be answered according to actual
With scene and simulation result, complex value noise is generated using the cascade mode of Cordic algorithms of 6 grades of rotation patterns.Its
In, the input/output relation per level-one is as follows：
Ik+1=Ik-σk·2-k·Qk
Qk+1=Qk+σk·2-k·Ik
Phk+1=Phk-σk·tan-1(2-k)
Wherein, k is iteration series 0~5,The initialization value of the beginning of iteration is respectively I0=
Peak_mag, Q0=0, Ph0=peak_pha, the corresponding amplitude of peak point and phase that peak_mag, peak_pha are respectively.
The I of afterbody Cordic_rot outputs5、Q5By obtaining the real and imaginary parts of complex value noise, tan after Gain tuning-1(2-k) obtained by way of tabling look-up according to k values.
Method two：
Step b1, range signal and phase letter are obtained into the extraction process of line amplitude and phase to the second road signal
Number.
The specific implementation of this step is with step a1, and details are not described herein.
Step b2, thresholding decision device clipper was utilized, noise gate decision process is carried out to the range signal, is obtained
To noise amplitude signal.
The specific implementation of this step is repeated no more with step a2 with this.
Step b3, the noise amplitude signal is converted into the parallel noise amplitude signal in the preset roads M.
This step, in order to improve the formation speed of single-point complex value noise, using serioparallel exchange, by the noise amplitude signal
It is converted into the parallel signal in the roads M.
Step b4, in each detection window, by the way of the processing of the roads M signal parallel, detection is described transformed
Per maximum nonzero value of the road noise amplitude signal in this detection window, all maximum nonzero values in this detection window
In, select maximum value；Using the respective phase in the maximum value and the phase signal, the described of this detection window is generated
Single-point complex value noise.
In this step b4, in order to improve each detection window single-point complex value noise formation speed, in each inspection
Window is surveyed, to the processing of the roads M signal parallel, detects maximum nonzero value of every road noise amplitude signal in this detection window, into
And maximum value is selected from M maximum nonzero value, utilize the maximum value and the phase in the phase signal that is extracted in step b1
Phase multiplication is answered, the single-point complex value noise of this detection window is obtained.Here, due to being the signal parallel processing of the roads M, we
Detection window in method can be arranged it is smaller, relative to do not have in method 1 introduce serioparallel exchange detection window L, this method
In detection window length can be L/M.
Method three：
Step c1, serioparallel exchange is carried out to the second road signal, obtains the parallel signal in the roads M.
Step c2, by the way of the processing of the roads M signal parallel, for the roads serioparallel exchange Hou Mei signal, determining should
The amplitude and phase of single-point complex value noise of the road signal in each detection window.
Wherein, the determination includes：To serioparallel exchange Hou the i-th road signals at the extraction of line amplitude and phase
Reason, obtains range signal and phase signal；Thresholding decision device (clipper) was utilized, Noise gate is carried out to the range signal
Decision process is limited, noise amplitude signal is obtained；According to the detection window, detect the noise amplitude signal each successively
Maximum nonzero value in detection window is made an uproar the maximum nonzero value as single-point complex value of the i-th road signal in this detection window
The amplitude of sound, and by the maximum nonzero value in the phase signal corresponding phase, as the i-th road signal in this detection window
In single-point complex value noise phase.
Step c3, for each detection window, from the amplitude for all roads the M signal determined, selection
Go out amplitude peak, and utilize the amplitude peak and corresponding phase, generates the single-point complex value noise of this detection window.
Method four：
Step d1, range signal and phase letter are obtained into the extraction process of line amplitude and phase to the second road signal
Number.
The specific implementation of this step is with step a1, and details are not described herein.
Step d2, serioparallel exchange is carried out to the range signal, obtains the parallel range signal in the roads M.
Step d3, by the way of the processing of the roads M signal parallel, for the roads serioparallel exchange Hou Mei range signal, really
Maximum noise amplitude of the roads the Ding Gai range signal in each detection window；Wherein, the determination includes：Utilized thresholding
Decision device clipper carries out noise gate decision process to i-th roads serioparallel exchange Hou range signal, obtains noise width
Signal is spent, detects maximum nonzero value of the noise amplitude signal in each detection window successively, and by the maximum
Maximum noise amplitude of the nonzero value as the i-th road range signal in corresponding detection window.
Step d4, for each detection window, from the maximum noise amplitude for all roads the M signal determined
In, maximum value is selected, using the respective phase of the maximum value and the phase signal, generates the single-point of this detection window
Complex value noise.
Serioparallel exchange technology is introduced in the above method two, three and four, in this way, the parallel place of multiple signals may be implemented
Reason, it is detection window window is grown in method one 1/M that detection window, which also will significantly reduce, therefore, can be with compared to method one
Increase substantially the formation efficiency of single-point complex value noise.
Step 103 subtracts each other the clipped noise and the first via signal after the delay disposal, obtains described waiting for slicing
The slicing handling result of the signal of processing.
Fig. 2, which is peak factor corresponding with the above method, reduces apparatus structure schematic diagram, as shown in Fig. 2, the device packet
It includes：
Shunt module, for currently waiting for that the signal of slicing processing carries out branch, obtaining first via signal and the second road letter
Number；
Clipped noise generation module, for carrying out delay process to the first via signal, meanwhile, according to preset detection
Window, generates the second road signal in the single-point complex value noise of each detection window, and successively will each single-point complex value
Noise is multiplied with preset clipping factor, obtains corresponding clipped noise；Wherein, the amount of delay that the delay process uses for from
The branch terminates to the handling duration for generating first clipped noise, tn-tn-1>=Len, 2≤n, the tnTo be generated
The corresponding second road signal of n-th of single-point complex value noise sampling point position, the tn-1For (n-1)th generated
The sampling point position of the corresponding second road signal of single-point complex value noise, the Len are the length of the clipping factor；
Slicing processing module is obtained for subtracting each other the clipped noise and the first via signal after the delay disposal
The slicing handling result of the signal for waiting for slicing processing.
Preferably, the clipped noise generation module includes noise generating unit；
The noise generating unit, for, into the extraction process of line amplitude and phase, obtaining width to the second road signal
Spend signal and phase signal；Thresholding decision device clipper was utilized, noise gate decision process is carried out to the range signal,
Obtain noise amplitude signal；Maximum nonzero value of the noise amplitude signal in each detection window is detected successively,
And using the respective phase in the maximum nonzero value and the phase signal, generate the single-point complex value noise.
Preferably, the clipped noise generation module includes noise generating unit；
The noise generating unit, for, into the extraction process of line amplitude and phase, obtaining width to the second road signal
Spend signal and phase signal；Thresholding decision device clipper was utilized, noise gate decision process is carried out to the range signal,
Obtain noise amplitude signal；The noise amplitude signal is converted into the parallel noise amplitude signal in the preset roads M；In each institute
Detection window is stated, by the way of the processing of the roads M signal parallel, detection transformed every road noise amplitude signal is in this detection
Maximum nonzero value in window in all maximum nonzero values in this detection window, selects maximum value；Using described
Respective phase in maximum value and the phase signal generates the single-point complex value noise of this detection window.
Preferably, the clipped noise generation module includes noise generating unit；
The noise generating unit obtains the parallel signal in the roads M for carrying out serioparallel exchange to the second road signal；
By the way of the processing of the roads M signal parallel, for the roads serioparallel exchange Hou Mei signal, determine the road signal each described
The amplitude and phase of single-point complex value noise in detection window；Wherein, the determination includes：To i-th after the serioparallel exchange
Road signal obtains range signal and phase signal into the extraction process of line amplitude and phase；Utilized thresholding decision device
Clipper carries out noise gate decision process to the range signal, obtains noise amplitude signal；According to the detection window,
Maximum nonzero value of the noise amplitude signal in each detection window is detected successively, using the maximum nonzero value as i-th
The amplitude of single-point complex value noise of the road signal in this detection window, and the maximum nonzero value is corresponding in the phase signal
Phase, the phase as single-point complex value noise of the i-th road signal in this detection window；For each detection window,
From the amplitude for all roads the M signal determined, amplitude peak is selected, and utilize the amplitude peak and corresponding phase
Position, generates the single-point complex value noise of this detection window.
Preferably, the clipped noise generation module includes noise generating unit；
The noise generating unit, for, into the extraction process of line amplitude and phase, obtaining width to the second road signal
Spend signal and phase signal；Serioparallel exchange is carried out to the range signal, obtains the parallel range signal in the roads M；Using the roads M signal
The mode of parallel processing determines the road range signal each preset the roads serioparallel exchange Hou Mei range signal
Maximum noise amplitude in detection window；Wherein, the determination includes：Thresholding decision device clipper was utilized, simultaneously to the string
Transformed i-th road range signal carries out noise gate decision process, obtains noise amplitude signal, detects the noise successively
Maximum nonzero value of the range signal in each detection window, and exist the maximum nonzero value as the i-th road range signal
Maximum noise amplitude in corresponding detection window；For each detection window, from the institute for all roads the M signal determined
It states in maximum noise amplitude, selects maximum value, using the respective phase of the maximum value and the phase signal, generate this detection
The single-point complex value noise of window.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention's
Within protection domain.
Claims (10)
1. a kind of peak factor reduces method, which is characterized in that including：
To currently waiting for that the signal of slicing processing carries out branch, first via signal and second road signal are obtained；
Delay process is carried out to the first via signal, meanwhile, according to preset detection window, generates the second road signal and exist
The single-point complex value noise of each detection window, and each single-point complex value noise is multiplied with preset clipping factor successively,
Obtain corresponding clipped noise；Wherein, the amount of delay that the delay process uses for from the branch terminate to generate first
The handling duration of the clipped noise, tn-tn-1>=Len, 2≤n, the tnN-th of single-point complex value noise to be generated corresponds to
The second road signal sampling point position, the tn-1For the (n-1)th single-point complex value noise corresponding described generated
The sampling point position of two road signals, the Len are the length of the clipping factor；
The clipped noise and the first via signal after the delay disposal are subtracted each other, the signal for waiting for slicing processing is obtained
Slicing handling result.
2. according to the method described in claim 1, it is characterized in that, described generate the second road signal in each detection window
Single-point complex value noise include：
To the second road signal into the extraction process of line amplitude and phase, range signal and phase signal are obtained；
Thresholding decision device clipper was utilized, noise gate decision process is carried out to the range signal, obtains noise amplitude letter
Number；
Maximum nonzero value of the noise amplitude signal in each detection window is detected successively, and utilizes the maximum
Respective phase in nonzero value and the phase signal generates the single-point complex value noise.
3. according to the method described in claim 1, it is characterized in that, described generate the second road signal in each detection window
Single-point complex value noise include：
To the second road signal into the extraction process of line amplitude and phase, range signal and phase signal are obtained；
Thresholding decision device clipper was utilized, noise gate decision process is carried out to the range signal, obtains noise amplitude letter
Number；
The noise amplitude signal is converted into the parallel noise amplitude signal in the preset roads M；
In each detection window, by the way of the processing of the roads M signal parallel, detection is described transformed per road noise amplitude
Maximum nonzero value of the signal in this detection window in all maximum nonzero values in this detection window, is selected most
Big value；Using the respective phase in the maximum value and the phase signal, the single-point complex value for generating this detection window is made an uproar
Sound.
4. according to the method described in claim 1, it is characterized in that, described generate the second road signal in each detection window
Single-point complex value noise include：
Serioparallel exchange is carried out to the second road signal, obtains the parallel signal in the roads M；
By the way of the processing of the roads M signal parallel, for the roads serioparallel exchange Hou Mei signal, determine the road signal each
The amplitude and phase of single-point complex value noise in the detection window；Wherein, the determination includes：After the serioparallel exchange
I-th road signal obtains range signal and phase signal into the extraction process of line amplitude and phase；Utilized thresholding decision device
Clipper carries out noise gate decision process to the range signal, obtains noise amplitude signal；According to the detection window,
Maximum nonzero value of the noise amplitude signal in each detection window is detected successively, using the maximum nonzero value as i-th
The amplitude of single-point complex value noise of the road signal in this detection window, and the maximum nonzero value is corresponding in the phase signal
Phase, the phase as single-point complex value noise of the i-th road signal in this detection window；
Amplitude peak is selected from the amplitude for all roads the M signal determined for each detection window,
And the amplitude peak and corresponding phase are utilized, generate the single-point complex value noise of this detection window.
5. according to the method described in claim 1, it is characterized in that, described generate the second road signal in each detection window
Single-point complex value noise include：
To the second road signal into the extraction process of line amplitude and phase, range signal and phase signal are obtained；
Serioparallel exchange is carried out to the range signal, obtains the parallel range signal in the roads M；
By the way of the processing of the roads M signal parallel, for the roads serioparallel exchange Hou Mei range signal, the road amplitude letter is determined
Maximum noise amplitude number in each detection window；Wherein, the determination includes：Utilized thresholding decision device
Clipper carries out noise gate decision process to i-th roads serioparallel exchange Hou range signal, obtains noise amplitude signal,
Maximum nonzero value of the noise amplitude signal in each detection window is detected successively, and the maximum nonzero value is made
For maximum noise amplitude of the i-th road range signal in corresponding detection window；
Each detection window is selected most from the maximum noise amplitude for all roads the M signal determined
Big value, using the respective phase of the maximum value and the phase signal, generates the single-point complex value noise of this detection window.
6. a kind of peak factor reduces device, which is characterized in that including：
Shunt module, for currently waiting for that the signal of slicing processing carries out branch, obtaining first via signal and second road signal；
Clipped noise generation module, for carrying out delay process to the first via signal, meanwhile, according to preset detection window
Mouthful, the second road signal is generated in the single-point complex value noise of each detection window, and each single-point complex value is made an uproar successively
Sound is multiplied with preset clipping factor, obtains corresponding clipped noise；Wherein, the amount of delay that the delay process uses is from institute
Branch is stated to terminate to the handling duration for generating first clipped noise, tn-tn-1>=Len, 2≤n, the tnIt is generated
The sampling point position of the corresponding second road signal of n-th of single-point complex value noise, the tn-1For (n-1)th list generated
The sampling point position of the corresponding second road signal of point complex value noise, the Len are the length of the clipping factor；
Slicing processing module obtains described for subtracting each other the clipped noise and the first via signal after the delay disposal
Wait for the slicing handling result of the signal of slicing processing.
7. device according to claim 6, which is characterized in that the clipped noise generation module includes that noise generates list
Member；
The noise generating unit, for, into the extraction process of line amplitude and phase, obtaining amplitude letter to the second road signal
Number and phase signal；Thresholding decision device clipper was utilized, noise gate decision process is carried out to the range signal, is obtained
Noise amplitude signal；Maximum nonzero value of the noise amplitude signal in each detection window, and profit are detected successively
With the respective phase in the maximum nonzero value and the phase signal, the single-point complex value noise is generated.
8. device according to claim 6, which is characterized in that the clipped noise generation module includes that noise generates list
Member；
The noise generating unit, for, into the extraction process of line amplitude and phase, obtaining amplitude letter to the second road signal
Number and phase signal；Thresholding decision device clipper was utilized, noise gate decision process is carried out to the range signal, is obtained
Noise amplitude signal；The noise amplitude signal is converted into the parallel noise amplitude signal in the preset roads M；In each inspection
Window is surveyed, by the way of the processing of the roads M signal parallel, detection transformed every road noise amplitude signal is in this detection window
In maximum nonzero value, in all maximum nonzero values in this detection window, select maximum value；Utilize the maximum
Respective phase in value and the phase signal, generates the single-point complex value noise of this detection window.
9. device according to claim 6, which is characterized in that the clipped noise generation module includes that noise generates list
Member；
The noise generating unit obtains the parallel signal in the roads M for carrying out serioparallel exchange to the second road signal；Using M
The mode of road signal parallel processing determines the road signal in each detection the roads serioparallel exchange Hou Mei signal
The amplitude and phase of single-point complex value noise in window；Wherein, the determination includes：I-th roads serioparallel exchange Hou are believed
Number into line amplitude and phase extraction process, obtain range signal and phase signal；Thresholding decision device clipper was utilized, it is right
The range signal carries out noise gate decision process, obtains noise amplitude signal；According to the detection window, detect successively
Maximum nonzero value of the noise amplitude signal in each detection window, using the maximum nonzero value as the i-th road signal at this
The amplitude of single-point complex value noise in detection window, and by the maximum nonzero value in the phase signal corresponding phase, make
The phase for the single-point complex value noise for being the i-th road signal in this detection window；For each detection window, from being determined
All roads M signal the amplitude in, select amplitude peak, and utilize the amplitude peak and corresponding phase, generate this
The single-point complex value noise of detection window.
10. device according to claim 6, which is characterized in that the clipped noise generation module includes that noise generates list
Member；
The noise generating unit, for, into the extraction process of line amplitude and phase, obtaining amplitude letter to the second road signal
Number and phase signal；Serioparallel exchange is carried out to the range signal, obtains the parallel range signal in the roads M；Using the roads M signal parallel
The mode of processing determines the road range signal in each preset detection the roads serioparallel exchange Hou Mei range signal
Maximum noise amplitude in window；Wherein, the determination includes：Thresholding decision device clipper was utilized, to the serioparallel exchange
The i-th roads Hou range signal carries out noise gate decision process, obtains noise amplitude signal, detects the noise amplitude successively
Maximum nonzero value of the signal in each detection window, and using the maximum nonzero value as the i-th road range signal corresponding
Maximum noise amplitude in detection window；For each detection window, from described in all roads the M signal determined most
In big noise amplitude, maximum value is selected, using the respective phase of the maximum value and the phase signal, generates this detection window
The single-point complex value noise.
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