CN102480458A - Peak clipping method and system by using parallel structure for broadband signal - Google Patents
Peak clipping method and system by using parallel structure for broadband signal Download PDFInfo
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Abstract
The invention discloses a peak clipping method and a peak clipping system by using a parallel structure for a broadband signal in order to solve the problem of peak value regeneration during reduction of a peak average power ratio. The system comprises an upper digital frequency change module, a peak rough selection module, a lower digital frequency change module, a peak value delicate selection module and a peak value counteracting module, wherein the upper digital frequency change module is used for performing interpolation and filtration on the broadband signal according to a roughly selected target rate to acquire interpolation broadband signals, the peak rough selection module is used for acquiring a roughly selected peak value which is greater than a preset power threshold value from the interpolation broadband signals, the lower digital frequency change module is used for performing down sampling processing on the roughly selected peak value according to a delicately selected target rate to acquire down sampling signals, the peak value delicate selection module is used for screening the down sampling signals, adaptively retaining a typical peak value and approximating the roughly selected peak value by using the typical peak value to acquire a peak value pulse signal, and the peak value counteracting module is used for performing peak value counteraction peak clipping processing on the broadband signal after a certain time delay according to the peak value pulse signal to acquire a peak clipping signal. By the method and the system, the peak clipping processing is performed by adopting the parallel structure, so that the peak value regeneration problem is better solved to a certain extent.
Description
Technical field
The present invention relates to the treatment technology of broadband signal, relate in particular to a kind of parallel organization despicking method and system of broadband signal.
Background technology
With the high speed development of the widebandization of mobile radio system, high speed, multi-serviceization, the power consumption of system is increasingly high, and the resolution system power consumption is that wireless mobile communications system continues one of fast-developing problem to be solved with improving power amplification efficiency.
Reduce the peak value of input work discharge signal and the ratio of average (abbreviation peak-to-average force ratio, the i.e. ratio of the peak power of signal and signal average power; Hereinafter all will be called for short peak-to-average force ratio as specifying), can improve the efficient of power amplifier to a certain extent significantly.In theory, reduce the processing of peak-to-average force ratio more under the processing speed near digital to analog converter (DAC), will reach good more peak clipping effect, reduce the probability of peak value regeneration simultaneously, but also will take increasing resource thereupon.After under low rate, reducing the processing procedure of peak-to-average force ratio; Carry out interpolation again or close the road processing; Can reduce the consumption of handling resource to a certain extent, but the effect of reduction peak-to-average force ratio not very good, pass through follow-up interpolation or close the road processing further to produce peak value.
The prior art of relevant reduction peak-to-average force ratio aspect does not mostly solve peak value regeneration problem well, therefore is necessary prior art is improved.
Summary of the invention
Technical problem to be solved by this invention is the parallel organization peak clipping technology that a kind of broadband signal need be provided, to solve the problem that peak-to-average force ratio reduces peak value regeneration in the processing procedure.
In order to solve the problems of the technologies described above, the invention provides a kind of peak clipping system of broadband signal, comprising:
The Digital Up Convert module is used for according to the preset targeted rate of roughly selecting said broadband signal being carried out the filtering interpolation processing, obtains the interpolation broadband signal;
Peak value is roughly selected module, is used for obtaining the peak value of roughly selecting that said interpolation broadband signal is higher than preset power threshold;
Digital Down Converter Module is used for according to preset selected targeted rate sampling processing being fallen in the said peak value of roughly selecting, and obtains falling sampled signal;
The selected module of peak value is used for the said sampled signal of falling is screened, and self adaptation keeps typical peak value, utilizes said typical peak value to approach the said peak value of roughly selecting, and obtains the peak pulse signal;
The peak value offset module is used for handling carry out the peak value offset peak clipping through the said broadband signal behind the fixed response time according to said peak pulse signal, obtains the peak clipping signal.
Preferably, this system further comprises:
The shift frequency module is used for two-way or the said interpolation broadband signal shift frequency more than the two-way are adjusted to predetermined separately center frequency point, obtains said interpolation broadband signal;
The frequency-division filter module be used for said interpolation broadband signal of roughly selecting beyond the peak value is suppressed to handle, and shift frequency obtains the baseband signal of zero-frequency to zero-frequency;
Wherein, said Digital Down Converter Module is used for according to said selected targeted rate said baseband signal being carried out the said sampling processing of falling, and obtains the said sampled signal of falling.
Preferably, said shift frequency module is further used for adjusted two-way of said shift frequency or the said interpolation broadband signal more than the two-way are closed the road processing, obtains one tunnel said interpolation broadband signal.
Preferably, said peak value is roughly selected module and is used for obtaining said power threshold through the power average and the predefined threshold margin of said broadband signal.
Preferably, the selected module of said peak value is used for approaching the said peak value of roughly selecting through said typical peak value is smoothly reached Filtering Processing, obtains said peak pulse signal.
In order to solve the problems of the technologies described above, the present invention also provides a kind of despicking method of broadband signal, comprises the steps:
The targeted rate of roughly selecting according to preset is carried out the filtering interpolation processing to said broadband signal, obtains the interpolation broadband signal;
Obtain to be higher than in the said interpolation broadband signal peak value of roughly selecting of preset power threshold;
Selected targeted rate according to preset is fallen sampling processing to the said peak value of roughly selecting, and obtains falling sampled signal;
The said sampled signal of falling is screened, and self adaptation keeps typical peak value, utilizes said typical peak value to approach the said peak value of roughly selecting, and obtains the peak pulse signal;
Handle carry out the peak value offset peak clipping through the said broadband signal behind the fixed response time according to said peak pulse signal, obtain the peak clipping signal.
Preferably, this method further comprises:
Two-way or the said interpolation broadband signal shift frequency more than the two-way are adjusted on the predetermined separately center frequency point, obtained said interpolation broadband signal;
Said interpolation broadband signal of roughly selecting beyond the peak value is suppressed to handle, and shift frequency obtains the baseband signal of zero-frequency to zero-frequency;
Wherein, said baseband signal is carried out the said sampling processing of falling, obtain the said sampled signal of falling according to said selected targeted rate.
Preferably, further adjusted two-way of said shift frequency or the said interpolation broadband signal more than the two-way are closed the road processing, obtain one tunnel said interpolation broadband signal.
Preferably, power average and the predefined threshold margin through said broadband signal obtains said power threshold.
Preferably, approach the said peak value of roughly selecting, obtain said peak pulse signal through said typical peak value is smoothly reached Filtering Processing.
Compared with prior art, technical scheme of the present invention adopts parallel organization to carry out peak clipping and handles, and has solved peak value regeneration problem to a certain extent preferably.And, compare prior art, technical scheme of the present invention is further handled through under the friction speed rate, carrying out peak value retrieval and peak value offset in the peak clipping processing procedure, has reduced the demand to hardware resource.It is a kind of at one-segment and multiple frequency bands broadband signal that the present invention provides; The despicking method under the discontinuous frequency band signal particularly; Be applicable to any system of broadband wireless communication; Include but not limited to mobile radio system,, include but not limited to broadcasting and satellite communication system like GSM, TD-SCDMA, UMTS, CDMA, LTE, WiMax system and mutual various mixed modular system.
Other features and advantages of the present invention will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in specification, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Description of drawings
Accompanying drawing is used to provide the further understanding to technical scheme of the present invention, and constitutes the part of specification, is used to explain technical scheme of the present invention with embodiments of the invention, does not constitute the restriction to technical scheme of the present invention.In the accompanying drawings:
Fig. 1 is the composition sketch map of the peak clipping system of the embodiment of the invention one one-segment broadband signal;
Fig. 2 be embodiment illustrated in fig. 1 in a kind of implementation sketch map of filtering interpolation;
Fig. 3 roughly selects peak value sequence distribution schematic diagram in embodiment illustrated in fig. 1;
Fig. 4 is the selected peak signal sequence distribution schematic diagram in embodiment illustrated in fig. 1;
Fig. 5 is the sketch map that typical peak value is carried out special processing in embodiment illustrated in fig. 1;
Fig. 6 is the schematic flow sheet of the despicking method of the embodiment of the invention two one-segment broadband signals;
Fig. 7 is the composition sketch map of the peak clipping system of the embodiment of the invention three multiple frequency bands broadband signals;
Fig. 8 is the schematic flow sheet of the despicking method of the embodiment of the invention four multiple frequency bands broadband signals;
Fig. 9 is a kind of frequency range planning sketch map of TD-SCDMA system;
Figure 10 is the peak clipping schematic flow sheet of dual-band broadband signal under the TD-SCDMA system;
Figure 11 is the accumulated probability density profile comparison diagram before and after the peak clipping flow process shown in Figure 10.
Embodiment
Below will combine accompanying drawing and embodiment to specify execution mode of the present invention, how the application technology means solve technical problem to the present invention whereby, and the implementation procedure of reaching technique effect can make much of and implement according to this.
At first, if do not conflict, the mutually combining of each characteristic among the embodiment of the invention and the embodiment is all within protection scope of the present invention.In addition; Can in computer system, carry out in the step shown in the flow chart of accompanying drawing such as a set of computer-executable instructions, and, though logical order has been shown in flow chart; But in some cases, can carry out step shown or that describe with the order that is different from here.
The peak clipping system of embodiment one, one-segment broadband signal
As shown in Figure 1, present embodiment comprises that mainly Digital Up Convert (DUC) module 110, peak value roughly select the selected module of module 120, Digital Down Convert (DDC) module 130, peak value 140, peak value offset module 150 and time delay module 160, wherein:
Digital Up Convert (DUC) module 110 is used to realize the speed adjustment of broadband signal, roughly selects the targeted rate of module 120 and pending broadband signal is carried out filtering interpolation handles according to the preset peak value that is adapted to, and obtains the interpolation broadband signal;
Fig. 2 is a kind of implementation sketch map of filtering interpolation; As shown in Figure 2, wherein x (n) is for treating the one-segment broadband signal sequence of filtering, and h (k), k=1,2....K are filter coefficient, and pulse (pulse) signal is Digital Up Convert (DUC) the module 110 resulting interpolation broadband signals that obtain;
Peak value is roughly selected module 120; Link to each other with Digital Up Convert (DUC) module 110; Be used to realize that to the roughly selecting of interpolation broadband signal what obtain to be higher than in the interpolation broadband signal preset power threshold roughly selects the peak value row labels (such as the index of roughly selecting peak value is carried out mark) of going forward side by side;
Fig. 3 be through peak value roughly select module 120 carry out peak value roughly select obtain after handling roughly select peak value sequence distribution schematic diagram, characterize the characteristic distributions of roughly selecting the peak value sequence that obtains after filtering through power threshold;
Digital Down Convert (DDC) module 130 is roughly selected module 120 with peak value and is linked to each other, and is used for falling sampling processing according to the preset selected targeted rate that is adapted to the selected module 140 of peak value to roughly selecting peak value, obtains falling sampled signal;
The selected module 140 of peak value; Link to each other with Digital Down Converter Module 130; Be used for realizing screening rejecting to falling sampled signal, self adaptation keeps typical peak value, utilizes typical peak value to approach to roughly select peak value (to roughly select peak value such as approaching through the special processing to typical peak value; Special processing wherein is such as being smoothly to reach Filtering Processing), obtain the peak pulse signal;
Above-mentioned typical peak value is meant in necessarily roughly selecting peak value bunch (confirms by roughly selecting the peak value step-length) that the numerical value of peak value is all roughly selected the numerical value of peak value greater than front and back, the characteristic of atypia peak value before and after can comprising through the characteristic of the typical peak value after the special processing like this;
Fig. 4 carries out the selected peak signal sequence distribution schematic diagram that the selected processing of peak value obtains afterwards through the selected module 140 of peak value, characterizes the characteristic distributions through the selected peak signal sequence after the selected processing of peak value;
Fig. 5 is the sketch map that typical peak value is carried out special processing (present embodiment is smoothly to reach Filtering Processing); The wherein screening of typical peak value; Can dynamically adjust relevant parameter according to signal frame format characteristic and carrier number; Typical case's peak value special processing algorithm can be for encouraging the typical peaks value sequence through a series of prototype filters of design, and wherein the pulse duration of prototype filter and length can dynamically be adjusted according to signal frame format characteristic and carrier number;
Peak value offset module 150; Link to each other with the selected module 140 of peak value; The peak pulse signal that is used for obtaining according to the selected module 140 of peak value is handled carry out the peak value offset peak clipping through the original one-segment broadband signal behind the fixed response time; Obtain peak clipping and handle one-segment broadband signal afterwards, be referred to as the peak clipping signal;
Time delay module 160 links to each other with peak value offset module 150, is used for that original one-segment broadband signal is carried out an above-mentioned fixed response time and also sends to peak value offset module 150; Original one-segment broadband signal is input to Digital Up Convert module 110 and time delay module 160 simultaneously.
To the peak clipping system of embodiment one described one-segment broadband signal, the despicking method embodiment that can contrast one-segment broadband signal shown in Figure 6 understands.
The despicking method of embodiment two, one-segment broadband signal
In conjunction with the peak clipping system of one-segment broadband signal shown in Figure 1, present embodiment shown in Figure 6 mainly comprises the steps:
Step S610 carries out the filtering interpolation processing according to the preset targeted rate of roughly selecting to the one-segment broadband signal, obtains the interpolation broadband signal, to realize the speed adjustment to the one-segment broadband signal; Comprising according to roughly selecting the coefficient that targeted rate is provided with the difference filter that filtering interpolation uses;
Step S620 realizes the function of roughly selecting to the interpolation broadband signal, and what obtain to be higher than in the interpolation broadband signal preset power threshold roughly selects the peak value row labels (such as the index of roughly selecting peak value is carried out mark) of going forward side by side;
Wherein, from the interpolation broadband signal, obtain to be higher than the determination methods of roughly selecting peak value of power threshold, can carry out according to following expression formula (1);
Wherein, x
1(n) be pending interpolation broadband signal, X
ThBe the power threshold that designs in advance, x '
1(n) for roughly selecting peak value;
Step S630 falls sampling processing according to preset selected targeted rate to roughly selecting peak value, obtains falling sampled signal;
Step S640; Screen rejecting to falling sampled signal; Self adaptation keeps typical peak value, utilizes typical peak value to approach to roughly select peak value (particularly, such as being to approach through the special processing to typical peak value to roughly select peak value; Special processing wherein is such as being smoothly to reach Filtering Processing), obtain the peak pulse signal;
Step S650 carries out the peak value offset peak clipping according to the original one-segment broadband signal of peak pulse signal after to a fixed response time and handles, and obtains the peak clipping signal;
Wherein, estimate processing delay and compensation according to the disposal ability of system after, guarantee that the counteracting that the peak pulse signal carries out on the time domain after consistent with original one-segment broadband signal time delay handles, detailed process can adopt the mode shown in the expression formula (2) to carry out:
y
2(n)＝x
2(n)-x′
2(n) (2)
Wherein, x
2(n) be the original one-segment broadband signal sequence after the certain time delay processing of process, x '
2(n) the peak pulse signal that obtains for step S640, y
2(n) be the one-segment broadband signal sequence after handling through peak clipping.
The peak clipping system of embodiment three, multiple frequency bands broadband signal
As shown in Figure 7; Present embodiment comprises that mainly Digital Up Convert (DUC) module 710, shift frequency module 720, peak value roughly select the selected module of module 730, frequency-division filter module 740, Digital Down Convert (DDC) module 750, peak value 760, peak value offset module 770 and time delay module 780, wherein:
Digital Up Convert (DUC) module 710; Be used for realizing respectively the speed adjustment of the broadband signal more than two-way or the two-way; Roughly select the target speed of module 730 and the band signal of respectively having a lot of social connections is carried out filtering interpolation handle according to being adapted to peak value, obtain the above interpolation broadband signal of two-way or two-way respectively;
Peak value is roughly selected module 730; Link to each other with shift frequency module 720; Be used to realize that to the roughly selecting of reasonable processing module 720 resulting one tunnel interpolation broadband signals of shift frequency what obtain to be higher than in this one tunnel interpolation broadband signal preset power threshold roughly selects the peak value row labels (such as the index of roughly selecting peak value is carried out mark) of going forward side by side;
Frequency-division filter module 740 is roughly selected module 730 with peak value and is linked to each other, and be used for the interpolation broadband signal of roughly selecting beyond the peak value is suppressed to handle, and shift frequency obtains the baseband signal of zero-frequency to zero-frequency;
Digital Down Convert (DDC) module 750 links to each other with frequency-division filter module 740, is used for according to the preset selected targeted rate that is adapted to the selected module 760 of peak value sampling processing being fallen in the baseband signal of zero-frequency, obtains falling sampled signal;
The selected module 760 of peak value; Link to each other with Digital Down Converter Module 750; Be used for realizing screening rejecting to falling sampled signal, self adaptation keeps typical peak value, utilizes typical peak value to approach to roughly select peak value (to roughly select peak value such as approaching through the special processing to typical peak value; This special processing is such as level and smooth and Filtering Processing), obtain the peak pulse signal;
Peak value offset module 770; Link to each other with the selected module 760 of peak value; The peak pulse signal that is used for obtaining according to the selected module 140 of peak value is handled carry out the peak value offset peak clipping through the original band signal of respectively having a lot of social connections behind the fixed response time, obtains the peak clipping signal corresponding to the band signal of respectively having a lot of social connections;
The despicking method of embodiment four, multiple frequency bands broadband signal
In conjunction with the peak clipping system of multiple frequency bands broadband signal shown in Figure 7, present embodiment shown in Figure 8 mainly comprises the steps:
Step S810 carries out the filtering interpolation processing according to the preset targeted rate of roughly selecting to two-way or the broadband signal more than the two-way, obtains the above interpolation broadband signal of two-way or two-way, to realize the speed adjustment to two-way or the broadband signal more than the two-way;
Step S820; Each road interpolation broadband signal shift frequency is adjusted on the predetermined separately center frequency point; To realize shift frequency to each road interpolation broadband signal, if desired each road interpolation broadband signal is closed the road and handle, then each road interpolation broadband signal is closed the road processing and obtain one tunnel interpolation broadband signal; Comprising the time delay of calculating and adjust every road signal, guarantee on time domain, to carry out after frame head or the time delay unanimity of every road signal the stack of corresponding points; Otherwise, directly obtain execution in step S830 after one tunnel interpolation broadband signal; Wherein, closing the road handles and can carry out according to expression formula as follows (3):
Wherein, x
m(n) be the baseband signal sequence of corresponding frequency m.y
3(n) for closing the baseband signal sequence behind the road;
Step S830 realizes the function of roughly selecting to the interpolation broadband signal, and what obtain to be higher than in the interpolation broadband signal preset power threshold roughly selects the peak value row labels (such as the index of roughly selecting peak value is carried out mark) of going forward side by side;
Step S840 the interpolation broadband signal of roughly selecting beyond the peak value is suppressed to handle, and shift frequency obtains the baseband signal of zero-frequency to zero-frequency;
Step S850 falls sampling processing according to preset selected targeted rate to the baseband signal of zero-frequency, obtains falling sampled signal;
Step S860; Screen rejecting to falling sampled signal, self adaptation keeps typical peak value, utilizes typical peak value to approach to roughly select peak value (to roughly select peak value such as approaching through the special processing to typical peak value; Special processing wherein is such as being smoothly to reach Filtering Processing), obtain the peak pulse signal;
Step S870 handles carry out the peak value offset peak clipping through the original band signal of respectively having a lot of social connections behind the fixed response time according to the peak pulse signal, obtains the peak clipping signal corresponding to broadband signal.
Below be the part detail content that example specifically describes technical scheme of the present invention with third generation TD-SCDMA system signal.With the two-band is example, and the requirement source of two-band is in the requirement of the TD of China Mobile standard.China Mobile has two frequency ranges to be used for TD-SCDMA at present, and its frequency range planning is as shown in Figure 9.The signal bandwidth of its Mid Frequency 1 is BW1, and the bandwidth of frequency range 2 is BW2, and the road bandwidth of closing of frequency range 1 and frequency range 2 is BW3.Consider factors such as hardware resource is limited, this example assumes signal peak is roughly selected and on F1 speed, is realized, the selected and peak value offset process of peak value is carried out on F2 speed.Each hardware of handling is formed and can be realized by fpga chip that possesses high speed processing or asic chip.
Shown in figure 10, this example specifically comprises the steps:
Step SA1 carries out k times of interpolation (can be that the multilevel interpolation cascade reaches k times of interpolation, also single-stage be interpolated into k doubly) and filtering respectively to the broadband signal of frequency range 1 and frequency range 2, obtains frequency range 1 and the burst of frequency range 2 under the F1 speed respectively;
Step SA2 after the processing of burst through digital controlled oscillator (NCO) to frequency range under the F1 speed 1 and frequency range 2, obtains shape interpolation broadband signal as shown in Figure 2;
Step SA3 carries out peak value to the interpolation broadband signal and roughly selects and get, and obtains being higher than the peak value of roughly selecting of power threshold; Wherein, power threshold can be through the power average P of input signal (frequency range 1 and frequency range 2 these two frequency ranges close road signal)
sWith predefined threshold margin Δ P
sCalculate;
Step SA4 carries out shift frequency along separate routes to the peak value sequence of roughly selecting under the F1 speed, through low pass filter reasonable in design, obtains the peak value of roughly selecting of frequency range 1 and frequency range 2 respectively;
Step SA5, respectively to frequency range 1 and frequency range 2 roughly select the peak value filtering of sampling, obtain roughly selecting the peak value sequence under the F2 speed, wherein the sampling filtering here can be that primary sampling also can be that the multistage sampling cascade is accomplished;
Step SA6 carries out adaptive selection to the peak value sequence of roughly selecting under the F2 speed, obtains typical peak value;
Step SA7 utilizes a series of filters that the typical peaks value sequence is carried out special processing (present embodiment is smoothly to reach Filtering Processing), and through behind phase place and the delay compensation, forms the peak pulse signal;
Step SA8, respectively with the peak pulse signal of frequency range 1 and frequency range 2 and through the time primary signal delayed carry out time domain and offset, obtain the burst after the peak clipping.
Figure 11 is the accumulated probability density profile comparison diagram (can be referred to as the CCDF curve chart) before and after this routine peak clipping flow process.Wherein, transverse axis is the numerical value of the peak-to-average force ratio of signal to be analyzed, and the longitudinal axis is the probability of the instantaneous peak-to-average force ratio of analytic signal greater than transverse axis numerical value.
Can find out that through above embodiment and corresponding practical application compared with prior art, technical scheme provided by the present invention is retrieved thick peak signal on high speed signal; Carry out on low speed signal that peak value screening is picked, peak pulse moulding and peak value offset, in the signal peak clipping of widebandization, obtained tangible peak clipping advantage, reached the peak clipping effect of expection; Reduced signal peak-to-average ratio in the wideband system, reduced the probability of peak value regeneration to a certain extent, extenuated the impact of high-power signal power amplifier; Effectively improved power amplification efficiency; Reduce hardware and realized resource, reduced system power dissipation and system cost, increased the competitive advantage of system.
Should be noted that technical scheme of the present invention is applicable to the signal peak clipping process of any system of broadband wireless communication, includes but not limited to that with TD-SCDMA system, UMTS system be the 3-G (Generation Three mobile communication system) of representative; Include but not limited to the LTE system be representative the 4th generation communication system; Be particularly useful for TD-SCDMA system (1.28Mcps TDD) and 3.84McpsTDD system in the 3-G (Generation Three mobile communication system); Equally also be applicable to frequency division multiple access and time-division multiple address system and other employing OFDM (OFDM) communication system that other adopts synchronization CDMA; Any technical staff with knowledge background such as signal processing, communications; The peak clipping process that is equal to or simply substitutes that technical scheme is carried out according to the present invention, it all should be included in thought of the present invention and the scope, should belong within the protection range of accompanying claims of the present invention.
In addition, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize by calculation element.Like this, the present invention is not restricted to any specific hardware and software combination.
And though the execution mode that the present invention disclosed as above, the execution mode that described content just adopts for the ease of understanding the present invention is not in order to limit the present invention.Technical staff under any the present invention in the technical field; Under the prerequisite of spirit that does not break away from the present invention and disclosed and scope; Can do any modification and variation what implement in form and on the details; But scope of patent protection of the present invention still must be as the criterion with the scope that appending claims was defined.
Claims (10)
1. the peak clipping system of a broadband signal is characterized in that, comprising:
The Digital Up Convert module is used for according to the preset targeted rate of roughly selecting said broadband signal being carried out the filtering interpolation processing, obtains the interpolation broadband signal;
Peak value is roughly selected module, is used for obtaining the peak value of roughly selecting that said interpolation broadband signal is higher than preset power threshold;
Digital Down Converter Module is used for according to preset selected targeted rate sampling processing being fallen in the said peak value of roughly selecting, and obtains falling sampled signal;
The selected module of peak value is used for the said sampled signal of falling is screened, and self adaptation keeps typical peak value, utilizes said typical peak value to approach the said peak value of roughly selecting, and obtains the peak pulse signal;
The peak value offset module is used for handling carry out the peak value offset peak clipping through the said broadband signal behind the fixed response time according to said peak pulse signal, obtains the peak clipping signal.
2. system according to claim 1 is characterized in that, this system further comprises:
The shift frequency module is used for two-way or the said interpolation broadband signal shift frequency more than the two-way are adjusted to predetermined separately center frequency point, obtains said interpolation broadband signal;
The frequency-division filter module be used for said interpolation broadband signal of roughly selecting beyond the peak value is suppressed to handle, and shift frequency obtains the baseband signal of zero-frequency to zero-frequency;
Wherein, said Digital Down Converter Module is used for according to said selected targeted rate said baseband signal being carried out the said sampling processing of falling, and obtains the said sampled signal of falling.
3. system according to claim 2 is characterized in that:
Said shift frequency module is further used for adjusted two-way of said shift frequency or the said interpolation broadband signal more than the two-way are closed the road processing, obtains one tunnel said interpolation broadband signal.
4. according to the described system of each claim of claim 1 to 3, it is characterized in that:
Said peak value is roughly selected module and is used for obtaining said power threshold through the power average and the predefined threshold margin of said broadband signal.
5. system according to claim 1 is characterized in that:
The selected module of said peak value is used for approaching the said peak value of roughly selecting through said typical peak value is smoothly reached Filtering Processing, obtains said peak pulse signal.
6. the despicking method of a broadband signal is characterized in that, comprises the steps:
The targeted rate of roughly selecting according to preset is carried out the filtering interpolation processing to said broadband signal, obtains the interpolation broadband signal;
Obtain to be higher than in the said interpolation broadband signal peak value of roughly selecting of preset power threshold;
Selected targeted rate according to preset is fallen sampling processing to the said peak value of roughly selecting, and obtains falling sampled signal;
The said sampled signal of falling is screened, and self adaptation keeps typical peak value, utilizes said typical peak value to approach the said peak value of roughly selecting, and obtains the peak pulse signal;
Handle carry out the peak value offset peak clipping through the said broadband signal behind the fixed response time according to said peak pulse signal, obtain the peak clipping signal.
7. method according to claim 6 is characterized in that, this method further comprises:
Two-way or the said interpolation broadband signal shift frequency more than the two-way are adjusted on the predetermined separately center frequency point, obtained said interpolation broadband signal;
Said interpolation broadband signal of roughly selecting beyond the peak value is suppressed to handle, and shift frequency obtains the baseband signal of zero-frequency to zero-frequency;
Wherein, said baseband signal is carried out the said sampling processing of falling, obtain the said sampled signal of falling according to said selected targeted rate.
8. method according to claim 7 is characterized in that:
Further adjusted two-way of said shift frequency or the said interpolation broadband signal more than the two-way are closed the road processing, obtain one tunnel said interpolation broadband signal.
9. according to the described method of each claim of claim 6 to 8, it is characterized in that:
Power average and predefined threshold margin through said broadband signal obtain said power threshold.
10. method according to claim 6 is characterized in that:
Approach the said peak value of roughly selecting through said typical peak value is smoothly reached Filtering Processing, obtain said peak pulse signal.
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| CN103685097A (en) * | 2012-09-05 | 2014-03-26 | 京信通信系统（中国）有限公司 | Method, device, and system for signal processing |
| CN106506429A (en) * | 2016-11-24 | 2017-03-15 | 电子科技大学 | A kind of peak value offset method for ofdm system |
| CN111770042A (en) * | 2019-04-01 | 2020-10-13 | 天津工业大学 | Peak-to-average power ratio restraining method and device for generalized frequency division multiplexing system |
| WO2020238371A1 (en) * | 2019-05-30 | 2020-12-03 | 中兴通讯股份有限公司 | Peak clipping method and apparatus based on polyphase structure, and computer storage medium |
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