CN103701748A - Peak clipping method and system for communication system - Google Patents
Peak clipping method and system for communication system Download PDFInfo
- Publication number
- CN103701748A CN103701748A CN201310754581.3A CN201310754581A CN103701748A CN 103701748 A CN103701748 A CN 103701748A CN 201310754581 A CN201310754581 A CN 201310754581A CN 103701748 A CN103701748 A CN 103701748A
- Authority
- CN
- China
- Prior art keywords
- signal
- filter factor
- fre
- peak clipping
- communication system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Transmitters (AREA)
Abstract
The invention relates to a peak clipping method and a peak clipping system for a communication system. The method comprises the steps of calculating filter coefficients of corresponding signals according to numbers of carriers and intermediate frequency of signals of each channel of the communication system; performing up-conversion to the corresponding signals according to the intermediate frequency to obtain up-conversion signals; calculating the amplitudes of the up-conversion signals, performing difference calculation to the amplitudes and preset peak clipping threshold to obtain amplitude differences and multiplying the amplitude difference by the filter coefficient to obtain peak clipping pulses; using the peak clipping pulses to perform peak clipping to the corresponding up-conversion signals. By adopting the scheme provided by the invention, the communication quality is improved.
Description
Technical field
The present invention relates to the communications field, particularly relate to despicking method and the system of communication system.
Background technology
The nonlinear distortion question that power amplifier brings in communication system has caused increasing concern, especially modern communication technology is all multi-carrier signal and mixed mould technology, increased the peak-to-average force ratio of signal, high peak-to-average force ratio means that the power fluctuation scope of signal is very large, when input signal is very large, often easily make power amplifier enter saturation region or cut-off region, produce serious nonlinear distortion.
In order to solve the problem of nonlinear distortion, the method that tradition adopts generally in application by back-off to guarantee the linearity of power amplifier, although the method realizes simple, power amplifier cost is high, efficiency is low, and by rollback power, is inadequate completely in the exigent occasion of the linearity.
Compare with above-mentioned, CFR(crest factor reduces) due to cost is low, convenient for production, power amplification efficiency advantages of higher progressively becomes communication system linearization technique main flow.At present, digital despicking method is mainly to reduce by CFR(crest factor) peak clipping technology can improve power amplification efficiency effectively, and the change along with telephone traffic need to change carrier number in practical communication process, or need to adopt frequency hopping in order to prevent from disturbing, now adopt above-mentioned CFR peak clipping technology because calculating filter coefficient is slower, therefore there will be the phenomenon of mess code, have a strong impact on communication quality, especially under frequency-hopping mode, can cause communication quality variation.
Summary of the invention
Based on this, being necessary, for the poor problem of communication quality, provides a kind of despicking method and system of communication system.
A despicking method for communication system, comprises step:
According to the filter factor of the carrier wave number of the signal of each channel of communication system and IF-FRE calculating respective signal thereof;
According to described IF-FRE, corresponding signal is carried out to upconversion process and obtain up-conversion signal;
Calculate the range value of described up-conversion signal, described range value and default peak clipping threshold value are made to the poor amplitude difference that obtains, by the acquisition peak clipping pulse of multiplying each other of amplitude difference and described filter factor;
Utilize described peak clipping pulse to carry out peak clipping to corresponding up-conversion signal.
A peak clipping system for communication system, comprising:
Coefficients calculation block, for calculating the filter factor of respective signal according to the carrier wave number of the signal of each channel of communication system and IF-FRE thereof;
Up-converter module, obtains up-conversion signal for corresponding signal being carried out to upconversion process according to described IF-FRE;
Magnitude computation module, carries out the range value of the described up-conversion signal after upconversion process for calculating up-converter module;
Do differential mode piece, for described range value and default peak clipping threshold value that magnitude computation module is calculated, make the poor amplitude difference that obtains;
Product module, for multiplying each other and obtain peak clipping pulse doing filter factor that amplitude difference that differential mode piece obtains and coefficients calculation block calculate;
Peak-clipping module, for utilizing the corresponding up-conversion signal after the peak clipping pulse of product module acquisition is processed up-converter module to carry out peak clipping.
The despicking method of above-mentioned communication system and system, by obtaining carrier power, determine carrier wave number and the IF-FRE thereof of signal; According to the filter factor of carrier wave number and IF-FRE calculating respective signal thereof.According to IF-FRE, corresponding signal is carried out to upconversion process and obtain up-conversion signal; Calculate the range value of up-conversion signal, range value and default peak clipping threshold value are made to the poor amplitude difference that obtains, by the acquisition peak clipping pulse of multiplying each other of amplitude difference and filter factor; Utilize peak clipping pulse to carry out peak clipping to corresponding up-conversion signal.Thereby guarantee to calculate fast the peak clipping coefficient mating with carrier information in the quick variation of carrier wave or frequency hopping, and can effectively prevent from causing because of frequency hopping the problem of peak clipping confusion, thereby improved communication quality.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the despicking method embodiment of communication system of the present invention;
Fig. 2 is the structural representation of the peak clipping system embodiment of communication system of the present invention;
Fig. 3 is the structural representation of the peak clipping system employs example of communication system of the present invention.
Embodiment
For the despicking method of communication system of the present invention and each embodiment of system, be described in detail below.
As shown in Figure 1, the schematic flow sheet for the despicking method embodiment of communication system of the present invention, comprises step:
Step S101: according to the filter factor of the carrier wave number of the signal of each channel of communication system and IF-FRE calculating respective signal thereof;
In an embodiment, before step S101, also comprise therein:
The carrier power of the signal of each channel of obtaining communication system, determines carrier wave number and the IF-FRE thereof of signal according to carrier power.
By quick tracking carrier wave, obtain the carrier power of each channel, then according to carrier power size, judge whether each channel signal has carrier wave, and obtain carrier wave number and IF-FRE according to carrier power.
In an embodiment, signal is single mode signal therein;
Filter factor step according to carrier wave number and IF-FRE calculating respective signal thereof, comprising:
k＝0,1,2...N-1
In formula, h (k) represents filter factor, and g (k) represents the prototype filter factor of signal, and N represents the prototype filter factor length of signal, f
sthe sample rate that represents respective signal, M represents carrier wave number, f
jj the IF-FRE that represents respective signal, always total M IF-FRE; G (k), N, f
sall prestore, f
jcan change according to carrier number.Wherein, prototype filter factor refers to the one group of filter factor generating according to different signaling modes, and for example GSM signal bandwidth 200k can arrange passband 100k with MATLAB software so, stopband 150k, thereby can generate one group of filter factor, i.e. prototype filter factor.If WCDMA signal bandwidth 5M can arrange passband 2.5Mk with MATLAB software so, stopband 3M, thus can generate one group of filter factor, i.e. prototype filter factor.Prototype filter factor length is exactly the length of prototype filter factor, and prototype filter factor has been determined the length of N afterwards and just fixed.Sample rate is different according to different systems, and the sample rate here refers to the disappear operating rate at peak of CFR.F
jthe deviation frequency of the relative zero-frequency of corresponding each carrier wave.
The filter factor computational methods that provide in the present embodiment can be at FPGA(Field-Programmable Gate Array, be field programmable gate array), ASIC(Application Specific Integrated Circuit, at integrated circuit circle, be considered to a kind of integrated circuit designing for special object), CPLD(Complex Programmable Logic Device, CPLD) etc. in programmable logic device, realize, thereby completing fast filter factor calculates, improved filter factor computational efficiency, effectively prevent because of the signal deterioration that carrier wave changes or frequency hopping causes and the phenomenon that cannot recover for a long time.Sin (x) and cos (x) adopt the mode of tabling look-up to realize, and the data that only need store 0～pi/2 for saving resource add that some logical process just can complete sin (x) and cos (x) calculates, and the error of calculation is 10
-3.
In an embodiment, signal is mixed mould signal therein;
Filter factor step according to carrier wave number and IF-FRE calculating respective signal thereof, comprising:
k＝0,1,2...N-1
Wherein, h'(k) expression filter factor, g
t(k) represent the prototype filter factor of t kind signal, N
tthe prototype filter factor length that represents t kind signal, M
tthe carrier wave number that represents t kind signal, f
s (t)the sample rate that represents t kind signal, f
j (t)j the IF-FRE that represents t kind signal, w
tthe carrier power that represents t kind signal account for each signal carrier power and percentage, m represents that mixed mould has m kind signal, N represents N
tin maximum;
The present embodiment scheme can be at FPGA, ASIC, the programmable logic devices such as CPLD are realized, support GSM(Global System of Mobile communication, global system for mobile communications)/8PSK((8Phase Shift Keying, 8 phase-shift keyings))/CDMA2000(Code Division Multiple Access2000, a 3G mobile communication standard)/WCDMA(Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA))/LTE(Long Term Evolution, Long Term Evolution) the mixed mould peak clipping of signal such as, and can complete fast CFR design factor, thereby effectively prevent because of the signal deterioration that carrier number changes or frequency hopping causes and the phenomenon that cannot recover for a long time, can guarantee that signal is in the tracking of us level settling signal and peak clipping function.
Wherein with the mixed mould of GSM+WCDMA, describe:
In mixed mould situation, according to carrier power, complete peak clipping pulse weighting:
W
gsm, w
wcdmathe weighted factor of respective signal, concrete big or small according to signal carrier power determination, wherein,
p
gsmfor the carrier power of GSM signal, P
wcdmafor the carrier power of WCDMA signal, w
1+ w
2=1.
Step S102: according to IF-FRE, corresponding signal is carried out to upconversion process and obtain up-conversion signal;
Up-conversion signal is processed can be in the upper realization of DUC (Digital Up Conversion, Digital Up Convert).When signal is single mode signal, according to IF-FRE, corresponding signal is carried out to the up-conversion signal that upconversion process obtains single mode.When signal is mixed mould signal, according to IF-FRE, carrier signal is carried out to the up-conversion signal of up-conversion and the mixed mould of Frequency mixing processing acquisition.
Step S103: calculate the range value of up-conversion signal, range value and default peak clipping threshold value are made to the poor amplitude difference that obtains, by the acquisition peak clipping pulse of multiplying each other of amplitude difference and filter factor; Wherein, by plural delivery value, be exactly amplitude.
In an embodiment, described according to after the filter factor step of carrier wave number and IF-FRE calculating respective signal thereof therein, also comprise: store described filter factor;
Amplitude difference and the described filter factor step that obtains peak clipping pulse that multiplies each other is comprised: according to the signal that amplitude difference is corresponding, from the filter factor of storage, search corresponding filter factor, by the acquisition peak clipping pulse of multiplying each other of the described filter factor finding out and amplitude difference.
Step S104: utilize peak clipping pulse to carry out peak clipping to corresponding up-conversion signal.According to peak clipping pulse, carrying out peak clipping can be that up-conversion signal and peak clipping pulse are done to the poor peak clipping that realizes.
Therein in an embodiment, the carrier power of the signal of each channel of described obtaining communication system, according to described carrier power, determine and comprise carrier wave number and the IF-FRE step thereof of described signal:
Utilize the carrier power of signal of each channel of near-end machine obtaining communication system, according to described carrier power, determine carrier wave number and the IF-FRE thereof of described signal;
Described step S101, step S102, step S103, step S104, comprising:
Utilize remote termination and according to carrier wave number and IF-FRE thereof, calculate the filter factor of respective signal; According to IF-FRE, corresponding signal is carried out to upconversion process and obtain up-conversion signal; Calculate the range value of described up-conversion signal, described range value and default peak clipping threshold value are made to the poor amplitude difference that obtains, by the acquisition peak clipping pulse of multiplying each other of amplitude difference and described filter factor; Utilize described peak clipping pulse to carry out peak clipping to corresponding up-conversion signal.
Therein in an embodiment, based on FPGA, calculate peak clipping coefficient and carry out peak clipping processing, be that step S101, step S102, step S103, step S104 process based on FPGA, can improve and calculate peak clipping coefficient efficiency and peak clipping treatment effeciency, thereby improve communication quality.
This programme is known according to the practical situations of communication, the carrier number of signal changes sometimes fast, in order to reduce interference, also can adopt frequency hopping, want in this case to guarantee normally peak clipping of CFR, need so Fast carrier to follow the tracks of and coefficient calculations, otherwise will cause frequency spectrum to worsen for a long time, Fast carrier of the present invention is followed the tracks of and quick filter coefficient calculations, by certain conversion, complicated coefficient formulas can be put into FPGA goes to calculate, thereby make CFR can upgrade fast filter factor, catch up with the rhythm of frequency hopping, prevent that frequency spectrum from worsening.
According to the despicking method of above-mentioned communication system, the present invention also provides a kind of peak clipping system of communication system, and as shown in Figure 2, the structural representation for the peak clipping system embodiment of communication system of the present invention, comprising:
Coefficients calculation block 210, for calculating the filter factor of respective signal according to the carrier wave number of the signal of each channel of communication system and IF-FRE thereof;
Up-converter module 220, obtains up-conversion signal for corresponding signal being carried out to upconversion process according to IF-FRE;
Magnitude computation module 230, carries out the range value of the up-conversion signal after upconversion process for calculating up-converter module;
Do differential mode piece 240, for range value and default peak clipping threshold value that magnitude computation module is calculated, make the poor amplitude difference that obtains;
Product module 250, for multiplying each other and obtain peak clipping pulse doing filter factor that amplitude difference that differential mode piece obtains and coefficients calculation block calculate;
Peak-clipping module 260, for utilizing the corresponding up-conversion signal after the peak clipping pulse of product module acquisition is processed up-converter module to carry out peak clipping.
In an embodiment, signal is single mode signal therein;
Coefficients calculation block adopts following formula calculating filter coefficient:
k＝0,1,2...N-1
In formula, h (k) represents filter factor, and g (k) represents the prototype filter factor of signal, and N represents the prototype filter factor length of signal, f
sthe sample rate that represents respective signal, M represents carrier wave number, f
jj the IF-FRE that represents respective signal, always total M IF-FRE;
Up-converter module is used for: according to IF-FRE, corresponding signal is carried out to upconversion process and obtain single mode up-conversion signal.
In an embodiment, signal is mixed mould signal therein;
Coefficients calculation block adopts following formula calculating filter coefficient:
k＝0,1,2...N-1
Wherein, h'(k) expression filter factor, g
t(k) represent the prototype filter factor of t kind signal, N
tthe prototype filter factor length that represents t kind signal, M
tthe carrier wave number that represents t kind signal, f
s (t)the sample rate that represents t kind signal, f
j (t)j the IF-FRE that represents t kind signal, w
tthe carrier power that represents t kind signal account for each signal carrier power and percentage, m represents that mixed mould has m kind signal, N represents N
tin maximum;
Up-converter module is used for: according to IF-FRE, carrier signal is carried out to up-conversion and the mixed mould up-conversion signal of Frequency mixing processing acquisition.
In an embodiment, also comprise carrier track module therein, for the carrier power of the signal of each channel of obtaining communication system, according to described carrier power, determine carrier wave number and the IF-FRE thereof of described signal.
In an embodiment, carrier track module is arranged on near-end machine therein; Coefficients calculation block, up-converter module, magnitude computation module, do differential mode piece, product module and peak-clipping module and be arranged on remote termination.
Therein in an embodiment, carrier track module, coefficients calculation block, up-converter module, magnitude computation module, do differential mode piece, product module and peak-clipping module and move on FPGA.
Concrete a utilization in example, as shown in Figure 3, structural representation for the peak clipping system employs example of communication system of the present invention, comprise: carrier track module 301, monitoring module 302, DUC(Digital Up Conversion, Digital Up Convert module) 303, coefficients calculation block 304, magnitude computation module 305, coefficient storage module 306, first do differential mode piece 307, product module 308, time delay alignment module 309, second and do differential mode piece 310.Wherein, on the general FPGA in system of module 301,303,304,305,306,307,308,309,310 or ASIC, move; Monitoring module 302, moving on chip separately, because modules can move on FPGA or ASIC, therefore can improve computational speed greatly.
Carrier track module is added up the carrier power of each channel, judges whether each channel number has carrier wave, and obtain carrier wave number and IF-FRE thereof according to watt level.The carrier information that monitoring module provides according to carrier track module, is handed down to coefficients calculation block and DUC module by IF-FRE.Coefficients calculation block is according to carrier wave number and IF-FRE calculating filter coefficient, and formula is above enumerated, does not repeat them here.The filter factor that coefficient storage module calculates for packing coefficient computing module.Up-conversion and the mixing function of DUC module settling signal.Magnitude computation module can adopt cordic algorithm plural number to be changed into the amplitude of real number.First to do differential mode piece poor by the signal amplitude after up-conversion and peak clipping threshold value, and product module is preserved difference multiply each other with the filter factor of coefficient storage module stores, generates peak clipping pulse.It is the signal after up-conversion is alignd with peak clipping pulse and do poorly that time delay alignment module and second is done differential mode piece, finally completes peak clipping function;
The peak clipping system of communication system of the present invention and the despicking method of communication system of the present invention are one to one, correlation technique feature in the despicking method embodiment of above-mentioned communication system and technique effect thereof are all applicable to, in the peak clipping system embodiment of communication system, not repeat them here.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a despicking method for communication system, is characterized in that, comprises step:
According to the filter factor of the carrier wave number of the signal of each channel of communication system and IF-FRE calculating respective signal thereof;
According to described IF-FRE, corresponding signal is carried out to upconversion process and obtain up-conversion signal;
Calculate the range value of described up-conversion signal, described range value and default peak clipping threshold value are made to the poor amplitude difference that obtains, by the acquisition peak clipping pulse of multiplying each other of amplitude difference and described filter factor;
Utilize described peak clipping pulse to carry out peak clipping to corresponding up-conversion signal.
2. the despicking method of communication system according to claim 1, is characterized in that, described signal is single mode signal;
Described according to the filter factor step of carrier wave number and IF-FRE calculating respective signal thereof, comprising:
k＝0,1,2...N-1
In formula, h (k) represents filter factor, and g (k) represents the prototype filter factor of described signal, and N represents the prototype filter factor length of described signal, f
sthe sample rate that represents respective signal, M represents carrier wave number, f
jj the IF-FRE that represents respective signal;
According to IF-FRE, corresponding signal is carried out to the step that upconversion process obtains up-conversion signal, comprising: according to IF-FRE, corresponding signal is carried out to the up-conversion signal that upconversion process obtains single mode.
3. the despicking method of communication system according to claim 1, is characterized in that, described signal is mixed mould signal;
Described according to the filter factor step of carrier wave number and IF-FRE calculating respective signal thereof, comprising:
k＝0,1,2...N-1
Wherein, h'(k) expression filter factor, g
t(k) represent the prototype filter factor of t kind signal, N
tthe prototype filter factor length that represents t kind signal, M
tthe carrier wave number that represents t kind signal, f
s (t)the sample rate that represents t kind signal, f
j (t)j the IF-FRE that represents t kind signal, w
tthe carrier power that represents t kind signal account for each signal carrier power and percentage, m represents that mixed mould has m kind signal, N represents N
tin maximum;
According to IF-FRE, corresponding signal is carried out to the step that upconversion process obtains up-conversion signal, comprising: according to IF-FRE, carrier signal is carried out to the up-conversion signal of up-conversion and the mixed mould of Frequency mixing processing acquisition.
4. according to the despicking method of the communication system described in claims 1 to 3 any one, it is characterized in that,
Described according to before the filter factor step of the carrier wave number of the signal of each channel of communication system and IF-FRE calculating respective signal thereof, also comprise:
Utilize the carrier power of signal of each channel of near-end machine obtaining communication system, according to described carrier power, determine carrier wave number and the IF-FRE thereof of described signal;
Described according to the filter factor of carrier wave number and IF-FRE calculating respective signal thereof; According to IF-FRE, corresponding signal is carried out to upconversion process and obtain up-conversion signal; Calculate the range value of described up-conversion signal, described range value and default peak clipping threshold value are made to the poor amplitude difference that obtains, by the acquisition peak clipping pulse of multiplying each other of amplitude difference and described filter factor; Utilize described peak clipping pulse to carry out peak clipping step to corresponding up-conversion signal, comprising:
Utilize remote termination and according to carrier wave number and IF-FRE thereof, calculate the filter factor of respective signal; According to IF-FRE, corresponding signal is carried out to upconversion process and obtain up-conversion signal; Calculate the range value of described up-conversion signal, described range value and default peak clipping threshold value are made to the poor amplitude difference that obtains, by the acquisition peak clipping pulse of multiplying each other of amplitude difference and described filter factor; Utilize described peak clipping pulse to carry out peak clipping to corresponding up-conversion signal.
5. according to the despicking method of the communication system described in claims 1 to 3 any one, it is characterized in that, described according to after the filter factor step of carrier wave number and IF-FRE calculating respective signal thereof, also comprise: store described filter factor;
Amplitude difference and the described filter factor step that obtains peak clipping pulse that multiplies each other is comprised: according to the signal that amplitude difference is corresponding, from the filter factor of storage, search corresponding filter factor, by the acquisition peak clipping pulse of multiplying each other of the described filter factor finding out and amplitude difference.
6. a peak clipping system for communication system, is characterized in that, comprising:
Coefficients calculation block, for calculating the filter factor of respective signal according to the carrier wave number of the signal of each channel of communication system and IF-FRE thereof;
Up-converter module, obtains up-conversion signal for corresponding signal being carried out to upconversion process according to described IF-FRE;
Magnitude computation module, carries out the range value of the described up-conversion signal after upconversion process for calculating up-converter module;
Do differential mode piece, for described range value and default peak clipping threshold value that magnitude computation module is calculated, make the poor amplitude difference that obtains;
Product module, for multiplying each other and obtain peak clipping pulse doing filter factor that amplitude difference that differential mode piece obtains and coefficients calculation block calculate;
Peak-clipping module, for utilizing the corresponding up-conversion signal after the peak clipping pulse of product module acquisition is processed up-converter module to carry out peak clipping.
7. the peak clipping system of communication system according to claim 6, is characterized in that, described signal is single mode signal;
Described coefficients calculation block adopts following formula calculating filter coefficient:
k＝0,1,2...N-1
In formula, h (k) represents filter factor, and g (k) represents the prototype filter factor of described signal, and N represents the prototype filter factor length of described signal, f
sthe sample rate that represents respective signal, M represents carrier wave number, f
jj the IF-FRE that represents respective signal;
Described up-converter module is used for: according to IF-FRE, corresponding signal is carried out to upconversion process and obtain single mode up-conversion signal.
8. the peak clipping system of communication system according to claim 6, is characterized in that, described signal is mixed mould signal;
Described coefficients calculation block adopts following formula calculating filter coefficient:
k＝0,1,2...N-1
Wherein, h'(k) expression filter factor, g
t(k) represent the prototype filter factor of t kind signal, N
tthe prototype filter factor length that represents t kind signal, M
tthe carrier wave number that represents t kind signal, f
s (t)the sample rate that represents t kind signal, f
j (t)j the IF-FRE that represents t kind signal, w
tthe carrier power that represents t kind signal account for each signal carrier power and percentage, m represents that mixed mould has m kind signal, N represents N
tin maximum;
Described up-converter module is used for: according to IF-FRE, carrier signal is carried out to up-conversion and the mixed mould up-conversion signal of Frequency mixing processing acquisition.
9. according to the peak clipping system of the communication system described in claim 6 to 8 any one, it is characterized in that, also comprise carrier track module, for the carrier power of the signal of each channel of obtaining communication system, according to described carrier power, determine carrier wave number and the IF-FRE thereof of described signal.
10. the peak clipping system of communication system according to claim 9, is characterized in that,
Described carrier track module is arranged on near-end machine; Described coefficients calculation block, described up-converter module, described magnitude computation module, described in do differential mode piece, described product module and peak-clipping module and be arranged on remote termination, described carrier track module, described coefficients calculation block, described up-converter module, described magnitude computation module, described in do differential mode piece, described product module and peak-clipping module and move on FPGA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310754581.3A CN103701748B (en) | 2013-12-31 | 2013-12-31 | The despicking method and system of communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310754581.3A CN103701748B (en) | 2013-12-31 | 2013-12-31 | The despicking method and system of communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103701748A true CN103701748A (en) | 2014-04-02 |
| CN103701748B CN103701748B (en) | 2017-07-07 |
Family
ID=50363149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310754581.3A Active CN103701748B (en) | 2013-12-31 | 2013-12-31 | The despicking method and system of communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103701748B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018133037A1 (en) * | 2017-01-20 | 2018-07-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for par reduction |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001082547A1 (en) * | 2000-04-19 | 2001-11-01 | Powerwave Technologies, Inc. | System and method for peak power reduction in spread spectrum communications systems |
| CN101136890A (en) * | 2006-09-01 | 2008-03-05 | 中兴通讯股份有限公司 | Optimized multi-carrier signal slicing device and method therefor |
| CN101237435A (en) * | 2007-01-30 | 2008-08-06 | 中兴通讯股份有限公司 | A method and device for reducing multi-carrier signal peak equal ratio |
| CN101330276A (en) * | 2008-08-04 | 2008-12-24 | 京信通信***（中国）有限公司 | Digital predistortion power amplifier and implementing method thereof |
| CN101330324A (en) * | 2008-07-23 | 2008-12-24 | 深圳市云海通讯股份有限公司 | Method, apparatus and system for extracting synchronous indicating signal |
| CN201260165Y (en) * | 2008-08-04 | 2009-06-17 | 京信通信***（中国）有限公司 | Digital predistortion power amplifier |
| CN101645862A (en) * | 2008-08-04 | 2010-02-10 | 中兴通讯股份有限公司 | Method and device for reducing signal peak-to-average ratio |
| CN101651653A (en) * | 2009-09-17 | 2010-02-17 | 京信通信***（中国）有限公司 | Peak clipping method for multi-carrier frequency hopping communication system |
| CN101662450A (en) * | 2009-09-17 | 2010-03-03 | 京信通信***（中国）有限公司 | Table-lookup self-adapting peak-clipping method |
| CN101848182A (en) * | 2009-03-25 | 2010-09-29 | 大唐移动通信设备有限公司 | Method and device for realizing adaptive peak clipping |
| CN101986636A (en) * | 2010-11-19 | 2011-03-16 | 中兴通讯股份有限公司 | Despiking coefficient update method and device suitable for frequency hopping and power fluctuation system |
| CN103312655A (en) * | 2013-05-28 | 2013-09-18 | 京信通信技术(广州)有限公司 | Method and device for optimizing multi-carrier phase |
-
2013
- 2013-12-31 CN CN201310754581.3A patent/CN103701748B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001082547A1 (en) * | 2000-04-19 | 2001-11-01 | Powerwave Technologies, Inc. | System and method for peak power reduction in spread spectrum communications systems |
| CN101136890A (en) * | 2006-09-01 | 2008-03-05 | 中兴通讯股份有限公司 | Optimized multi-carrier signal slicing device and method therefor |
| CN101237435A (en) * | 2007-01-30 | 2008-08-06 | 中兴通讯股份有限公司 | A method and device for reducing multi-carrier signal peak equal ratio |
| CN101330324A (en) * | 2008-07-23 | 2008-12-24 | 深圳市云海通讯股份有限公司 | Method, apparatus and system for extracting synchronous indicating signal |
| CN101330276A (en) * | 2008-08-04 | 2008-12-24 | 京信通信***（中国）有限公司 | Digital predistortion power amplifier and implementing method thereof |
| CN201260165Y (en) * | 2008-08-04 | 2009-06-17 | 京信通信***（中国）有限公司 | Digital predistortion power amplifier |
| CN101645862A (en) * | 2008-08-04 | 2010-02-10 | 中兴通讯股份有限公司 | Method and device for reducing signal peak-to-average ratio |
| CN101848182A (en) * | 2009-03-25 | 2010-09-29 | 大唐移动通信设备有限公司 | Method and device for realizing adaptive peak clipping |
| CN101651653A (en) * | 2009-09-17 | 2010-02-17 | 京信通信***（中国）有限公司 | Peak clipping method for multi-carrier frequency hopping communication system |
| CN101662450A (en) * | 2009-09-17 | 2010-03-03 | 京信通信***（中国）有限公司 | Table-lookup self-adapting peak-clipping method |
| CN101986636A (en) * | 2010-11-19 | 2011-03-16 | 中兴通讯股份有限公司 | Despiking coefficient update method and device suitable for frequency hopping and power fluctuation system |
| CN103312655A (en) * | 2013-05-28 | 2013-09-18 | 京信通信技术(广州)有限公司 | Method and device for optimizing multi-carrier phase |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018133037A1 (en) * | 2017-01-20 | 2018-07-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for par reduction |
| US10666482B2 (en) | 2017-01-20 | 2020-05-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for par reduction |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103701748B (en) | 2017-07-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101136890B (en) | Optimized multi-carrier signal slicing device and method therefor | |
| CN103188199B (en) | A kind of broadband despicking method and device based on fraction delay CPG | |
| CN101076008B (en) | Method and apparatus for processing clipped wave | |
| CN101222468B (en) | Peak-to-average ratio restraining method and device in multi-carrier orthogonal frequency division multiplexing system | |
| CN102075484B (en) | Method and device for reducing peak-to-average power ratio of signal | |
| CN110224967B (en) | Method and transmitter for peak-to-average power ratio reduction | |
| WO2016106719A1 (en) | Signal clipping processing method and apparatus | |
| CN102195912B (en) | Digital pre-distortion processing equipment and method | |
| CN102143114A (en) | Method and apparatus for reducing peak to average power ratio using peak windowing | |
| CN102970266A (en) | Multi-band signal peak clipping method and device | |
| CN111107030B (en) | Method and device for reducing signal peak-to-average power ratio suitable for large bandwidth system | |
| CN104601511A (en) | Multi-rate peak clipping method and device | |
| CN105306403A (en) | Method and system for reducing peak-to-average ratio of transmitting signal of OFDM system | |
| Mohammady et al. | Study of PAPR reduction methods in OFDM systems | |
| CN102404272A (en) | System and a method for processing wireless signals based on coded orthogonal frequency division multiplexing | |
| CN102111372B (en) | Pulse counteraction mode-based peak clipping method | |
| CN103401831A (en) | FPGA (Field Programmable Gate Array)-based LTE (Long Term Evolution) digital intermediate frequency crest factor reduction method and device | |
| CN103916354A (en) | Non-causal Orthogonal Frequency Division Multiplexing Tapered Peak Suppression | |
| CN102244626B (en) | Method and device for reducing peak to mean ratio of signal | |
| CN103001907A (en) | Digital peak clipping method and digital peak clipping device | |
| CN104009954A (en) | Method for achieving Flip-OFDM through fast Hartley transformation | |
| CN103701748A (en) | Peak clipping method and system for communication system | |
| CN101510866A (en) | Method, apparatus and transmitter for restraining signal peak-equal power ratio | |
| CN103974395A (en) | Power adjustment method and device based on low-delay power detection before digital pre-distortion | |
| CN103780531A (en) | Multi-carrier base band peak eliminating device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510663 No. 10 Shenzhou Road, Science City, Luogang District, Guangzhou City, Guangdong Province Patentee after: Jingxin Network System Co.,Ltd. Address before: 510663 No. 10 Shenzhou Road, Science City, Luogang District, Guangzhou City, Guangdong Province Patentee before: Comba Telecom System (China) Ltd. |
|
| CP01 | Change in the name or title of a patent holder |