The active set method of the transformation that peaktoaverage power ratio reduces is realized by retaining tone
The active set method of the transformation that peaktoaverage power ratio reduces is realized by retaining tone
 CN 101,237,262 B
 Filed: 01/30/2007
 Issued: 07/06/2016
 Est. Priority Date: 01/30/2007
 Status: Active Grant
First Claim
1. an active set peaktoaverage power ratio minishing method, including:
 Described active set is initialized as the position n of the amplitude peak sampling only comprising the signal carrying out peaktoaverage power ratio reduction；
Symbolic blocks X={X for each QAM modulation_{0},X_{1},…
,X_{N1}Calculate L oversampling time domain primary signal x, X and represent the block of N number of complex values symbol, N represents the number of qam symbol, X_{i}It is (i+1) the individual qam symbol in X and is modulated on (i+1) individual subcarrier, and retain collection P={P for tone_{0},P_{1},…
,P_{N1}Calculate L oversampling timedomain signal p_{0}, P represents tone and retains collection, P_{i}It it is the value being modulated on ith subcarrier；
Amplitude of finding out is higher than the ratio expectation low predetermined amplitude level of peak level and position not all samplings in the active set, and is stored in test set B their position；
Calculate the amplitude of the position sampling that is in active set exceed expectation peak level beyond value, namelyL=1,2 ..., M, wherein M represents p_{0}The number of times of cyclic shift；
According to equation below (1), use described beyond valueWith by the p through cyclic shift_{0}The matrix of sampling composition solve balanced vector α
;
Chinese PRB Reexamination
Abstract
A kind of active set PAR minishing method has low computing cost and delay.The final peak value being decreased below desired peak level only in all peak values generating the signal that can result be obtained with alternative manner eliminates signal or after reaching maximum iteration time, just carries out summation and completes peak value and eliminate by primary signal and peak value eliminate signal.PAR minishing method eliminates for peak value eliminates the high computing cost that achievement is accumulated in each sampling of each iteration.In ith iteration, the method is attempted obtaining i peak value of the signal that can result be obtained and is reduced to the interpeak elimination signal of desired peak level.The method only calculates the sampling of interpeak elimination signal and the peak level only in primary signal carries out balanced test higher than selecting on the portion of threshold value.
12 Claims

1. an active set peaktoaverage power ratio minishing method, including:

Described active set is initialized as the position n of the amplitude peak sampling only comprising the signal carrying out peaktoaverage power ratio reduction； Symbolic blocks X={X for each QAM modulation_{0},X_{1},…
,X_{N1}Calculate L oversampling time domain primary signal x, X and represent the block of N number of complex values symbol, N represents the number of qam symbol, X_{i}It is (i+1) the individual qam symbol in X and is modulated on (i+1) individual subcarrier, and retain collection P={P for tone_{0},P_{1},…
,P_{N1}Calculate L oversampling timedomain signal p_{0}, P represents tone and retains collection, P_{i}It it is the value being modulated on ith subcarrier；Amplitude of finding out is higher than the ratio expectation low predetermined amplitude level of peak level and position not all samplings in the active set, and is stored in test set B their position； Calculate the amplitude of the position sampling that is in active set exceed expectation peak level beyond value, namelyL=1,2 ..., M, wherein M represents p_{0}The number of times of cyclic shift； According to equation below (1), use described beyond valueWith by the p through cyclic shift_{0}The matrix of sampling composition solve balanced vector α
;


2. in accordance with the method for claim 1, additionally include, if having reached maximum iteration time or balanced scalar equal to one, then calculate peak value and eliminateWith output signal x'"'"'=x+c.

3. in accordance with the method for claim 2, additionally including, once calculate described peak value to eliminate signal, just terminating described method.

4. in accordance with the method for claim 1, additionally include, without reaching maximum iteration time or balanced scalar is not equal to one, then iterations is increased by one.

5. in accordance with the method for claim 4, additionally include, start iteration step after which calculating the described step place beyond value.

6. in accordance with the method for claim 1, the initial size of wherein said active set is one.

7. in accordance with the method for claim 1, wherein iterations is initially set to one.

8. in accordance with the method for claim 2, wherein said balanced scalar μ
 is to position n_{1},n_{2},…
,n_{M}The amplitude peak of the x+c at place carries out balanced with the amplitude peak of the x+c in other position.
 is to position n_{1},n_{2},…

9. in accordance with the method for claim 2, wherein said balanced vector [α

_{1},α
_{2},…
,α
_{M}] for produce be equal to expectation peak level x+c by position n_{1},n_{2},…
,n_{M}M peak value of location.

_{1},α

10. in accordance with the method for claim 1, wherein X includes N number of complex values symbolic blocks, and described piece is create by a part for incoming bit stream is mapped to qam symbol, X_{i}It is (i+1) the individual symbol in X and is modulated on (i+1) individual subcarrier.

11. in accordance with the method for claim 10, if wherein (i+1) individual subcarrier is to retain tone, then X_{i}It is zero, is otherwise qam symbol.

12. in accordance with the method for claim 1, if wherein (i+1) individual subcarrier is to retain tone, then P_{i}For nonzero constant, it is otherwise zero.
Specification(s)