Method for and device for reducing peak to average power ratio
View Patent ↗The present disclosure provides a method and device for reducing peak to average power ratio. A first communication is analyzed to a first in-phase parameter X u and a first quadrate parameter Y u ; the first in-phase parameter X u and the first quadrate parameter Y u are both compressed to a second compressed in-phase parameter X u ′ and a second compressed quadrate parameter Y u ′; a second compressed communication signal will be synthesized according to the second compressed in-phase parameter X u ′ and the second compressed quadrate parameter Y u ′. The disclosure can effectively reduce the peak to average power ratio of communication signals.
1. A method for reducing peak to average power ratio applied in a device, the device comprising a compressor which includes a processor configured to process a first communication signal, the method comprising:
decomposing the first communication signal into two signal components comprising a first in-phase signal component X u and a first quadrate signal component Y u ;
setting two parameters K 1 and K 2 for compressing the first communication signal, wherein the parameter K 1 is an absolute value of a maximum value between the first in-phase signal component X u after being compressed and the first quadrate signal component Y u after being compressed, and the parameter K 2 is a constant that is set according to need-compression amplitude;
compressing the first in-phase signal component X u and the first quadrate signal component Y u to obtain a second compressed in-phase signal component X u ′ and a second compressed quadrate signal component Y u ′, according to the parameter K 1 , the parameter K 2 , and a compression-transform function; and
synthesizing the second compressed in-phase signal component X u ′ and the second compressed quadrate signal component Y u ′ to a second compressed communication signal.
2. The method as claimed in claim 1 , wherein the compression-transform function is: X u ′=K 1 *erf (K 2 *X u ), Y u ′=K 1 *erf (K 2 *Y u ).
3. The method as claimed in claim 1 , further comprising:
decomposing the second compressed communication signal into two signal components comprising a third in-phase signal component X u ″ and a third quadrate component Y u ″;
reading the parameter K 1 and the parameter K 2 ;
expanding the third in-phase signal component X u ″ and the third quadrate signal component Y u ″ to obtain a fourth expanded in-phase signal component X u ′″ and a fourth expanded quadrate signal component Y u ′″, according to the parameter K 1 , the parameter K 2 and an inverse function of the compression-transform function; and
synthesizing the fourth expanded in-phase signal component X u ′″ and the fourth expanded quadrate signal component Y u ′″ to a third expanded communication signal.
4. The method as claimed in claim 3 , wherein the inverse function of the compression-transform function is X u ′″=1/K 2 *erf(X u ″/K 1 ), Y u ′″=1/K 2 *erf(Y u ″/K 1 ).
5. A device for reducing peak to average power ratio, comprising a compressor:
the compressor comprising:
at least one processor;
a storage system; and
one or more programs that are stored in the storage system and executed by the at least one processor, the one or more programs including instructions for:
decomposing a first communication signal into two signal components comprising a first in-phase signal component X u and a first quadrate signal component Y u ;
setting two parameters K 1 and K 2 for compressing the first communication signal, wherein the parameter K 1 is an absolute value of a maximum value between the first in-phase signal component X u after being compressed and the first quadrate signal component Y u after being compressed, and the parameter K 2 is a constant that is set according to need-compression amplitude;
compressing the first in-phase signal component X u and the first quadrate signal component Y u to obtain a second compressed in-phase signal component X u ′ and a second compressed quadrate signal component Y u ′, according to the parameter K 1 , the parameter K 2 and a compression-transform function; and
synthesizing the second compressed in-phase signal component X u ′ and the second compressed quadrate signal component Y u ′ to a second compressed communication signal.
6. The device as claimed in claim 5 , wherein the transform function is X u ′=K 1 *erf(K 2 *X u ), Y u ′=*erf(K 2 *Y u ).
7. The device as claimed in claim 5 , wherein the one or more programs that are stored in the storage system and executed by the at least one processor, the one or more programs further including instructions for:
decomposing the second compressed communication signal into two signal components comprising a third in-phase signal component X u ″ and a third quadrate signal component Y u ″;
reading the parameter K 1 and the parameter K 2 ;
expanding the third in-phase signal component X u ″ and the third quadrate signal component Y u ″ to obtain a fourth expanded in-phase signal component X u ′″ and a fourth expanded quadrate signal component Y u ′″, according to the parameter K 1 , the parameter K 2 and a inverse function of the compression-transform function;
synthesizing the fourth expanded in-phase signal component X u ′″ and the fourth expanded quadrate signal component Y u ′″ to a third expanded communication signal.
8. The device as claimed in claim 7 , wherein the inverse function of the compression-transform function is X u ′″=1/K 2 *erf(X u ″/K 1 ), Y u ′″=1/K 2 *erf (Y u ″/K 1 ).