Title :
A new nonlinear companding transform for reducing peak-to-average power ratio of OFDM signals
Author :
Cao, Ruoyun ; Yang, Xiaodong ; Ye, Rui
Author_Institution :
Dept. of Electr. & Inf. Eng., Shunde Polytech., Foshan, China
Abstract :
In this paper we determine and modify the values of the two parameters in the companding transform function proposed previously. The CCDF of the compressed signals is derived and it shows good PAPR reduction ability. BER of the modified scheme is simulated, which shows that when combined with oversampling, the scheme can achieved good BER performance. Power spectrum density of the compressed signals is also depicted and compared with that of the original OFDM signals.
Keywords :
OFDM modulation; transforms; OFDM signals; PAPR reduction; nonlinear companding transform; orthogonal frequency division multiplexing; peak-to-average power ratio; power spectrum density; Bit error rate; Distribution functions; Equations; Peak to average power ratio; Simulation; Transforms; Companding transform; OFDM; PAPR;
Conference_Titel :
Broadband Network and Multimedia Technology (IC-BNMT), 2011 4th IEEE International Conference on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-61284-158-8
DOI :
10.1109/ICBNMT.2011.6155911
