Title :
Differential evolution algorithm for PAPR reduction in OFDM systems
Author :
Ait Saadi, H. ; Guessoum, Abderrezak ; Chouinard, Jean-Yves
Author_Institution :
Dept. de l´Electron., Univ. Saad Dahlab, Blida, Algeria
Abstract :
Orthogonal Frequency Division Multiplexing (OFDM) is is a sophisticated multicarrier modulation technique. It´s known by its robustness against frequency selective fading channels. In return, the major drawback of OFDM is the high peak-to-average power ratio (PAPR) of the transmitted signal. This feature makes the OFDM signals very sensitive to non-linearities of the High Power Amplifier (HPA). Partial transmit sequence (PTS), is one of the most attractive method to reduce the PAPR in OFDM systems. It achieves considerable PAPR reduction without distortion, but it requires an exhaustive search over all the combinations of the given phase factors, which results in a computational complexity increases exponentially with the number of partitions. We propose in this paper, a sub-optimal PTS method based on Differential Evolution optimization method (DE), reducing efficiently the computational complexity.
Keywords :
OFDM modulation; fading channels; power amplifiers; HPA; OFDM system; PAPR reduction; PTS; differential evolution algorithm; frequency selective fading channel; high peak-to-average power ratio; high power amplifier; orthogonal frequency division multiplexing; partial transmit sequence; sophisticated multicarrier modulation technique; Computational complexity; Minimization; Partial transmit sequences; Peak to average power ratio; Time domain analysis;
Conference_Titel :
Systems, Signal Processing and their Applications (WOSSPA), 2011 7th International Workshop on
Conference_Location :
Tipaza
Print_ISBN :
978-1-4577-0689-9
DOI :
10.1109/WOSSPA.2011.5931444