A New SLM Algorithm with Low Complexity for PAPR Reduction in OFDM

Thepeak to avemgepwer ratio (PAPR) dishihtion of the @odic orihogonnlfi.quency division multiplexing (OFDM) dain symbol sequence is ewluated and it is shown t h a the OFDM data symbol sequence with short period is wpcted to have high PAPR. Using this result, we identr& the optimal phase sequence set and pmpse mws of a cyclic Hndamard mahu. comtrucfed by msequence as phase sequences for selected mapping (SLM) OFDM The cornpuiationnl complen'ry of conventiono! SLM OFDM is i m m e d extensively in pmprtion fo the number of phase sequences. In order to ovmcome this disadvantage, we pmpose new SLM OFDM scheme. Fmm the simulation m u l b fir the standard of IEEE 802.16 of mobile wimless mefmpolitan area nefwork (WMN) , it is shown ihai new SLM OFDM with 2048 camers reduces the compurational complai* up to 51% while it has almost thesame capabiliq ofPAPR duction compared to that of conventionnl SLM OFDM Since the compuintionnl reduction gain i ncmes as the number of caniers incmases, the pmposed scheme is appmpriate for the high data mte OFDMsysfems. K q w r d s Orthogonal fkqency division multiplexing (OFDW, peak to average power ratio (PAPR), selected