OFDM system with reduce peak-to-average power ratio using optimum combination of partial transmit sequences

Abstract

In this paper, we propose a new peak-to-average power ratio (PAPR) reduction scheme of orthogonal frequency division multiplexing (OFDM) system, called invasive weed optimization (IWO)scheme, which considerably reduces the computational complexity with keeping the similar PAPR reduction performance compared with the conventional partial transmit sequences (PTS) scheme. PTS is a distortionless PAPR reduction technique, but its high search complexity for finding optimal phase factors must be reduced for usable applications. The proposed scheme is analytically and numerically evaluated for the OFDM system specified in the IEEE 802.16 standard. IWO based PTS is compared to different PTS schemes for PAPR reduction and search complexity performances. The simulation results show that the proposed IWO-based PTS method provides good PAPR reduction and bit error rate (BER) performances. © 2013 Springer-Verlag Berlin Heidelberg.