Performance analysis of PTS using GPW and RPW to reduce PAPR in OFDM systems

摘要

OFDM is a suitable candidate for high data rate transmission with forward error correction (FEC) methods over wireless channels and there is a growing need to quickly transmit information wirelessly and accurately. This paper proposes a new peak to average power ratio (PAPR) reduction technique. In wideband system, each sub carrier is individually modulated according to channel state information. The proposed method increases the system throughput while maintaining system performance under a desired condition. In order to obtain the optimum condition on partial transmit sequence (PTS) for PAPR reduction, a quite large calculation cost is demanded and thus it is impossible to obtain the optimum PTS in a short time. The PTS technique employs with grouping phase weighting (GPW) and recursive phase weighting (RPW). The proposed reduction method realizes both the advantages of GPW and RPW at the same time. Simulation results show that proposed method improves PAPR in OFDM system with drastic reduction in cost.