Reduction in PAPR of OFDM Signals Using Hybrid Technique

Abstract

A major drawback of orthogonal frequency division multiplexing is the high peak-to-average power ratio of the transmitted signal. PTS and SLM are the well known distortionless PAPR reduction techniques. In this paper, hybrid of these two schemes is done. In SLM different phase rotations are used while in PTS different combinations of phase rotations are used. In the proposed technique, different phase rotations as well as different combinations of these phase rotations are used. Simulation results show that the new scheme can achieve higher PAPR reduction but with increased complexity compared to conventional PTS scheme.