Optimized phase sequence set for SLM-OFDM

Abstract

Selected mapping (SLM) technique is one of the promising peak-to-average power ratio (PAPR) reduction techniques for orthogonal frequency division multiplexing (OFDM). In SLM, the selection of phase sequence sets is an important factor for PAPR reduction. In this paper, a new criterion based on the correlationship between alternative signals is firstly proposed to examine the effects of different phase sequence sets in SLM scheme. According to the criteria, the chaotic phase sequence set is combined for optimizing the PAPR reduction performance. Simulation results show that the proposed technique could improve the PAPR reduction performance of SLM scheme more effectively compared with other phase sequence sets as introduced in the work of Bauml et al. (1996).