The optimization of PAPR reduction in the OFDM-IM system

Abstract

In this paper, the main purpose is to study how to reduce PAPR in the OFDM-IM system. According to some methods used in the OFDM system, have a further exploration analysis in OFDM-IM system. Firstly, it is about the OFDM-IM system introduction and the effect of PAPR on the OFDM-IM system. Secondly, SLM and PTS are studied in many aspects in the direction of OFDM, like the choice of phase and subcarrier grouping patterns. When phase factor is {1, -1}, the method used in OFDM is borrowed in PTS to improve the calculation time of results in the OFDM-IM system. In addition, the comparative analysis of PAPR under the combination of SLM-PTS and SLM-PTS methods is also studied. It can be concluded that the new method combines the characteristics of both, and its running time is less than that of traditional PTS and the performance of PAPR is less than that of traditional single SLM.