A lightweight PAPR reduction scheme using Greatest Common Divisor matrix based SLM technique

Abstract

High Peak to Average Power Ratio (PAPR) is one of the major drawbacks for Orthogonal Frequency Division Multiplexing (OFDM) transmitted signal. Among the PAPR reduction techniques, Selected Mapping (SLM) technique is one of the promising one but results in added computational complexity. In this paper, we applied Greatest Common Divisor (GCD) sequence based SLM method using our proposed reverse searching technique. The proposed scheme is named lightweight as it is very simple to implement and offers improved performance through significant reduction in PAPR and computational complexity. Additionally, we explored side information free transmission with GCD default index that achieves higher throughput but sacrifices slight PAPR reduction.