Greatest common divisor matrix based phase sequence for PAPR reduction in OFDM system with low computational overhead

Reduction of high Peak-to-Average Power Ratio (PAPR) is a very important issue in Orthogonal Frequency Division Multiplexing (OFDM) system. In this contribution, we propose a new phase sequence that can be used in Selective Mapping (SLM) technique; a well known PAPR reduction method. Generated from Greatest Common Divisor (GCD) Matrix, we show that our proposed phase sequence possesses better PAPR reduction capability compared to the Bauml sequence often used in SLM technique. From simulation results, we demonstrate that the proposed sequence achieves 3.2 dB higher PAPR reduction compared to SLM method with Bauml sequence and also reduces the computational overhead about 65 percent.