Optimized Evaluation of SLM and PTS Techniques for Obtaining the Accurate Papr Reduction in OFDM System

Abstract

Orthogonal Frequency Division Multiplexing (OFDM) is an attractive and promising technique for fourth generation wireless communication due to high data rate. Even though with many advantages it has disadvantage that the time domain of OFDM signal is a sum of subcarrier sinusoidal, which gives high Peak to Average Power Ratio (PAPR).High Peak-to-Average Power Ratio (PAPR) is one of the major and important drawback of the Orthogonal Frequency Division Multiplexing. Both selected mapping (SLM) and partial transmit sequence (PTS) recognize as efficient PAPR reduction algorithms over traditional algorithms. A relative comparison between them is performed to understand the both algorithms reliability in PAPR reduction and both these algorithms belongs to distortion less PAPR reduction algorithms. In this work a comparison is carried out between SLM and PTS based on complementary cumulative distribution function (CCDF) and simulation results are defined based on probability. Simulation results show PTS system acts better in increasing probability scenario while SLM system gets impaired in same scenario.In the future work, OSLM is used as an extension for the proposed method to improve performance as well as reliability in OFDM system.