Boosted PTS Method with Mu Law Companding Techniques for PAPR Reduction in OFDM Systems

Abstract

Abstract: This paper proposes an enhanced PAPR reduction technique which combines an enhanced PTS method with Mu-Law companding. The enhanced PTS method improves perfor mances in both the partitioning and phase rotation steps. Enhancement in partitioning is achieved through a judicious incorporation of AP-PTS scheme into the IP-PTS. As for phase rotation, an optimal set of rotation vectors is derived based on the correlation prop erties of candidate signals. The PAPR reduction of this enhanced PTS method is further improved by annexing Mu-Law companding at the end of the enhanced PTS. This applica tion of Mu-Law characteristic in the time domain of OFDM signal signifcantly improves the PAPR reduction capability of the approach. Simulation results show that the PAPR performance of the enhanced PTS method with Mu-Law companding technique on vari ous scenarios with diferent modulation schemes is better than that of the PRP-PTS. This approach can be considered as a very attractive candidate for achieving a signifcant reduc tion of PAPR, while maintaining a low computational complexity.