PAPR Reduction of OFDM Signals Using Partial Transmit Sequences with Modified Phase Generation Mechanism

Abstract

This paper proposes a modified threshold selection partial transmit sequence (M-TS-PTS) technology, which is mainly used to reduce the peak-to-average power ratio (PAPR) of an orthogonal frequency division multiplexing (OFDM) system. The phase generation mechanism of the TS-PTS technology mainly divides the complex phase value used to disturb the input signal into two parts, the real part value and the Imaginary part value, and establishes a threshold value to determine the number of candidate signals. The transmitted signal is obtained by selecting the signal with the smallest PAPR from these candidate signals. Although the TS-PTS technology can reduce the amount of calculations required by the traditional PTS technology, how to improve the performance of the TS-PTS technology to reduce the PAPR is one of the popular research topics. This paper is mainly based on the architecture of TS-PTS technology to study an improved phase generation mechanism and threshold. The simulation results show that the recommended method not only retains the advantages of TS-PTS technology, but has better performance in reducing PAPR than the two technologies of TS-PTS and traditional PTS.