Reducing PAPR in OFDM system by cyclic convolution method

Abstract

In this paper, a novel cyclic convolution method is proposed to reduce the peak-to -average-power ratio (PAPR) of the orthogonal frequency division multiplexing (OFDM) signals. This method transforms the parallel signals of OFDM into other parallel signals with lower PAPR by cyclic convolution operation. With cyclic convolution by an appropriate vector, a significant reduction of PAPR can be obtained. The simulation by MATLAB exhibits that the PAPR can be restricted within 7dB, nevertheless the increasing of the complexity is relatively little.