Reducing the PAPR of OFDM Signals Based on SCHT Precoding

Zhongpeng Wang

School of Information and Electronic Engineering, Zhejiang University of Science and Technology, Hangzhou, China.

DOI: 10.4236/jsip.2012.32030                

Abstract

The precoding scheme based on real Hadamard transform is an effective and flexible way for reducing the peak-to-average power ratio (PAPR) of OFDM signals. However, the reduction capacity of PAPR is limited for real Hadamard transform method. In this paper, the new scheme based on complex Hadamard transform is proposed. The simulation results indicate that the proposed scheme may obtain a 1.2 dB PAPR reduction of OFDM signal with only moderate complexity compared with the real Hadamard transform.

Keywords

Complex Hadamard Transform; PAPR; Precoding; OFDM

Conflicts of Interest

The authors declare no conflicts of interest.

References

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