A Modified Hadamard Based SLM without Side Information for PAPR Reduction in OFDM Systems

作     者：Ning Li Mingjin Li Zhongliang Deng 

作者机构：School of Electronic Engineering Beijing University of Posts and Telecommunications 

出 版 物：《China Communications》 (中国通信（英文版）)

年 卷 期：2019年第16卷第12期

页      面：124-131页

核心收录：

学科分类：0810[工学-信息与通信工程] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0839[工学-网络空间安全] 0804[工学-仪器科学与技术] 080402[工学-测试计量技术及仪器] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：the Wireless Network Positioning and Communication Integration Research Center in BUPT for financial support 

主　　题：OFDM PAPR SLM SI Hadamrd 

摘      要：High peak-to-average power ratio(PAPR) is a concern in orthogonal frequency division multiplexing(OFDM) systems. Hadamard based selected mapping(HSLM) which uses Hadamard code as the phase sequence in selected mapping(SLM) is an attractive technique to reduce PAPR. But it requires sending side information(SI) to the receiver for each data block, and this results in a reduction in bandwidth efficiency. In this paper, we proposed a modified PAPR reduction method called semi-Hadamard based selected mapping(semi-HSLM) to decouple the phase information matrix into a phase rotation matrix for PAPR reduction and a SI matrix for side information hiding. We proposed a semi-hadamard matrix generation method to generate the phase rotation matrix, and designed a cyclic shift matrix as the SI matrix. Compared with the traditional HSLM, the semi-HSLM saves half of the phase storage and achieves good PAPR reduction performance.