A novel method for PAPR reduction of the OFDM signal using nonlinear scaling and FM

作     者：Yi-hu XU Jung-Yeol OH Zhen-hao SUN Myoung-Seob LIM 

作者机构：Deptarment of Communication EngineeringYanbian UniversityYanji 133002China Electronics and Telecommunications Research Institute(ETRI)Daejeon 305-700Republic of Korea Division of Electronics&Information EngineeringChonbuk National UniversityJeonj 561-756Republic of Korea 

出 版 物：《Frontiers of Information Technology & Electronic Engineering》 (信息与电子工程前沿（英文版）)

年 卷 期：2019年第20卷第11期

页      面：1587-1594页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：Project supported by the Research Funds of Chonbuk National University in 2019 and the Natural Science Foundation of Jilin Province China(No.20170520165JH) 

主　　题：Orthogonal frequency division multiplexing Peak-to-average power ratio Nonlinear scaling Frequency modulation 

摘      要：Orthogonal frequency division multiplexing (OFDM) has been adopted as standard beginning with the 4th generation mobile communication system because of its high-bit-rate transmission capability under frequency selective fading channel con-ditions. However, a major disadvantage of OFDM is the non-constant envelope signal with a high peak-to-average power ratio (PAPR). The high peak signal in OFDM is distorted through a nonlinear amplifier, which causes bit error ratio (BER) reduction. Many techniques have been developed for reducing PAPR at the cost of inefficient bandwidth usage or throughput because of the additional information about PAPR reduction. We propose a novel method, in which the high peak signal above the threshold of the nonlinear amplification region is nonlinearly downscaled to lower the PAPR. The time slot location and scaling ratio for where and how the high peak baseband OFDM signal is downscaled are transmitted using frequency modulation (FM) combined with OFDM, which requires less additional bandwidth than the previously proposed methods. Simulation results show that the pro-posed novel method provides a lower PAPR and elicits a better BER performance compared with other conventional methods, because it reduces the PAPR by nonlinear scaling and restores the pre-distorted signal using FM.