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

Yi-hu XU; Jung-Yeol OH; Zhen-hao SUN; Myoung-Seob LIM

doi:10.1631/FITEE.1800438

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

Regular Papers | Updated：2022-05-19

- A novel method for PAPR reduction of the OFDM signal using nonlinear scaling and FM
- 一种基于非线性缩放和调频技术的抑制OFDM信号峰均比方法
- Frontiers of Information Technology & Electronic Engineering Vol. 20, Issue 11, Pages: 1587-1594(2019)
- Affiliations：
  
  Deptarment of Communication Engineering, Yanbian University, Yanji 133002, China
  Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700, Republic of Korea
  Division of Electronics & Information Engineering, Chonbuk National University, Jeonj 561-756, Republic of Korea
- Author bio：
  
  [ "Yi-hu XU, E-mail: xuyh@ybu.edu.cn" ]
  Myoung-Seob LIM, E-mail:mslim@jbnu.ac.kr
- Funds：
- DOI：10.1631/FITEE.1800438
  CLC： TN92
- Received：18 July 2018，
  
  Revised：2019-11-12，
  
  Published：2019-11
- Accepted：
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Yi-hu XU, Jung-Yeol OH, Zhen-hao SUN, et al. A novel method for PAPR reduction of the OFDM signal using nonlinear scaling and FM[J]. Frontiers of Information Technology & Electronic Engineering, 2019, 20(11): 1587-1594.
DOI：

Yi-hu XU, Jung-Yeol OH, Zhen-hao SUN, et al. A novel method for PAPR reduction of the OFDM signal using nonlinear scaling and FM[J]. Frontiers of Information Technology & Electronic Engineering, 2019, 20(11): 1587-1594. DOI： 10.1631/FITEE.1800438.

摘要

正交频分复用（OFDM）是第4代移动通信系统的基本传输技术，在频率选择性衰弱信道环境下具有非常高的传输能力。然而，非恒定包络信号引起的高峰均比（PAPR）是OFDM系统主要缺点之一。OFDM的高峰值信号通过非线性放大器时失真，导致误码率下降。很多关于抑制PAPR的研究都以增加带宽或减少吞吐量为代价，以弥补抑制峰均比所需开销。本文提出一种基于非线性缩放技术的抑制峰均比方法，有效缩放峰值高于非线性放大器阈值的信号，并通过调频技术将缩放时隙位置和缩放比例信息结合在OFDM信号，减少传输所需附加带宽。仿真结果表明，与传统方法相比，所提方法具有更低峰均比，且误码率性能更佳。

Abstract

Orthogonal frequency division multiplexing (OFDM) has been adopted as standard beginning with the 4

generation mobile communication system because of its high-bit-rate transmission capability under frequency selective fading channel conditions. 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 proposed 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.

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Keywords

references

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