Full Text:   <2193>

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CLC number: TN92

On-line Access: 2019-12-10

Received: 2018-07-18

Revision Accepted: 2018-12-08

Crosschecked: 2019-11-12

Cited: 0

Clicked: 5423

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Yi-hu Xu

http://orcid.org/0000-0002-7387-1865

Myoung-Seob Lim

http://orcid.org/0000-0001-8978-7660

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Frontiers of Information Technology & Electronic Engineering  2019 Vol.20 No.11 P.1587-1594

http://doi.org/10.1631/FITEE.1800438


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


Author(s):  Yi-hu Xu, Jung-Yeol Oh, Zhen-hao Sun, Myoung-Seob Lim

Affiliation(s):  Deptarment of Communication Engineering, Yanbian University, Yanji 133002, China; more

Corresponding email(s):   xuyh@ybu.edu.cn, mslim@jbnu.ac.kr

Key Words:  Orthogonal frequency division multiplexing, Peak-to-average power ratio, Nonlinear scaling, Frequency modulation


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Yi-hu Xu, Jung-Yeol Oh, Zhen-hao Sun, Myoung-Seob Lim. 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.

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doi="10.1631/FITEE.1800438"
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Abstract: 
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 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.

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

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。

关键词:正交频分复用;峰均比;非线性缩放;调频技术

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Reference

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