A Scheme to Reduce the PAPR of OFDM System in Power Line Communication Channels

doi:10.16046/j.cnki.issn2096-5680.2019.04.006

Journal of Hebei University of Water Resources and Electric Engineering ›› 2019, Vol. 29 ›› Issue (4): 40-45.DOI: 10.16046/j.cnki.issn2096-5680.2019.04.006

• Technology Theory and Application • Previous Articles Next Articles

A Scheme to Reduce the PAPR of OFDM System in Power Line Communication Channels

GAO Yun-li ^1，4，GONG Xiang^2，3，LIU Xin-tong^1，4

1.Department of Automation and Communication Engineering，Hebei University of Water Resources and Electric Engineering，061001，Cangzhou，Hebei，China;
2.Cangzhou Technology Innovation Center of Industrial Manipulator Control and Reliability，061001，Cangzhou，Hebei，China;
3.Department of Electrical Power Engineering，Hebei University of Water Resources and Electric Engineering，061001，Cangzhou，Hebei，China;
4.Water Resources Automation and Informatization Application Technology Research and Development Center of Hebei College，061001，Cangzhou，Hebei，China

Received:2019-04-02 Revised:2019-09-24 Online:2019-12-31 Published:2020-01-30

一种降低电力线OFDM系统PAPR的方法

高云丽^1，4，宫翔^2，3，刘昕彤^1，4

1.河北水利电力学院自动化与通信工程学院，河北省沧州市重庆路1号 061001;
2.沧州市工业机械手控制与可靠性技术创新中心，河北省沧州市重庆路1号 061001;
3.河北水利电力学院电气工程学院，河北省沧州市重庆路1号 061001;
4.河北省高校水利自动化与信息化应用技术研发中心，河北省沧州市重庆路1号 061001

作者简介:高云丽(1987-)，女，河北廊坊人，河北水利电力学院助教，硕士，研究方向为通信与信息系统｡E-mail:1291167073@qq.com
基金资助:
2018年河北省省级科技计划自筹经费项目（18212108)

Abstract

Abstract: Orthogonal frequency division multiplexing(OFDM)is the main modulation technology of power line communication(PLC).However，its peak average power ratio(PAPR)will lead to nonlinear distortion of the system，deteriorated transmission performance of the system and higher bit error rate.Thus reducing the PAPR of OFDM system is the main research problem of this technology.In this paper，a modified scheme based on the MSLM algorithm by Wang et al.is proposed，which can produce more candidate signals and further reduce the PAPR of the system by applying partition one complex signals into two real signals and time-domain sub-block conversion matrices.The analysis and simulation results show that，under the premise of ensuring the BER performance，compared to the original algorithm，the modified scheme can reduce the PAPR of the system as well as decrease the complexity greatly.

Key words: power-line communication, OFDM, PAPR, BER, complexity

摘要： 正交频分复用(OFDM)是电力线通信的主要调制技术,但其存在的高峰均功率比(PAPR)会使系统出现非线性失真,系统的传输性能也将变得恶化,增加误码率,因此降低OFDM系统的PAPR是该技术的主要研究问题。文中对Wang et al.提出的MSLM算法进行了改进,通过应用信号的虚、实部的分离和时域子块变换矩阵,可以产生出更多的候选信号,从而使系统的PAPR大幅减小。经过理论分析与MATLAB仿真,与原算法相比,文中的改进算法不仅减小了系统PAPR,降低了计算复杂度,而且保证了系统误码率(BER)基本不变。

关键词: , 电力线, OFDM, PAPR, BER, 计算复杂度

CLC Number:

GAO Yun-li , GONG Xiang, LIU Xin-tong. A Scheme to Reduce the PAPR of OFDM System in Power Line Communication Channels[J]. Journal of Hebei University of Water Resources and Electric Engineering, 2019, 29(4): 40-45.

高云丽, 宫翔, 刘昕彤. 一种降低电力线OFDM系统PAPR的方法[J]. 河北水利电力学院学报, 2019, 29(4): 40-45.

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A Scheme to Reduce the PAPR of OFDM System in Power Line Communication Channels

一种降低电力线OFDM系统PAPR的方法

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