OFDM系统中利用循环前缀的非迭代相位噪声抑制算法

doi:10.13229/j.cnki.jdxbgxb20161200

吉林大学学报(工学版) ›› 2018, Vol. 48 ›› Issue (1): 295-300.doi: 10.13229/j.cnki.jdxbgxb20161200

OFDM系统中利用循环前缀的非迭代相位噪声抑制算法

袁建国^{1, 2}, 张锡若¹, 邱飘玉¹, 王永^{1, 2}, 庞宇¹, 林金朝^{1, 2}

1. 重庆邮电大学光电信息感测与传输技术重庆市重点实验室,重庆 400065;
2. 重庆邮电大学光通信与网络重点实验室,重庆 400065

收稿日期:2016-11-07 出版日期:2018-02-26 发布日期:2018-02-26
作者简介:袁建国(1968-),男,教授,博士. 研究方向:OFDM通信技术,FEC编译码技术.E-mail:yyyyjg@126.com
基金资助:
国家自然科学基金项目(61472464, 61671091, 61471075); 重庆市基础与前沿研究计划一般项目(cstc 2015jcyjA0554)

Non-iterative phase noise suppression algorithm utilizing cyclic prefix in OFDM systems

YUAN Jian-guo^{1, 2}, ZHANG Xi-ruo¹, QIU Piao-yu¹, WANG Yong^{1, 2}, PANG Yu¹, LIN Jin-zhao^{1, 2}

1. Chongqing Key Laboratory of Photoelectronic Information Sensing and Transmitting Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;
2. Key Laboratory of Optical Communication and Networks, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Received:2016-11-07 Online:2018-02-26 Published:2018-02-26

摘要/Abstract

摘要： 为补偿OFDM系统中相位噪声引发的干扰,提出了一种非迭代的利用循环前缀进行线性内插的相位噪声抑制算法。该算法利用循环前缀与OFDM符号中对应采样点间的相关性,将未受符号间干扰(Inter symbol interference, ISI)的循环前缀应用到对相位噪声的估计中,只需要少量循环前缀即可对原有线性内插算法中的插值点进行优化,通过增加每个OFDM符号中线性内插的插值点数,使得内插估计出的相位噪声更加贴近实际的相位噪声。仿真分析表明,该算法在相位噪声线宽较小时的误码率曲线更能贴近无相位噪声时的曲线,在相位噪声线宽较大时相比原有的相位噪声内插算法有0.8~1.8 dB的增益并能够有效降低错误平层。

关键词: 通信技术, 正交频分复用, 相位噪声, 线性内插, 循环前缀

Abstract: A novel non-iterative phase noise suppression algorithm utilizing Cyclic Prefix (CP) for linear interpolation is proposed to compensate the interference arisen from the phase noise in Orthogonal Frequency Division Multiplexing (OFDM) systems. The algorithm can make full use of the correlation of the CP and the corresponding sample in the OFDM symbol, and apply the Inter-Symbol-Interference (ISI)-free part of the CP to estimate the phase noise. This scheme requires a small amount of the CP to optimize the interpolation point and increases the interpolation points of linear interpolation in each OFDM symbol. The interpolation estimation of the proposed method is more close to the actual phase noise. The analysis of the simulation results shows that the performance of the bit error rate is more approximate to the ideal curve for small phase noise, and the algorithm can improve 0.8 to 1.8 dB gain of the system performance and effectively reduces the error floor under large phase noise.

Key words: communication technology, orthogonal frequency-division multiplexing, phase noise, linear interpolation, cyclic prefix

中图分类号:

TN919

袁建国, 张锡若, 邱飘玉, 王永, 庞宇, 林金朝. OFDM系统中利用循环前缀的非迭代相位噪声抑制算法[J]. 吉林大学学报(工学版), 2018, 48(1): 295-300.

YUAN Jian-guo, ZHANG Xi-ruo, QIU Piao-yu, WANG Yong, PANG Yu, LIN Jin-zhao. Non-iterative phase noise suppression algorithm utilizing cyclic prefix in OFDM systems[J]. 吉林大学学报(工学版), 2018, 48(1): 295-300.

参考文献

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OFDM系统中利用循环前缀的非迭代相位噪声抑制算法

Non-iterative phase noise suppression algorithm utilizing cyclic prefix in OFDM systems

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