电子学报 ›› 2017, Vol. 45 ›› Issue (11): 2575-2581.DOI: 10.3969/j.issn.0372-2112.2017.11.002

• 学术论文 • 上一篇    下一篇

类奈曼-皮尔逊检验加权lp相关的干扰鲁棒同步算法

李舟帆, 李旦, 张建秋   

  1. 复旦大学信息科学与工程学院, 智慧网络与系统研究中心和电子工程系, 上海 200433
  • 收稿日期:2016-08-26 修回日期:2017-01-20 出版日期:2017-11-25 发布日期:2017-11-25
  • 作者简介:李舟帆,男,1992年11月出生于上海,2015年在复旦大学电子工程系获得理学学士学位.现为复旦大学电子工程系硕士在读生,主要研究方向为通信信号处理等.E-mail:15210720031@fudan.edu.cn;李旦,男,1982年1月出生,江苏省常州人.2013年在复旦大学电子工程系获得理学博士学位.现为复旦大学电子工程系讲师.主要从事信号处理及其在雷达、图像和材料检测中的应用.E-mail:lidan@fudan.edu.cn
  • 基金资助:
    国家自然科学基金(No.61571131)

An Interference Robust Synchronization Algorithm with Neyman-Pearson-Like Test Weighted lp-Correlation

LI Zhou-fan, LI Dan, ZHANG Jian-qiu   

  1. The Research Center of Smart Networks and Systems, School of Information Science and Technology, Fudan University, Shanghai, 200433, China
  • Received:2016-08-26 Revised:2017-01-20 Online:2017-11-25 Published:2017-11-25

摘要: 为实现正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)系统的时域同步,本文利用ZC(Zadoff-Chu)序列提出了类奈曼-皮尔逊检验加权的lpp=1或2)相关(Neyman-Pearson-like test Weighted lp-Correlation,lp-NPWC)同步算法.分析表明:该算法利用类奈曼-皮尔逊检验能有效抑制多径效应对lp相关同步的影响,特别地,当取p=1时,它对重尾分布噪声及循环前缀导致的伪峰具有极强的鲁棒性.实验及仿真结果均证明了理论分析的正确性和有效性,并表明本文算法相较于现有算法在各种干扰环境中均具有更高的同步精度和性能.

关键词: 正交频分复用, ZC序列, 时延估计, lp相关, 奈曼-皮尔逊检验, 重尾噪声, 多径效应

Abstract: An interference robust synchronization algorithm with Neyman-Pearson-like test weighted lp-Correlation (lp-NPWC) for the timing synchronization of an Orthogonal Frequency Division Multiplexing (OFDM) system is presented by a Zadoff-Chu (ZC) sequence.The analytical results show that our Neyman-Pearson-like test weighted synchronization algorithm can reduce the multipath effects on the lp correlation synchronization,where p=1 or 2.Especially,when p=1,it is found that our algorithm is robust to the noise with a heavy-tailed distribution and fake peaks caused by a cyclic prefix.Both experiment and simulation results verify the effectiveness of analytical ones,while our algorithm is shown with higher synchronization accuracy than those of the known ones in literature.

Key words: orthogonal frequency division multiplexing (OFDM), ZC sequence, timing offset estimation, lp-correlation, Neyman-Pearson test, heavy-tailed noise, multipath effect

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