J4 ›› 2015, Vol. 42 ›› Issue (1): 174-179.doi: 10.3969/j.issn.1001-2400.2015.01.028

• 研究论文 • 上一篇    下一篇

低信噪比下多相码信号检测与参数估计方法

王晓峰1,2;张国毅2;芮国胜1   

  1. (1. 海军航空工程学院 电子信息工程系,山东 烟台  264001;
    2. 空军航空大学 信息对抗系,吉林 长春  130022)
  • 收稿日期:2013-10-18 出版日期:2015-02-20 发布日期:2015-04-14
  • 通讯作者: 王晓峰
  • 作者简介:王晓峰(1987-),男,海军航空工程学院博士研究生,E-mail: wxf870516@126.com.
  • 基金资助:

    国家自然科学青年基金资助项目(61102109)

Detection and parameter estimation of the polyphase code signal in a low SNR

WANG Xiaofeng1,2;ZHANG Guoyi2;RUI Guosheng1   

  1. (1. Dept. of Electronic Engineering, Naval Aeronautical and Astronautical Univ., Yantai  264001, China;
    2. Dept. of Electronic Countermeasure, Aviation Univ. of Air Force, Changchun  130022, China)
  • Received:2013-10-18 Online:2015-02-20 Published:2015-04-14
  • Contact: WANG Xiaofeng

摘要:

针对低信噪比下多相码信号的检测与参数估计问题,提出了基于扩展Wigner-Hough变换(WHT)的多相码信号检测与参数估计方法.该方法依据多相码信号在Wigner-Ville分布(WVD)中表现为多条平行脊线的特点,通过改进WHT的核函数,累积了多相码信号WVD的多条脊线能量,在完成信号检测的同时,估计出多相码信号的调制参数.理论分析和仿真实验结果均表明,该方法能够在较低信噪比下完成多相码信号的检测和参数估计,且不受编码类型的影响.

关键词: 信号检测, 参数估计, 多相码信号, Wigner-Hough变换, 低信噪比

Abstract:

A detection and parameter estimation method based on expanded Wigner-Hough transform(WHT) is proposed to solve the detection and parameter estimation problem of the polyphase code signal in a low SNR. The polyphase code signal exhibits the characteristics of parallel multi-ridges in Wigner-Ville distribution(WVD). According to the characteristics, the expanded WHT uses the improved kernel function to cumulate the energy of polyphase code signal parallel multi-ridges in WVD. It can complete the signal detection and estimate the signal's modulation parameter. Theoretical analysis and simulation both indicate that the expanded WHT can accomplish the detection and parameter estimation of the polyphase coded signal in a low SNR, and is not affected by the coding type.

Key words: signal detection, parameter estimation, polyphase code signal, Wigner-Hough transform, low SNR