Wigner—Ville分布和模糊函数对多个LFM信号检测性能分析  

Detection Performance of Multi-LFM Signals Based on Wigner-Ville Distribution and Ambiguity Function

作　　者：牛岩[1] 李文臣[1] 李盾[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《电子对抗》2009年第4期19-24,共6页Electronic Warfare

摘　　要：现代雷达系统中，线性调频（LFM）信号是一种常用的脉冲压缩雷达信号。文章对LFM信号的Wigner-Ville分布进行Wigner．Hough变换得到Wigner-Ville分布图（WVD），并对模糊函数进行Wigner-Hough变换得到模糊图。通过数字仿真对比得出模糊函数需要取绝对值才能利用Hough变换检测直线，受交叉项影响大一些。而Wigner-Ville分布函数可以直接利用Hough变换检测直线，交叉项得到抑制，检测效果好，验证了分析的结论。该文的研究对LFM信号检测性能分析有一定的指导意义。Linear FM （LFM） signal is a commonly used pulse compression radar signal in modern radar system. Wigner-Hough Transform is used to get the Wigner-Ville Distribution and Ambiguity Distribution of multi-LFM signals in this paper. The results through simulations testified the conclusion. If absolute value of Ambiguity Distribution is get, it could get beelines, but the result is effected much bigger by across items. While through WVD it could get beelines straight and across items would counteract. This paper can help the analysis of LFM signal detection performance.

关 键 词：线性调频 WIGNER-VILLE分布 模糊图 Hough变换 

分 类 号：TN958[电子电信—信号与信息处理] TN911.23[电子电信—信息与通信工程]