摘要
雷达脉内混合信号的特征提取和分析是电子对抗领域的重要研究课题之一。维格纳-威利(Wigner-Ville)分布法是分析雷达脉内信号的有效途经,但由于Wigner-Ville分布是双线性变换,用它来分析脉内混合信号时,交叉项将会严重影响信号特征分析。采用平滑伪Wigner-Ville(SPWD)对交叉项进行抑制,计算机仿真表明取得了满意的时-频分布。
The characteristics extraction and analysis of radar intra-pulse mixed-signal is an important task in ECM. Wigner-Ville distribution （WVD） is a effective method to analyze the radar intra-pulse signal,but the WVD is two-linear transform,when it is used in analyzing intra-pulse mixed-signal,the cross-term will have a great influence on signal characteristics analysis. In this paper, smooth and pseudo Wigner-Ville distribution （SPWD） is used in suppressing the cross-term,and the computer simulation indicates that satisfactory time-frequency distribution is obtained.
出处
《舰船电子对抗》
2005年第5期41-44,共4页
Shipboard Electronic Countermeasure
关键词
脉内混合信号
平滑伪维格纳-威利分布
时频分析
intra-pulse mixed signal
smooth and pseudo Wigner-Ville distribution
time-frequency analysis
