基于LWigner分布的多径ESM信号估计

Journal of Systems Engineering and Electronics ›› 2009, Vol. 31 ›› Issue (11): 2618-2621 .

基于LWigner分布的多径ESM信号估计

李林,姬红兵

西安电子科技大学电子工程学院, 陕西西安 710071

出版日期:2009-11-26 发布日期:2010-01-03

Estimation of multipath ESM signals based on LWigner distribution

LI Lin,JI Hong-bing

School of Electronic Engineering, Xidian Univ., Xi’an 710071, China

Online:2009-11-26 Published:2010-01-03

摘要/Abstract

摘要：

针对电子支援测量(electronic support measurement, ESM)信号存在多径干扰，从而影响信号特征提取以及雷达辐射源识别的问题，提出了一种基于LWigner分布的多径信号估计方法。首先分析了多径ESM信号模型和时频域匹配滤波算法，接着研究了LWigner分布对于多分量高阶频率调制信号的分辨性能，根据自身项和交叉项的不同特点，提出采用LWigner分布对多径信号进行估计。该方法计算简单，保证了估计结果具有较高的分辨性能。仿真实验结果证明了方法的正确性和有效性。

Abstract:

Usually, there exist multipath interference in electronic support measurement (ESM) signals, which will influence the correctness of feature extraction and radar emitter recognition. A multipath estimation method based on LWigner distribution is proposed. First, ESM signal mode and match filtering in timefrequency domain are analyzed. Then the resolution ability of LWigner distribution is demonstrated for multicomponent higher order frequency modulated signals. According to the properties of self and cross terms, the LWigner distribution is used for match filtering in timefrequency domain. This method is simple in calculation and guarantees the high resolution ability of the estimation result. Finally, simulation experiments on intrapulse frequency modulation signals verify the correctness and efficiency of the proposed method.

李林,姬红兵. 基于LWigner分布的多径ESM信号估计[J]. Journal of Systems Engineering and Electronics, 2009, 31(11): 2618-2621 .

LI Lin,JI Hong-bing. Estimation of multipath ESM signals based on LWigner distribution[J]. Journal of Systems Engineering and Electronics, 2009, 31(11): 2618-2621 .