LPI雷达信号特征提取综合时频算法

摘要

Extracting exactly the inner-pulse feature parameter of LPI radar signal was always a difficult problem in radar signal processing. A integrated Time-Frequency method was proposed in this paper. Through the colligation of steady wavelet transformation and precise PWVD transformation! Then we can extract inner-pulse features of radar signal exactly in the integrated Time-Frequency figure. The results of the emulation show the validity of this method.%如何准确提取LPI雷达信号脉内特征参数一直都是雷达信号处理中的一个难点.提出一种综合时频算法来提取雷达信号的脉内特征,首先把稳健的小波变换法与分辨率较高的伪威格纳威尔分布(Pseudo Wigner-Ville Distribution,PWVD)法进行截断综合,再对综合的时频图提取小波脊线从而得到稳健、高精度的脉内特征参数.仿真实验说明了该算法的有效性.