中文摘要：

利用雷达信号的时频分布，进行时频图像代数特征提取，提出了将时频分布图像的奇异值和不变矩两组代数特征联合作为特征模板，以实现雷达信号几种基本脉内调制方式的有效分类。针对单一特征难以区分的情况，两组代数特征能够相互补充，是一组良好的分类特征模板。

英文摘要：

In this paper, how to extract the algebra characteristics from TFD image of radar signal is researched. Then, the method to classify the radar signal intra-pulse modulation efficiently by the signlar value and invariant moments characteristics is proposed. Aimed at the problem which it is difficult to efficiently classify the radar intra-pulse modulation type just according to one characteris- tic, the two algebra characteristics can be combined and they can support each other. And they are excellent characteristics template.