识别雷达信号的脉冲重复间隔(PRI)调制模式是分析雷达工作状态和工作任务的重要手段。针对复杂体制雷达的PRI调制模式可实时切换并改变调制参数因而难于识别的问题,提出一种基于极值序列特征集的雷达PRI调制模式识别算法。该算法首先提取PRI序列的极值特征,构建极值序列特征集;然后,基于PRI序列及其特征集建立恒参、类正弦、正弦和抖动判定准则,实现雷达PRI调制模式的分层识别。仿真分析表明:该算法对复杂体制雷达PRI调制模式的识别正确率达95.3％ ,同时具有较高的实时性,在电子对抗应用领域具有良好的前景。

The recognition of pulse repetition interval(PRI) modulation mode is meaningful for analyzing the condition and task of radar. In order to recognize advanced radar which could change its PRI modulation mode and parameters quickly, a recognition algorithm based on extremum sequence features set is proposed. Firstly, by extracting the extremum sequence features from PRI sequence, the PRI extremum features set is constructed. Then the judge criterions of five PRI modulation modes based on PRI sequence and its extremum features set is proposed. Finally, a multi-layer recognition algorithm is presented. The result shows that the recognition algorithm has preferable recognition correct rate(95.3％), and could classify the PRI modulation modes quickly, so the research has a good application prospect in electronic support measures.

TN957

航空科学基金资助项目;航空科学基金资助项目