基于ZAM分布的伪码调相与正弦调频复合引信信号特征参数提取技术

Technique of Feature Parameter Extraction Based on ZAM Distribution for PN-SFM Combined Fuze Signal

伪码调相与正弦调频引信信号特征参数提取是对该引信进行有效欺骗性干扰的前提。为提取特征参数,提出了基于ZAM分布的信号特征参数提取方法。首先对侦察的复合引信信号进行ZAM变换,将ZAM分布图进行投影获得负尖峰位值,通过搜索最小时间间隔提取伪码特征参数,利用峰值跟踪曲线提取正弦调频信号的特征参数。仿真分析表明,该方法能有效提取复合引信信号的所有特征参数。

Feature parameters of extraction of pseudo noise - sine frequency modulation combined fuze signal is the precondition of jamming fraudulently. To extract the feature parameters of fuze, the paper presented a method of feature parameter extraction based on ZAM distribution. The detected combined fuze signal is ZAM transformed firstly. The location of negative aiguilles is got by projection of ZAM distribution figure. By searching the minimum time interval vector we can extract the feature parameters of PN code are extracted. According to the peak value following curve we can extract the feature parameters of sine frequency modulation signal. Simulation proves that all of the feature parameters of the combined fuze signal can be extracted effectively.