一种基于关联脉冲对的动态直方图分选算法  

A Dynamic Histogram Deinterleaving Algorithm Based on Correlated Pulse Pairs

作　　者：左峰 曹兰英 杨健[2] ZUO Feng;CAO Lanying;YANG Jian(Leihua Electronic Technology Institute,AVIC,Wuxi 214063,China;Department of Electronic Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]中国航空工业集团公司雷华电子技术研究所,江苏无锡214063 [2]清华大学电子工程系,北京100084

出　　处：《现代防御技术》2023年第1期59-66,共8页Modern Defence Technology

基　　金：江苏省卓越博士后计划。

摘　　要：针对现有分选算法在复杂电磁环境下准确性与效率降低的问题,提出了一种基于关联脉冲对的动态直方图分选方法。该方法首先对到达时间差进行固定箱长统计,将高于检测门限的相邻箱进行合并,得到动态直方图统计结果,估计出潜在PRI(pulse repetition interval)。对潜在PRI对应的关联脉冲对进行分析,剔除虚假PRI并估计出真实PRI的抖动量。最后,再依据PRI参数完成脉冲序列搜索,实现对雷达信号的分选。仿真实验表明,该方法在较低的到达时间差级数条件下,对多部复杂PRI调制信号的分选准确率达到95%,能够对复杂电磁环境下的雷达信号进行有效分选。Aiming at the problem that existing deinterleaving algorithms’ accuracy and efficiency decrease in a complex electromagnetic environment, a dynamic histogram deinterleaving method is proposed based on correlated pulse pairs. The process firstly performs fixed box length statistics on the difference of TOA(time of arrival). It merges adjacent boxes higher than the detection threshold to obtain dynamic histogram statistics and estimate the potential PRI(pulse repetition interval). By analyzing correlation pulse pairs corresponding to the potential PRI, the false PRI is eliminated, and the amount of jitter of the real PRI is estimated. Finally, the pulse sequence search is completed according to the PRI parameters to realize the deinterleaving of radar signals. Simulation experiments show that the method can achieve 95% accuracy in deinterleaving multiple complex PRI modulated signals under a lower depth and the technique can effectively deinterleave radar signals in a complex electromagnetic environment.

关 键 词：信号分选 复杂电磁环境 关联脉冲对 动态箱长 序列差直方图 

分 类 号：TJ01[兵器科学与技术—兵器发射理论与技术] TN91[电子电信—通信与信息系统]