现代防御技术 ›› 2023, Vol. 51 ›› Issue (1): 59-66.DOI: 10.3969/j.issn.1009-086x.2023.01.008

• 目标特性与探测跟踪技术 • 上一篇    下一篇

一种基于关联脉冲对的动态直方图分选算法

左峰1,2, 曹兰英1, 杨健2   

  1. 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
  • 收稿日期:2022-06-15 修回日期:2022-08-17 出版日期:2023-02-28 发布日期:2023-02-21
  • 作者简介:左峰(1990-),男,江苏响水人。工程师,博士,研究方向为雷达电子战。
  • 基金资助:
    江苏省卓越博士后计划

A Dynamic Histogram Deinterleaving Algorithm Based on Correlated Pulse Pairs

Feng ZUO1,2, Lanying CAO1, Jian YANG2   

  1. 1.Leihua Electronic Technology Institute, AVIC, Wuxi 214063, China
    2.Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
  • Received:2022-06-15 Revised:2022-08-17 Online:2023-02-28 Published:2023-02-21

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。

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

Abstract:

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.

Key words: signal deinterleaving, complex electromagnetic environment, correlated pulse pairs, dynamic box length, sequential difference histogram

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