基于周期样本图重构的雷达PRI调制类型识别算法研究  

Research on radar PRI modulation type recognition algorithm based on periodic sequence pattern reconstruction

作　　者：薛磊[1] 黄中瑞 刘照龙 XUE Lei;HUANG Zhongrui;LIU Zhaolong(College of Electronic Engineering,National University of Defense Technology,Hefei 230037,China)

机构地区：[1]国防科技大学电子对抗学院,安徽合肥230037

出　　处：《信息对抗技术》2023年第2期75-89,共15页Information Countermeasures Technology

基　　金：国防科技大学科研计划资助项目(JS20-08)。

摘　　要：为提升对雷达脉冲重复间隔(pulse repetition interval,PRI)的分析性能,提出了一种基于周期样本图重构的雷达PRI调制类型识别算法。首先,建立了雷达PRI调制模型,分析了不同调制类型的信号特点;其次,利用到达时间(time of arrival,TOA)多阶差分序列估计了雷达PRI调制周期,并基于直方图算法重构了PRI周期样本图;然后,以PRI周期样本图为基础,提出了5个PRI调制特征实现PRI调制类型识别;该方法不仅能够提升PRI调制类型的识别准确率,而且对干扰脉冲特别是脉冲丢失具有很强的稳健性;最后,仿真实验表明了所提方法的有效性。In order to improve the performance of radar pulse repetition interval(PRI)analy-sis,this paper proposed a PRI modulation type recognition algorithm based on periodic se-quence pattern reconstruction.Firstly,the radar PRI modulation model was established,and the characteristics of different modulation types were analyzed.Secondly,the time of arrival(TOA)multi-order difference sequence was used to estimate the radar PRI modulation peri-od,and the PRI periodic sequence pattern was reconstructed based on the histogram algo-rithm.Then,based on the PRI periodic sequence pattern,five PRI modulation features were proposed to identify the PRI modulation types.This method can not only improve the recog-nition accuracy of PRI modulation type,but also has strong robustness to interference pulse and pulse missing.Finally,simulation results were presented to verify the efficiency of the proposed method.

关 键 词：脉冲丢失 脉冲重复间隔调制周期 PRI周期样本图 PRI调制类型识别 

分 类 号：TN98[电子电信—信息与通信工程]