基于符号化序列的PRI调制类型识别  

PRI Modulation Type Identification Based on Symbolic Sequences

作　　者：常安琪 牛栋 乔宏乐[1] 杨柳[1] CHANG Anqi;NIU Dong;QIAO Hongle;YANG Liu(Xi'an Electronic Engineering Research Institute,Xi'an 710100)

机构地区：[1]西安电子工程研究所,西安710100

出　　处：《火控雷达技术》2023年第4期49-56,共8页Fire Control Radar Technology

摘　　要：在复杂多变的雷达对抗作战环境中,准确识别雷达信号的PRI调制类型并估算相应PRI值对有效的电子侦察和进一步的电子攻击有重要意义。本文提出了一种基于符号化序列计算香农熵、峭度和归一化二阶样本矩三个关键特征参数来区分不同的雷达信号PRI调制类型的方法。首先基于五种典型PRI调制类型的PRI和DPRI符号化序列计算得到特征参数,然后依据香农熵识别出抖动PRI,其次通过峭度识别出正弦调制PRI,进一步由归一化二本样阶矩区分正向滑变PRI、组变PRI和反向滑变PRI,最后通过大量的仿真验证了该PRI调制类型识别算法的有效性。In complex and changeable radar countermeasures combat environments,accurately identifying the PRI modulation type of radar signals and estimating the corresponding PRI values are of great significance for effective electronic reconnaissance and further electronic attack.This paper proposes a method to distinguish different PRI modulation types through calculation of three key characteristic parameters,namely Shannon entropy,kurtosis,and normalized second-order sample moment based on symbolic sequences.Firstly,the characteristic parameters are calculated based on the PRI and DPRI symbolic sequences of five typical PRI modulation types.Then the jitter PRI is identified based on Shannon entropy.The sinusoidal modulated PRI is identified through the kurtosis.In addition,the normalized two-sample order moment is used to further distinguish the sliding up PRI,dwell&switch PRI,and sliding down PRI.Finally,a large number of simulation results verify the effectiveness of the proposed PRI modulation type identification algorithm.

关 键 词：脉冲重复间隔 符号化序列 调制类型 识别 

分 类 号：TN95[电子电信—信号与信息处理] TN98[电子电信—信息与通信工程]