张亮^{1, 2,,},
王国宏¹,
张翔宇¹,
李思文¹
1.海军航空大学 烟台 264001
2.中国人民解放军94326部队 济南 250000
基金项目:国家自然科学基金(61731023, 61701519, 61671462)，“泰山****”攀登计划专项经费资助项目

详细信息

作者简介:张亮：男，1987年生，博士生，研究方向为雷达抗干扰
王国宏：男，1963年生，教授，研究方向为多源信息融合、雷达组网、雷达抗干扰、微弱目标跟踪
张翔宇：男，1986年生，讲师，研究方向为雷达抗干扰、雷达数据处理
李思文：男，1993年生，硕士生，研究方向为雷达抗干扰

通讯作者:张亮　332401479@qq.com

中图分类号:TN957.51

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被引次数:0

出版历程

收稿日期:2019-09-24
修回日期:2020-02-12
网络出版日期:2020-03-03
刊出日期:2020-10-13

Fast-slow Time Domain Joint Processing Suppressing Smeared Spectrum Jamming

Liang ZHANG^{1, 2,,},
Guohong WANG¹,
Xiangyu ZHANG¹,
Siwen LI¹
1. Naval Aviation University, Yantai 264001, China
2. Unit 94326 of the PLA, Jinan 250000, China
Funds:The National Natural Science Foundation of China (61731023, 61701519, 61671462), Taishan Scholar Climbing Plan


摘要
摘要:现有频谱弥散干扰(SMSP)抑制算法以一个长度为雷达发射信号的受干扰回波为处理对象，未涉及相参处理间隔内整体回波。针对此问题，该文以自卫式干扰条件下线性调频(LFM)相参体制雷达抗SMSP干扰为背景，提出快慢时间域联合处理抑制SMSP干扰算法。分析了SMSP干扰时频特征和对相参雷达的干扰特性，在此基础上，设计了慢时间微分熵估计干扰位置，相关系数最大准则估计干扰参数，双正交傅里叶变换快时间分段重构干扰信号和干扰对消的抑制流程。仿真结果表明，所提算法模型与雷达处理流程切合度高，对比分析进一步验证算法效能。
关键词:频谱弥散干扰/
快慢时间域/
联合处理/
干扰对消
Abstract:The existing SMeared SPectrum (SMSP) jamming suppression algorithms take a jammed echo whose length equal to radar transmitting signal as the processing object and do not involve the whole echo within the coherent processing interval. For this problem, a jamming suppression algorithm based on fast and slow time domain joint processing is proposed under the background of Linear Frequency Modulation (LFM) coherent radar countering SMSP jamming. The time and frequency domain characteristics of SMSP are studied and the effect on coherent radar is analyzed on the condition of self screening jamming. On this basis, four processing steps are designed to suppress the SMSP jamming. Firstly, the jamming fast time location is estimated by calculating the differential entropy of slow time signal. Secondly, the real jamming parameter is found based on the maximum correlation coefficient criterion. Then the jamming signals are reconstructed using Biorthogonal Fourier Transform. Finally, the SMSP jamming is suppressed by cancellation. The simulation results show that the proposed algorithm model is highly consistent with the actual radar processing flow, and the efficiency is further verified through algorithms comparison.
Key words:SMeared SPectrum (SMSP) jamming/
Fast-slow time domain/
Joint processing/
Jamming cancellation



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