机载SAR受空/地转发干扰识别特征研究  

Research on recognition features of repeater jamming airborne SAR suffers from air or ground

作　　者：李文哲[1,2] 李德煦 王志浩 李开明 LI Wenzhe;LI Dexu;WANG Zhihao;LI Kaiming(Air Force Engineering University,Xi’an 710077,China;No.93107 Unit,the PLA,Shenyang 110141,China;No.93363 Unit,the PLA,Shenyang 110141,China;Collaborative Innovation Center of Information Sensing and Understanding,Xi’an 710077,China)

机构地区：[1]空军工程大学,西安710077 [2]93107部队,沈阳110141 [3]93363部队,沈阳110141 [4]信息感知技术协同创新中心,西安710077

出　　处：《空天预警研究学报》2024年第5期318-323,共6页JOURNAL OF AIR & SPACE EARLY WARNING RESEARCH

基　　金：国家自然科学基金项目(62371468)。

摘　　要：鉴于当前还未有关于合成孔径雷达(SAR)受到空中机动平台产生的间歇采样转发干扰问题的相关研究,针对机载SAR受到来自空中机动/地面固定两类平台的间歇采样转发干扰的识别特征进行研究.首先推导了两类转发干扰的信号模型,从理论上对两类转发干扰的识别特征进行多域联合分析;然后采用基于WVD分布的时频分析方法和基于ω-K的SAR成像算法,从受干扰信号的时域、频域、时频域和图像域等四个维度对两种干扰样式进行了仿真和分析.仿真结果验证了理论分析的正确性,从而为机载SAR遭遇转发干扰时的样式识别提供了可靠的分析思路和识别依据,并进一步给出针对两类转发干扰的反制策略.In view of the lack of relevant research on intermittent sampling repeater jamming that SAR suffers from aerial maneuvering platforms,this paper makes studies on the recognition features of intermittent sampling repeater jamming that airborne SAR suffers from the two types of ground fixed and aerial maneuvering platforms.Firstly,the signal model of the two types of repeater jamming is derived,and a multi-domain joint analysis is conducted theoretically on recognition features of the two types of repeater jamming.And then,the time-frequency analysis method based on WVD distribution and the SAR imaging algorithm based onω-K are used to simulate and analyze the two jamming patterns from four dimensions of the disturbed signals:time domain,frequency domain,time-frequency domain and image domain.The simulation results verify the correctness of the theoretical analysis,thus providing a reliable analysis idea and recognition basis for the pattern recognition when airborne SAR is subjected to repeater jamming.The paper further gives countermeasures against the two types of repeater jamming.

关 键 词：合成孔径雷达 间歇采样转发干扰 干扰识别特征 多域联合分析 

分 类 号：TN974[电子电信—信号与信息处理]