非合作星机双基地SAR的回波检测方法研究  

Research on Echo Detection Method of Non-cooperative Hybrid Bistatic SAR

作　　者：孙文磊 顾荣军[1] 王永海[1] 周志增[1] SUN Wenlei;GU Rongjun;WANG Yonghai;ZHOU Zhizeng(PLA 63889 Troops,Mengzhou 454750,China)

机构地区：[1]中国人民解放军63889部队,河南孟州454750

出　　处：《现代防御技术》2025年第1期140-146,共7页Modern Defence Technology

摘　　要：场景回波实时检测是非合作星机双基地SAR波束同步的前提。针对双基地SAR微弱场景回波的距离走动以及场景能量分散问题,通过场景散射特性和回波模型的分析,提出一种频域M/N检测方法,其利用相邻PRF场景的相关性,实现场景能量的聚集,且频谱能量积累不受距离走动影响。仿真和实测数据验证结果表明,提出的算法检测概率高,性能优于常规检测算法,抗干扰性能强,计算量小,实时性好,易于工程实现。The real-time detection of scene echoes is a prerequisite for beam synchronization in spaceborne/airborne hybrid bistatic synthetic aperture radar(SAR).To address the issues of weak scene echoes,range migration,and energy dispersion in hybrid bistatic SAR,a frequency-domain M/N detection method based on the analysis of scene scattering characteristics and echo models is proposed.The method leverages the correlation of adjacent PRF scenes to aggregate scene energy,effectively mitigating the impact of range migration.Simulation and experimental results demonstrate that the proposed algorithm achieves a high detection probability and superior performance compared to conventional detection algorithms.In addition,it offers strong resilience to jamming,low computational complexity,and is suitable for real-time implementation,making it practical for engineering applications.

关 键 词：星机双基地SAR 非合作SAR 回波检测 频域检测 M/N检测 

分 类 号：TN958[电子电信—信号与信息处理]