子空间信号失配下的加权自适应检测器  

A weighted adaptive detector for mismatched subspace signal detection

作　　者：林志凯 刘维建[1] 钱李昌[2] 李槟槟 周必雷 张昭建 陈浩[1] LIN Zhikai;LIU Weijian;QIAN Lichang;LI Binbin;ZHOU Bilei;ZHANG Zhaojian;CHEN Hao(Air Force Early Warning Academy,Wuhan 430019,China;Unit 31511 of the PLA,Beijing 100144,China)

机构地区：[1]空军预警学院,湖北武汉430019 [2]中国人民解放军31511部队,北京100144

出　　处：《系统工程与电子技术》2023年第7期1974-1980,共7页Systems Engineering and Electronics

基　　金：国家自然科学基金(62071482)资助课题。

摘　　要：对于多通道雷达系统,通常存在阵元误差及旁瓣干扰,此时雷达系统假定的目标导向矢量与真实值不同,从而导致信号失配。针对子空间模型下的失配信号检测问题,提出了一种具有恒虚警特性的加权自适应检测器,得到了检测器解析的检测概率和虚警概率计算表达式。根据系统需要,通过调整加权系数,所提出的检测器能够实现对失配信号的灵活检测。此外,对无信号失配的检测环境,在合适的权系数下,所提出的检测器能够提供比现有检测器更高的检测概率。For the multichannel radar system,array error and sidelobe interference often lead to signal mismatch,that is,the real steering vector of the target is different from the assumed value of the radar system.To solve the problem of mismatch signal detection with subspace model,a weighted adaptive detector with constant false alarm rate characteristics is proposed.Meanwhile,the analytical expressions of probabilities of detection and false alarm are derived.According to the needs of the system,the proposed detector can detect the mismatch signal flexibly by adjusting the weighted coefficient.In addition,for the detection problem without signal mismatch,the proposed detector,with an appropriate weight coefficient,can provide a higher probability detection than the existing detectors.

关 键 词：信号失配 自适应检测 子空间信号 恒虚警 

分 类 号：TN957.51[电子电信—信号与信息处理]