频率捷变雷达的扩展目标检测  

Distributed target detection for frequency agile radars

作　　者：刘祥 黄天耀 刘一民[1] LIU Xiang;HUANG Tianyao;LIU Yimin(Department of Electronic Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《系统工程与电子技术》2022年第6期1833-1838,共6页Systems Engineering and Electronics

基　　金：国家自然科学基金(61801258)资助课题。

摘　　要：本文研究频率捷变雷达的扩展目标检测问题。当频率捷变雷达的合成带宽较大时,雷达目标会变成扩展目标,导致雷达无法直接应用传统的恒虚警检测算法。针对这一问题,本文建立了频率捷变雷达的扩展目标检测模型,推导了基于广义似然比的检验统计量,并且通过数值仿真展示了相应的检测概率和虚警概率。为了提升雷达的抗干扰能力和频谱利用率,本文考虑了雷达只使用一部分发射频点的场景。数值结果表明,在高信噪比下,频率捷变雷达使用的发射频点越多、合成带宽越大时,扩展目标检测的性能越好。This paper studies distributed target detection for frequency agile radars.When the synthetic bandwidth of frequency agile radars is large,radar targets become distributed targets,and thus the traditional constant false alarm rate detection methods fail.To deal with this problem,we formulate a distributed target detection model for frequency agile radars,derive the generalized likelihood ratio test statistic,and show the corresponding false alarm and detection rate by simulations.To improve the anti-jamming ability and the spectrum utilization efficiency of frequency agile radars,we consider the scenario in which only parts of the frequency points are transmitted.Numerical results reveal that under high signal-to-noise ratio,the distributed target detection performance improves as the synthetic bandwidth increases,namely more frequency points are transmitted.

关 键 词：频率捷变雷达 扩展目标检测 广义似然比 合成带宽 

分 类 号：TN958.6[电子电信—信号与信息处理]