机载雷达微弱目标帧间非相参积累与检测技术  

Airborne Radar Weak Target Interframe Noncoherent Integration and Detection Method

作　　者：王宁[1,2] 孟晋丽[1,2] 刘国庆[1,2] 杨予昊 孙俊 WANG Ning;MENG Jinli;LIU Guoqing;YANG Yuhao;SUN Jun(Nanjing Research Institute of Electronics Technology,Nanjing,Jiangsu 210039,China;Key Laboratory of Intellisense Technology,CETC,Nanjing,Jiangsu 210039,China)

机构地区：[1]南京电子技术研究所,江苏南京210039 [2]中国电子科技集团公司智能感知技术重点实验室,江苏南京210039

出　　处：《信号处理》2021年第2期248-257,共10页Journal of Signal Processing

基　　金：国家自然科学基金(U19B2031)。

摘　　要：微弱目标探测一直是机载雷达,尤其是机载预警雷达面临的重要挑战。针对这一问题提出一种目标帧间非相参积累和检测方法。首先,建立了机载雷达多帧信号采用不同载频和脉冲重复周期场景下的回波信号模型。其次,提出了一种运动目标帧间多普勒校正和距离单元走动补偿方法,使得经过处理后的目标在不同帧数据中位于相同待检测单元。然后,为了避免强目标解距离模糊引入的虚假目标,进行强目标检测和剔除。最后,利用距离周期扩展方法解距离模糊,并进行帧间非相参积累。经过提出方法处理后,微弱目标的检测性能得到提升。利用仿真试验验证了提出方法的有效性。Weak target detection has always been an important challenge for airborne radar, especially for airborne early warning radar. A target interframe noncoherent integration and detection method is proposed in this paper. Firstly, the airborne radar signal model when multiple frames using different carried frequency and pulse repetition interval is build. Secondly, a method of the moving target Doppler correction and the range migration compensation is proposed, which makes the target after processing between different frames in the same cell to be detected. Then, to avoid the false targets introduced by resolving the range ambiguity of strong target, the detection and deletion of strong targets is applied.Finally,range cycle expansion is used to resolve range ambiguity, and interframe noncoherent integration is applied. After processing by the proposed method, the detection performance for weak target is improved. Simulation result is given to prove the effectiveness of the proposed algorithm.

关 键 词：机载雷达目标检测 距离解模糊 检测前跟踪 帧间非相参积累 

分 类 号：TN957.51[电子电信—信号与信息处理]