双波段复合导引头联合检测策略  

Joint Detecting Strategies of Dual-Band Composite Seeker

作　　者：王卓 郑学合 常晓兰 WANG Zhuo;ZHENG Xue-he;CHANG Xiao-lan(Beijing Institute of Remote Sensing Equipment,Beijing 100854,China;The Second Research Academy of CASIC,Beijing 100854,China)

机构地区：[1]北京遥感设备研究所,北京100854 [2]中国航天科工集团有限公司第二研究院,北京100854

出　　处：《现代防御技术》2019年第6期119-125,共7页Modern Defence Technology

摘　　要：双波段复合雷达主动导引头可以在2个波段对同一空袭目标进行独立探测。双波段各自回波信号之间的强相关性以及接收机热噪声的独立性使得复合导引头可以利用2个波段的回波信号进行联合检测。联合检测中,通过调整2个独立探测单元各自的虚警概率与检测概率,复合导引头可以在满足系统参数要求的前提下一定程度降低检测信噪比门限,从而达到提升导引头探测威力的效果。通过理论分析以及仿真计算,当双波段各自的独立探测距离满足一定条件时,选择合理的联合检测策略并且匹配适当的检测信噪比门限可以将复合导引头的灵敏度提升2 dB左右。Dual-band composite radar active seeker can detect a target respectively within two bands at the same time. The strong correlation between echo signals of dual bands and the independence of the receiver noise make it possible that composite seeker does a joint detection using echo signals of both bands. During the joint detection,composite seeker can reduce the intercept signal to noise ratio(SNR)threshold to achieve more range by adjusting the false alarm probability and detection probability of the two independent detecting units. Through theoretical analysis and simulation calculation,when respective ranges of two bands meet certain condition reasonable detecting strategy and suited intercept SNR threshold can improve the composite seeker sensitivity about 2 dB.

关 键 词：双波段复合导引头 联合检测 检测信噪比门限 虚警概率 检测概率 灵敏度 

分 类 号：TN953[电子电信—信号与信息处理] TJ765.3[电子电信—信息与通信工程]