摘要
箔条质心干扰是反舰导弹末制导跟踪阶段面临的主要无源干扰样式,对箔条干扰进行检测可以为抗箔条干扰的策略使用提供时机参考。该文在将舰船目标和箔条干扰分别建模为Swerling IV型和Swerling II型目标的基础上,建立单脉冲雷达导引头接收机回波信号模型,通过理论分析和对比,箔条质心干扰条件下的单脉冲雷达导引头接收机输出信号可以近似为高斯分布,采用广义似然比检验方法实现了波束内不可分辨的箔条干扰检测。综合考虑虚警概率,脉冲积累数、目标到达方向、目标与干扰的功率比等因素进行了仿真实验,结果表明该检测算法是有效的。
Chaff centroid jamming is one of the major passive jamming techniques against anti-ship missile in the terminal guidance phase, and its detection can help choose one＇s occasion to perform countermeasures. Echoes in monopulse radar seeker receiver were generated by modeling ship and chaff as swerling IV and swerling II, respectively. It was showed by theoretical analysis and comparison that echoes under centroid jamming were with the approximated Gaussian distribution, and on this foundation a general- ized likelihood ratio test （GLRT） algorithm was proposed for centroid jamming detection in beamwidth. This detection algorithm was validated by simulation, which had taken into the consideration of several important factors, as false alarm probability, pulse accumulation number, direction-of-arrival and signal-to-jamming power ratio, and their impact upon detection performance were also examined.
出处
《现代雷达》
CSCD
北大核心
2011年第11期40-44,48,共6页
Modern Radar
基金
国家自然科学基金资助项目(61072119)
关键词
单脉冲雷达导引头
箔条
质心干扰
检测
高斯分布
monopulse radar seeker
chaff
centroid jamming
detection
gaussian distribution
作者简介
通信作者：来庆福Email：laiqingfu@yahoo．com．cn来庆福 男，1979年生，博士生。研究方向为雷达电子战。多源信息融合。
