摘要
通过建立实验系统并对基于调频广播照射的单站无源相干探测系统原理的研究,提出了基于通道均衡、杂波抑制和距离多普勒相干匹配滤波的信号处理方案;分析了直达波和多径杂波为整数迟延和分数迟延时的杂波抑制方法及性能,讨论了通道频率特性以及通道非线性对相消性能的影响。对实测数据的处理结果表明通过设置良好的接收方案和利用提出的处理方法,能有效地探测和跟踪远距离运动目标。
Based on a passive coherent location experimental radar system by using external FM broadcast as transmitter, this paper provides an applicable signal processing scheme, which consist of channel equalization, clutter cancellation and coherent match filtering processing. Ways of cancellation for clutter when its arrival time being integer as well as fractional sampling interval are discussed, the influence of channel frequency properties and nonlinear distortions on system performance are presented, respectively. Real date processing result shows by a deliberate system designing and employing the presented scheme, favorable performance for such a system is achievable.
出处
《电波科学学报》
EI
CSCD
北大核心
2005年第3期381-385,共5页
Chinese Journal of Radio Science
基金
国家自然科学基金(60472087)
国家部委预研基金资助课题(51407010204DZ0125)
关键词
外辐射源
直达波抑制
通道特性
目标检测
Frequency modulation
Radar clutter
Radio broadcasting
Signal processing
