摘要
借鉴正交信号多输入多输出(MIMO)雷达的思想,利用多个照射源信号进行目标探测与定位,可显著改善无源雷达的系统性能。以调频广播信号无源雷达为背景,研究了多照射源条件下的雷达信号模型及相参合成原理,分析了各信号间的相位关系和影响信号相参合成的各种因素。结果表明:只要能有效消除各信号间的差异相位项,实现多照射源信号相参合成、改善无源雷达检测信噪比是切实可行的。
It is valid to improve the system performance of passive radar by utilizing multiple illuminators for detection and position, drawing on the idea of orthogonal signal Multiple-input Multiple-output（MIMO） radar. Aimed at the passive radar based on FM broadcasting signal, this paper researches the signal model and the principle of coherent synthesis based on multiple FM radio channels, analyzes the phase relation of each signal, and gives the phase items that influence coherent synthesis. The study shows it is feasible to realize coherent synthesis of signals from multiple illuminators and improve the signal-noise-ratio （SNR） of passive radar systems, by removing the differentia phase item of each signal.
出处
《电波科学学报》
EI
CSCD
北大核心
2011年第4期802-806,824,共5页
Chinese Journal of Radio Science
基金
电子信息控制重点实验室项目资助(20090102)
中央高校基本科研业务费专项资金资助(2009J015)
