混合双基地雷达系统结构对方位估计性能的影响  

Effect of the hybrid bistatic radar configuration on direction finding performance

作　　者：刘志国[1] 廖桂生[1] 王亚利[2] 

机构地区：[1]西安电子科技大学雷达信号处理重点实验室,陕西西安710071 [2]空军工程大学理学院,陕西西安710051

出　　处：《西安电子科技大学学报》2010年第5期808-812,861,共6页Journal of Xidian University

基　　金：国家杰出青年科学基金资助项目(60825104);国家自然科学基金资助项目(60736009)

摘　　要：建立了兼具传统相控阵雷达和多输入多输出(MIMO)雷达特点的混合双基地雷达系统结构,综合考虑传统相控阵的相干处理增益和MIMO雷达的空间分集增益对目标方位估计性能的影响.给出接收角(AOA)和发射角(AOD)估计的CRB,通过对不同结构下系统CRB的分析来判断估计性能的优劣.分析表明:估计AOA时,接收端采用相控阵结构,发射端采用混合结构,可以提高估计性能;发射端采用相控阵结构而接收端采用尽可能多的接收阵列,可以获得较好的估计性能.在实际应用中,需要折中考虑不同结构中相干处理增益和空间分集增益对系统估计性能的影响.A hybrid bistatic radar configuration which constitutes the conventional phased array radar and MIMO radar configuration is proposed.The new configuration could take advantage of both the coherent processing gain provided by the conventional phased array radar and the spatial gain received from the MIMO radar.The average Cramer-Rao bound（ACRB） of the estimation is evaluated to assess the estimation performance for both the angle of departure and the angle of arrival.By measuring the average CRB,the direction finding performances of different configurations are investigated.It is concluded that a system with the phased array configuration at the receiver and the hybrid configuration at the transmitter could provide a better AOA estimation performance,while a system with the phased array configuration at the transmitter and more antenna arrays at the receiver could increase the AOD estimation accuracy.The effects of both the coherent processing gain and the spatial gain acquired from different configurations should be considered eclectically in application.

关 键 词：阵列信号处理 MIMO雷达 方位估计 检测 平均CRB 

分 类 号：TN957.51[电子电信—信号与信息处理]