多载频FMCW在MIMO雷达中的应用研究  

Study on Application of Multiple Carrier Frequency FMCW in MIMO Radar

作　　者：杨明磊[1] 陈伯孝[1] 张守宏[1] 高昭昭[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《电子学报》2008年第12期2351-2356,共6页Acta Electronica Sinica

基　　金：国家预研项目(No.51307050102);2006年教育部新世纪优秀人才支持计划项目(No.NCET-06-0856)

摘　　要：介绍多载频MIMO雷达的特点和工作原理,对多载频线性调频连续波(FMCW)信号及其回波进行了分析,并详细论述了MIMO雷达中静止目标和运动目标情况下多载频FMCW信号处理方法以及其中的一些关键问题,如通道分离滤波器的设计、距离分辨率分析、速度补偿精度分析、相参积累周期数的选取等.针对该体制雷达各发射天线间载频不同的特点,提出了采用IFFT相参合成的方法来精测目标距离,获得距离高分辨,具有运算速度快、受目标运动影响小的优点;对运动目标情况下距离多普勒的耦合问题进行了详细分析,并提出了利用相参积累进行补偿的解决方案.The characteristics and the principle of Multiple Carrier Frequency MIMO radar system are systemic introduced and the Frequency Modulated Continuous Wave （FMCW） signal and the return signal are analyzed. Then the processing of FMCW when the target is still or moving are detailed discussed as well as some key problem, e. g. the design of Channel Separation Filter （CSF）, the range resolution analysis, the precision analysis of velocity compensation and the decision of coherent integration number etc. Based on the characteristics of multiple carrier frequency, the method to employ the IFFT to coherently synthesize pulse is pro- posed to obtain High Range Resolution （HRR） and a scheme is put forward to solve the coupling of range and velocity when the target is moving and the simulation result shows that it is practical.

关 键 词：多载频FMCW MIMO雷达 综合脉冲与孔径雷达 距离高分辨 

分 类 号：TN958.5[电子电信—信号与信息处理]