多载频MIMO雷达的模糊函数  

Ambiguity functions of multiple-carrier frequency MIMO radar

作　　者：杨明磊[1] 陈伯孝[1] 齐飞林[1] 张守宏[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：《系统工程与电子技术》2009年第1期5-9,共5页Systems Engineering and Electronics

基　　金：国家预研项目(51307050102);2006年教育部新世纪优秀人才支持计划(NCET-06-0856)资助课题

摘　　要：建立了多载频MIMO(multiple-input multiple-output)雷达的发射、接收信号模型。利用匹配滤波理论并引入阵列的孔径推导出了多载频MIMO雷达的多维模糊函数,并利用MIMO雷达发射信号正交的特点进行简化。证明了在远场窄带情况下可简化为时间和空间分离的函数,推导出距离分辨率由发射信号的带宽以及天线间的带宽同时决定。以简单均匀线阵为例,仿真分析了单基地和双基地情况下多载频线形调频(LFM)信号的多维模糊函数特点和距离分辨率;对双基地雷达来说,目标位置不同距离和角度分辨率都有所变化。The transmit signal model and receive signal model of multiple-carrier frequency MIMO radars are constructed first. Then the multiple-dimensional ambiguity functions （AF） of MIMO radars with the array aperture are derived based on the theory of matched filter and are simplified Using the orthogonal characteristics between the transmit signals of MIMO radars. And the AF can be further factored into separable space and time components when the target appears in the far-field of the array and the waveforms are considered as narrowband. The range resolution is commonly decided by the bandwidth of the transmit signal and the bandwidth among the transmit antennas simultaneously. Take an uniform linear array （ULA） as an example, the characteristics of AF and the resolution of LFM signal using multiple carrier frequency are analyzed in the case of monostatic and bistatic radars. And the range and azimuth resolution change with the difference of the target＇s position for a bistatic MIMO radar.

关 键 词：多载频 MIMO雷达 模糊函数 综合脉冲与孔径雷达 双基地雷达 

分 类 号：TN958.5[电子电信—信号与信息处理]