用于机载线阵三维SAR成像的MIMO阵列构型设计  

MIMO Array Design for Airborne Linear Array 3D SAR Imaging

作　　者：吴子斌[1] 朱宇涛[1] 粟毅[1] 李禹[1] 宋晓骥[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《电子与信息学报》2013年第11期2672-2677,共6页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61171135)资助课题

摘　　要：机载线阵3维SAR成像技术在军事和民用方面都有着广泛应用,是当前雷达成像领域的研究热点。其切航迹向分辨率是利用机翼上的线阵所获取,阵列分布直接影响到成像性能。受机翼体积的限制,机载线阵3维SAR系统的阵元数有限,可以采用MIMO技术来获取更多的目标信息,提高切航迹向的空间采样能力。该文研究了机载线阵3维SAR系统的阵列设计问题,即以空间卷积原理为基础,归纳出卷积逆运算的规律,从而通过卷积逆运算求解出多组MIMO线阵设计方案,并从机载线阵3维SAR成像的需求出发,分析了各组设计方案的优缺点,为实际构建机载线阵3维SAR成像系统提供了技术支撑。Airborne linear array 3D SAR imaging technique is a research focus in the field of radar imaging, and has broad applications in military and civilian. It utilizes a linear antenna array on the wings to obtain an expected resolution in cross track direction. And imaging performance would be influenced by the array configuration directly. As the wings can not be long enough to carry many T/R elements, it is valid to acquire good imaging performance via MIMO radar array. In this paper, array design issue of airborne linear array 3D SAR system is investigated. Based on the spatial convolution principle, the operation law of inversed convolution is summed up. Multiple design methods of linear MIMO array for 3D SAR imaging system are proposed through inversed convolution operation. Then the advantages and disadvantages of each design method are analyzed in the view of imaging properties. The investigation can provide technical support to construction of airborne linear array 3D SAR imaging system.

关 键 词：合成孔径雷达 MIMO 3维成像 线阵 阵列设计 

分 类 号：TN957.52[电子电信—信号与信息处理]