一维镜像综合孔径辐射成像方法及空间分辨率  

Radiometric imaging with one-dimensional mirrored interferometric aperture synthesis and its spatial resolution

作　　者：陈良兵[1] 李青侠[1] 朱耀庭[1] 

机构地区：[1]华中科技大学电子与信息工程系,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2010年第7期86-90,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(40906089)

摘　　要：针对传统大型综合孔径辐射计系统复杂度较高的问题,提出了一维镜像综合孔径辐射成像方法,建立了该方法的系统模型,在此基础上阐述了该方法的成像原理,利用多次联合测量解决了一维镜像综合孔径中的基线缺失以及方程组欠定性问题,推导了一维镜像综合孔径的阵列因子并给出了空间分辨率的解析表达式,通过仿真证实了该成像方法的可行性以及在分辨率方面的优越性.Because a large aperture synthesis system would involve a lot of antennas and correlators,the system and its calibration are very complicated. Thus one-dimensional mirrored interferometric aperture synthesis is proposed,which can provide the same spatial resolution with a large traditional aperture synthesis system but needs fewer antennas. Firstly,the system model for it is established,and based on it,the imaging principle is presented. Then combining several measurements is discussed how to solve the problems of baseline missing and linear equations underdetermination associated with mirrored interferometric aperture synthesis. The analytic expressions for the array factor and the spatial resolution are presented. Finally,simulation experiments are conducted,and the results demonstrate the feasibility of one-dimensional mirrored aperture synthesis imaging and the superiority in the spatial resolution.

关 键 词：辐射成像 镜像综合孔径 余弦可见度 余弦变换 空间分辨率 

分 类 号：TP722.6[自动化与计算机技术—检测技术与自动化装置]