基于新型阵列配置的机载MIMO-SAR下视三维成像性能研究  

Airborne downward-looking MIMO 3D-SAR imaging properties based on the new array configuration

作　　者：于春艳[1] 谢亚楠[1] 赵海兰[1] 张瑞[1] 王佳佳[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072

出　　处：《电子测量技术》2014年第2期64-69,共6页Electronic Measurement Technology

摘　　要：阵列天线机载MIMO-SAR三维成像技术是获得SAR三维高分辨率图像的重要方式之一。通过研究跨行向阵列天线收发单元的配置问题,提出了一种新型的机载MIMO-SAR阵列天线配置方法。分析了机载MIMO-SAR下视三维成像的成像几何、等效相位中心误差和三维SAR回波信号模型。通过等效后的天线方向图证明了该阵列配置方法可以获得良好的指向性,通过一种下视三维成像算法进行仿真,证明了该新型阵列配置的机载MIMO-SAR三维成像模型能够获得更好的成像性能。Three dimensional SAR imaging technology based on linear array is one of the most important methods to get the three dimensional SAR high resolution image.In this paper,A new type of airborne MIMO-SAR array antenna configuration is proposed by studying on transmitting and receiving antenna elements that are placed to form crosstrack.This paper analyzes the imaging geometry,effective phase center error and three dimensional echo signal model of MIMO-SAR.Finally,the emulation experiments show that this new type of airborne MIMO-SAR array antenna configuration can achieve a better imaging performance by the airborne downward-looking imaging algorithm.

关 键 词：MIMO SAR成像 天线配置 等效相位中心 

分 类 号：TP722.6[自动化与计算机技术—检测技术与自动化装置]