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