多子带并发的MIMO-SAR高分辨大测绘带成像  

Image Formation of Wide-Swath High Resolution MIMO-SAR

作　　者：井伟[1] 武其松[1] 邢孟道[1] 保铮[1] 

机构地区：[1]西安电子科技大学雷达信号处理重点实验室,西安710071

出　　处：《系统仿真学报》2008年第16期4373-4378,共6页Journal of System Simulation

基　　金：自然科学基金(60502044);教育部重点项目(20051009).

摘　　要：提出多子带并发的多发多收(MIMO)SAR成像方法,在扩大测绘带宽度的同时实现高分辨成像。首先采用低的脉冲重复频率保证大测绘带距离不模糊,然后利用每一个子带对应的多颗接收卫星的空间信息对该子带回波信号进行空域滤波解多普勒模糊,再对解过模糊的各子带信号进行频带合成实现距离高分辨。该方法可以有效利用多颗卫星的空间自由度。仿真实验验证了该方法的有效性。A novel image formation method using Multiple-Input Multiple-output （MIMO） S.4R system was proposed, The system transmitted multiple sub-bands signals synchronously. Firstly, low PRF （Pulse Repetition Frequency） was adopted to get unambiguous wide-swath. Then the method used space filters to remove azimuth ambiguities with information of multiple satellites. Finally, sub-bands were combined into a whole band to obtain high range resolution. This processing could fully utilize the freedom degree of the satellites. The advantage of the method is presented along with simulation examples.

关 键 词：合成孔径雷达 雷达成像 多发多收系统 高分辨大测绘带成像 模糊 合成带宽 

分 类 号：TN958[电子电信—信号与信息处理]