多通道ScanSAR成像仿真研究  

Research on Multi-channel ScanSAR Imaging Simulation

作　　者：梁波[1] 武昕伟[1] 蒋一[1] 

机构地区：[1]解放军炮兵学院,安徽合肥230031

出　　处：《电子质量》2010年第5期6-9,共4页Electronics Quality

摘　　要：多通道雷达系统能够克服传统合成孔径雷达(SAR)的局限。其中一个应用是在偏置相位中心方位向多波束模式(DPCMAB)中利用方位向多孔径SAR信号重构,有效实现了高分辨率宽测绘带成像。下一步的研究重点是高方位分辨率超宽测绘带成像。基于此,文章探讨在ScanSAR模式下的多通道SAR系统,分析多孔径重构结合ScanSAR模式出现的问题,通过多通道频域重构算法结合burst模式下的RD算法实现了多通道ScanSAR[1]成像。仿真中所设计的系统够实现在几何分辨率4.95m下测绘带宽达到350km以上。Multi-channel radar systems allow for overcoming the inherent limitation of conventional Synthetic Aperture Radar. One of the applications is using multi-aperture SAR signal reconstruction in azimuth for the Displaced Phase Center Multiple Azimuth Beam mode which enables high-resolution wide- swath imaging. As a next step, focus is turned to advanced concepts for the imaging of even wider swaths with high azimuth resolution. In this regard, the paper investigates the operation of multi-channel SAR systems in ScanSAR mode and analyses aspects of applying the mul-ti-aperture reconstruction in combination with burst mode operation. It achieves the multi-channel ScanSAR Imaging by combining multi- channel frequency domain algorithm with RD algorithm for burst operation mode. The system de-signed in the simulation enables the imaging of a 350km wide swath with a geometric resolution of 4.95m.

关 键 词：SAR 多通道非均匀采样重构 SCANSAR 多通道ScanSAR 

分 类 号：TN955[电子电信—信号与信息处理]