基于脉冲捷变机载SAR高分辨宽测绘带成像系统设计  

Designing of high-resolution and wide swath airborne SAR imaging system based on pulse agility

作　　者：刘浩[1] 吕杨 郭静超[1] 李川[1] LIU Hao;LYU Yang;GUO Jingcao;LI Chuan(No.38 Research Institute,China Electronics Technology Group Corporation,Hefei 230088,China)

机构地区：[1]中国电子科技集团公司第三十八研究所,合肥230088

出　　处：《空军预警学院学报》2021年第6期391-394,共4页Journal of Air Force Early Warning Academy

基　　金：国家自然科学基金联合基金项目(No.U20B2068)。

摘　　要：针对机载相控阵体制合成孔径雷达成像幅宽较窄的问题,根据高分辨宽测绘带成像的需求,提出了一种基于脉冲级捷变的宽幅成像控制方法.该方法通过脉间切换俯仰向波束指向,实现对多个测绘子带的回波数据采集,并分别进行成像处理,利用子带图像间的交叠区域进行子带图像拼接处理,从而在获得宽幅图像的同时,又保证了成像分辨率.实验结果表明,本文方法处理的图像可无缝拼接,实现了机载合成孔径雷达(SAR)大幅宽高分辨率的需求.In order to solve the problem of the narrow imaging width of airborne phased array SAR, this paper accords to the requirements of high-resolution wide-swath imaging to propose a wide imaging control method based on pulse-level agility. This method switches pitch beam directions between pulses to realize the collection of echo data of multiple surveying and mapping sub-swaths, and perform imaging processing separately, and then uses the overlapping region between sub-swath images for stitching the sub-swath images, so as to obtain wide images and simultaneously ensure the imaging resolution. The experimental results show that images processed by the proposed method can be stitched seamlessly, which meets the requirements of wide range and high resolution of airborne SAR radar.

关 键 词：合成孔径雷达 宽测绘带 脉间捷变 图像拼接 

分 类 号：TN959.7[电子电信—信号与信息处理]