基于北斗导航卫星的BiSAR大场景成像  

Large Scene Imaging of BiSAR Using Bei Dou Navigation Satellite System

作　　者：范学祯 刘飞峰[1,2] 张天[1,2] 曾涛[1,2] 

机构地区：[1]北京理工大学信息与电子学院雷达技术研究所,北京100081 [2]北京理工大学嵌入式实时信息处理技术北京市重点实验室,北京100081

出　　处：《信号处理》2017年第4期546-550,共5页Journal of Signal Processing

基　　金：长江学者奖励计划(T2012122);科技北京百名领军人才培养工程(Z141101001514005)资助;国家自然科学基金(61601032;61625103;61120106004)

摘　　要：基于导航卫星的双基地合成孔径雷达系统具有低成本和易于部署等突出优势,近年来发展迅速,但受限于导航信号发射功率低,目标场景区的回波信号能量很弱,之前的实验结果中成像场景面积均较小。本文提出了一种基于多星多角度的GNSS-BiSAR大场景区域成像方法:采集多颗导航卫星在不同场景方向的回波进行成像处理,通过图像拼接获得高质量的大场景区域成像结果;开展了多星多角度GNSS-BiSAR成像实验,获得了较好的成像结果,并给出了图像解译,验证了GNSS-BiSAR系统用于遥感成像的发展潜力。Because of outstanding advantages of low in cost and deploying easily, Bistatic Synthetic Aperture Radar （BiSAR） system based on Global Navigation Satellite System （GNSS） has been developed fast for the past few years. But limited by the weak echo signal energy, it has only obtained experimental results about a little bit small imaging scene now, which is caused by the fact that navigation signal is low in transmitting power. In this paper, a large scene imaging strategy utilizing multiple navigation satellites based on GNSS-BiSAR system is presented. A high-quality and large scene image can be achieved after collecting echo signals from multiple navigation satellites in different angles and then stitching muhiple im- ages together. Furthermore, an imaging experiment based on BeiDou-2 navigation satellites was carried out and the experi- ment result attaching image interpretation is showed. The experiment result verifies that the GNSS-BiSAR system has a great development potential in remote sensing imaging application.

关 键 词：导航卫星 双基地合成孔径雷达 大场景成像 图像拼接 

分 类 号：TN95[电子电信—信号与信息处理]