利用目标模拟器产生SAR场景目标回波方法  

Method of SAR Surface Target Echo Generation Applying Target Simulator

作　　者：何东元[1] 辛培泉[1] 费君[1] 徐辉[1] 

机构地区：[1]南京电子技术研究所,南京210013

出　　处：《中国电子科学研究院学报》2007年第1期66-69,共4页Journal of China Academy of Electronics and Information Technology

摘　　要：介绍了一种利用目标模拟器产生合成孔径雷达(SAR)场景目标回波的方法。给定一幅原始灰度图像,依据一定算法生成基带I、Q数据并写入目标模拟器的FLASH存储区间,目标模拟器生成基带波形进而上变频到射频(RF)频段,模拟产生SAR的回波信号进入雷达接收机,经A/D变换后采用合适的算法成像。比较雷达成像和原始图像的质量可以直观、定性地评价雷达系统性能。类似于场景目标处理方法,点目标成像可以定量分析雷达系统性能。This paper introduces a method of SAR surface target echo generation applying target simulator. First, we can generate I/Q data of baseband based on a original gray image and write these data into flash memory of target simulator. Then the target simulator generates waveform of baseband and converts the waveform to RF in frequency domain. Simulated SAR echo enters the SAR receiver and passes through the A/D converter. We can obtain the SAR image if we adopt appropriate mapping algorithm and, comparing the SAR image with the original one, we can evaluate the SAR performance directly and qualitatively. Similar to the method of surface target procession, we can get the image of a point target and evaluate the SAR performance quantitatively.

关 键 词：SAR 目标模拟器 场景目标 点目标 

分 类 号：TN957.52[电子电信—信号与信息处理]