| 一种改进的大斜视小孔径SAR距离多普勒成像法 |
| |
| 引用本文： | 王淑艳,苏志刚,吴仁彪.一种改进的大斜视小孔径SAR距离多普勒成像法[J].现代雷达,2011,33(9). |
| |
| 作者姓名： | 王淑艳 苏志刚 吴仁彪 |
| |
| 作者单位： | 中国民航大学基础实验中心,天津,300300 |
| |
| 基金项目： | 国家自然科学基金资助项目(60872110); 中央高校基本科研基金资助项目(ZXH2009C007) |
| |
| 摘 要： | 首先,分析了大斜视下小孔径SAR回波距离徙动的特点,其距离走动的影响远大于距离弯曲,可忽略距离弯曲和距离展开的高次项；然后,提出一种基于Keystone变换和秩亏Capon法改进的距离多普勒成像法.利用Keystone变换进行距离走动校正,可避开斜视角精确测试的难题.针对较少的方位向采样数据,利用非对角加载的秩亏Capon法进行方位脉压,可提高方位分辨率,获得高效的SAR成像.
|
| 关 键 词： | 大斜视小孔径SAR Keystone变换 秩亏Capon法 距离多普勒成像 |
A Modified RD Imaging Method Using the Keystone Transform and Rank-deficient Capon for High Squint SAR |
| |
| WANG Shu-yan,SU Zhi-gang,WU Ren-biao.A Modified RD Imaging Method Using the Keystone Transform and Rank-deficient Capon for High Squint SAR[J].Modern Radar,2011,33(9). |
| |
| Authors: | WANG Shu-yan SU Zhi-gang WU Ren-biao |
| |
| Affiliation: | WANG Shu-yan,SU Zhi-gang,WU Ren-biao(Key Lab for Advanced Signal Processing,Civil Aviation University of China,Tianjin 300300,China) |
| |
| Abstract: | In this paper,a modified range-Doppler(RD) algorithm with the Keystone Transform and the rank-deficient Capon is proposed for the shorter synthetic aperture radar(SAR) imaging in the high squint mode.With the decrease of the aperture time under the squint mode,the linear range-walk becomes the dominant part of the range migration.The keystone transform is well suitable for removal of the range walk.In order to achieve higher resolution in the azimuth domain with the shorter SAR,the rank-deficient Capon whic... |
| |
| Keywords: | high squint SAR Keystone transform rank-deficient Capon RD algorithm |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
