| 基于多路群时延的星载DBF实时处理方法 |
| |
| 引用本文： | 尉启,胡家洛,毕辉,徐伟,黄平平,谭维贤. 基于多路群时延的星载DBF实时处理方法[J]. 信号处理, 2022, 38(3): 562-570. DOI: 10.16798/j.issn.1003-0530.2022.03.014 |
| |
| 作者姓名： | 尉启 胡家洛 毕辉 徐伟 黄平平 谭维贤 |
| |
| 作者单位： | 1.内蒙古工业大学信息工程学院，内蒙古 呼和浩特 010080 |
| |
| 基金项目： | 国家自然基金项目62071258雷达成像与微波光子技术教育部重点实验室开放基金课题XCA1902903内蒙古自治区自然基金项目2020ZD18 |
| |
| 摘 要： | 距离向多通道数字波束形成(digital beamforming,DBF)技术可以显著提高星载高分辨率宽测绘带合成孔径雷达(high-resolution wide-swath synthetic aperture radar,HRWS-SAR)的系统性能,但在高分辨宽测绘带的情况下,传统DBF处理方法难以避免脉冲扩展...
|
| 关 键 词： | 数字波束形成 高分辨率宽测绘带 多通道 扫描接收 合成孔径雷达 |
| 收稿时间： | 2021-05-31 |
Spaceborne Real Time DBF Processing Based on Multi-group Time Delayers |
| |
| Affiliation: | 1.College of Information Engineering，Inner Mongolia University of Technology，Hohhot，Inner Mongolia 010080，China2.Key Laboratory of Radar Imaging and Microwave Photonics （Nanjing University of Aeronautics and Astronautics），Ministry of Education，Nanjing，Jiangsu 211106，China3.Inner Mongolia Key Laboratory of Radar Technology and Application，Hohhot，Inner Mongolia 010051，China |
| |
| Abstract: | Digital beamforming （DBF） with multiple channels in elevation can obviously improve system performances of spaceborne high-resolution wide-swath synthetic aperture radar （HRWS SAR）. However， in the high resolution wide swath imaging mode， it is difficult to relieve the influence of pulse extension loss （PEL） for the conventional DBF processor， which leads to the performance deterioration. In this paper， according to the geometric model of spaceborne DBF Scan-On-Receive （SCORE）， the reason why targets far from the swath center are severely influenced by the PEL is analyzed. To solve this problem， a spaceborne real time DBF processing method based on multi-group time delayers is proposed. The time delayers in the conventional DBF processor are replaced by the multi-group time delayers to improve the system performances. Compared with the conventional DBF processor， the multi-group time delayers could provide more accurate time delay for all targets in the wide imaged swath， signals from all elevation channels can be better coherently combined， and the influence of PEL can be greatly relieved. Simulation results on point targets validate the proposed DBF processing method. |
| |
| Keywords: | |
|
| 点击此处可从《信号处理》浏览原始摘要信息 |
|
点击此处可从《信号处理》下载免费的PDF全文 |
