| 基于加速度分析的星载SAR-GMTI运动目标参数估计 |
| |
| 引用本文： | 夏猛,杨小牛.基于加速度分析的星载SAR-GMTI运动目标参数估计[J].宇航学报,2011,32(7). |
| |
| 作者姓名： | 夏猛 杨小牛 |
| |
| 作者单位： | 1. 西安电子科技大学通信工程学院,西安,710071
2. 通信系统信息控制技术国家重点实验室,嘉兴,314003 |
| |
| 摘 要： | 针对具有加速度的地面快速运动目标对合成孔径雷达成像和参数估计带来的影响,提出了一种基于重聚焦的三通道运动目标检测方法.通过分析包含加速度的运动目标回波模型,使用广义二阶Keystone变换对杂波抑制后的通道数据进行距离弯曲校正,时频分析构造二次相位补偿函数校正剩余距离走动,并结合方位向傅立叶变换对运动目标进行聚焦成像.最后采用干涉处理技术求解运动目标参数矢量,完成目标的定位.仿真结果验证了该运动目标参数估计方法的有效性.
|
| 关 键 词： | 合成孔径雷达 运动目标检测 参数估计 Keystone变换 |
Moving Target Parameter Estimation of Spaceborne SAR-GMTI Based on the Analysis of Acceleration |
| |
| XIA Meng,YANG Xiao-niu.Moving Target Parameter Estimation of Spaceborne SAR-GMTI Based on the Analysis of Acceleration[J].Journal of Astronautics,2011,32(7). |
| |
| Authors: | XIA Meng YANG Xiao-niu |
| |
| Institution: | XIA Meng1,YANG Xiao-niu2 (1.School of Communication Engineering,Xidian University,Xi'an 710071,China,2.National Key Laboratory of Information Control Technology for Communication System,Jiaxing 314003,China) |
| |
| Abstract: | Aiming at the influence of fast moving target with acceleration on imaging and parameter estimation,a novel method for moving target detection with three-channel is proposed based on refocusing image.After the moving target echo is analyzed,the general two-order keystone transform is used to correct range curve for clutter suppression result.Time-frequency analysis is employed to construct phase compensation function and to correct the residual range walk.Finally azimuth Fourier transform is performed to ge... |
| |
| Keywords: | Synthetic aperture radar Moving target detection Parameter estimation Keystone transform |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
