| 基于分数阶Fourier变换的机载SAR运动目标检测 |
| |
| 引用本文： | 孙泓波,顾红,苏卫民,刘国岁.基于分数阶Fourier变换的机载SAR运动目标检测[J].电子与信息学报,2002,24(8):1060-1065. |
| |
| 作者姓名： | 孙泓波 顾红 苏卫民 刘国岁 |
| |
| 作者单位： | 南京理工大学电子工程技术研究中心,南京,210094 |
| |
| 基金项目： | “雷达信号处理国防科技重点实验室基金”(No.99JS01.4.1.DZ2401) |
| |
| 摘 要： | 该文首先建立了机载合成孔径雷达（SAR）对运动目标的回波信号模型，阐述了其本质为线性调频信号的特点，根据这种特点，提出了一种基于分数阶Fourier变换的机载SAR运动目标检测新方法，有效地消除了线性调频信号的时频耦合特性对信号检测的影响，与双线性时频分布类算法相比，分数阶Fourier变换是线性变换，在多运动目标存在的情况下，不会受到交叉项的影响，仿真结果验证了算法的有效性。
|
| 关 键 词： | 机载SAR 分数阶Fourier变换 合成孔径雷达 运动目标检测 线性调频信号 |
| 收稿时间： | 2001-4-9 |
| 修稿时间： | 2001年4月9日 |
The airborne sar moving target detection based on fractional fourier transform |
| |
| Sun Hongbo,Gu Hong,Su Weimin,Liu Guosui.The airborne sar moving target detection based on fractional fourier transform[J].Journal of Electronics & Information Technology,2002,24(8):1060-1065. |
| |
| Authors: | Sun Hongbo Gu Hong Su Weimin Liu Guosui |
| |
| Affiliation: | Res. Center of Electron. Eng. Tech., Nanjing Univ. of Sci. and Tech., Nanjing 210094 China |
| |
| Abstract: | In this paper, the signal model of airborne SAR moving target echo is constructed firstly, which is a chirp signal naturally. According to this feature, a new technique of SAR moving target detection based on fractional Fourier transform is proposed. The effects of coupling in time-frequency domain on signal detection are eliminated. Compared with the bilinear time-frequency distribution algorithms, the fractional Fourier transform is a linear operator, and it will not affected by the intercross terms when multiple moving targets exist. The simulation results validate the effectiveness of this technique. |
| |
| Keywords: | Fractional Fourier transform Synthetic Aperture Radar (SAR) Moving target detection |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《电子与信息学报》浏览原始摘要信息 |
|
点击此处可从《电子与信息学报》下载全文 |
