| SAR图像中动目标的广义似然比快速检测 |
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| 引用本文： | 宫和斌,马继志,陈广东.SAR图像中动目标的广义似然比快速检测[J].系统工程与电子技术,2009,31(5):1101-1104. |
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| 作者姓名： | 宫和斌 马继志 陈广东 |
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| 作者单位： | 1. 南京大桥机器有限公司, 江苏, 南京, 211100;2. 中国人民解放军73908部队, 江苏, 南京, 210037;3. 南京航空航天大学, 江苏, 南京, 210016 |
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| 摘 要： | 研究经Keystone变换后在SAR图像方位向信号中,根据广义似然比检验法(最优检测)检测动目标.将广义似然比检测与遗传算法结合,利用遗传算法的全局优化特性以及解决多参数问题的良好特性,提高了运算速度.由于考虑了天线方向图的影响,充分利用目标的距离向和方位向运动信息,此方法对匀速直线运动点目标的检测效果良好.
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| 关 键 词： | 合成孔径雷达 动目标检测 广义似然比检测 |
| 收稿时间： | 2008-01-31 |
| 修稿时间： | 2008-07-29 |
Detection of moving targets in SAR images by using generalized likelihood ratio test method |
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| GONG He-bin,MA Ji-zhi,CHEN Guang-dong.Detection of moving targets in SAR images by using generalized likelihood ratio test method[J].System Engineering and Electronics,2009,31(5):1101-1104. |
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| Authors: | GONG He-bin MA Ji-zhi CHEN Guang-dong |
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| Institution: | 1. Nanjing Bridge Machine Plant, Nanjing 211100, China;2. 73908 Unit of the PLA, Nanjing 210037, China;3. Nanjing Univ. of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | An optimal scheme is provided for the detection of moving objects observed in airborne SAR images.The keystone transform can correct the linear range migration of moving targets.After the keystone transform,moving target signatures are spread along the slow-time Doppler domain.A generalized likelihood ratio test approach is then adopted to detect moving targets and estimate their parameters in Gaussian noise.By taking into account the antenna radiation pattern,the proposed algorithm determines not only the target location,but also the two components of the velocity vector(cross-ranger and slant-range velocity).Combined with the genetic algorithm,the effective parameter estimation and high detection speed are achieved. |
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