| 运动规律已知的目标脱靶量测量方法 |
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| 引用本文： | 侯舒娟,吴嗣亮.运动规律已知的目标脱靶量测量方法[J].北京理工大学学报,2005,25(7):625-627. |
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| 作者姓名： | 侯舒娟 吴嗣亮 |
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| 作者单位： | 北京理工大学,信息科学技术学院电子工程系,北京,100081 |
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| 摘 要： | 研究运动规律已知的目标脱靶量测量问题.根据多普勒频率和脱靶量的参数方程,提出了一种脱靶量测量的新方法:首先通过时频变换,将目标回波信号表示为以频谱强度为灰度值的图像;然后通过门限检测把灰度图像变为二值图像;最后利用基于随机Hough变换(RHT)的曲线检测,通过求解多普勒频率和脱靶量参数方程获得脱靶量的估计值.打靶实测试验结果表明,该方法能够有效地克服多普勒频率测量误差对脱靶量测量的影响,提高了脱靶量的测量精度.
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| 关 键 词： | 脱靶量 多普勒频率 时频变换 随机Hough变换(RHT) 运动规律 目标回波 脱靶量测量 测量方法 Motion Modes Known Miss Distance 测量精度 影响 测量误差 结果 实测试验 估计值 求解 曲线检测 时频变换 Hough 随机 利用 |
| 文章编号： | 1001-0645（2005）07-0625-04 |
| 收稿时间： | 2004-09-16 |
| 修稿时间： | 2004-09-16 |
Measurement of Miss Distance for Targets with Known Modes of Motion |
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| HOU Shu-juan and WU Si-liang.Measurement of Miss Distance for Targets with Known Modes of Motion[J].Journal of Beijing Institute of Technology(Natural Science Edition),2005,25(7):625-627. |
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| Authors: | HOU Shu-juan and WU Si-liang |
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| Institution: | Department of Electronic Engineering, School of Information Science and Technology, Beijing Institute of Technology, Beijing100081, China;Department of Electronic Engineering, School of Information Science and Technology, Beijing Institute of Technology, Beijing100081, China |
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| Abstract: | Measurement of miss distance for targets with known modes of motion is studied. According to the parametric function of Doppler frequency and miss distance parameters, a novel miss distance measuring method is proposed. The echo signal is first represented as a gray image with spectral intensity as its gray values by time-frequency transformation. Then the gray image is converted to a binary image by threshold detection. The estimated value of miss distance is then obtained by solving the parametric function of Doppler frequency and miss distance parameters, based on the randomized Hough transform (RHT). Experimental results based on real-life data show that the proposed method can effectively overcome the influence of errors of Doppler frequency on the measurement of miss distance and can improve the precision in miss distance measurement. |
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| Keywords: | miss distance Doppler frequency time-frequency transformation randomized Hough transform (RHT) |
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