| 基于时频分析的高频雷达目标检测与定向 |
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| 引用本文： | 周浩,文必洋,吴世才,马志刚.基于时频分析的高频雷达目标检测与定向[J].电子学报,2005,33(12):2265-2268. |
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| 作者姓名： | 周浩 文必洋 吴世才 马志刚 |
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| 作者单位： | 武汉大学电子信息学院,湖北,武汉,430079;武汉大学电子信息学院,湖北,武汉,430079;武汉大学电子信息学院,湖北,武汉,430079;武汉大学电子信息学院,湖北,武汉,430079 |
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| 摘 要： | 针对宽波束高频雷达对非平稳目标探测的问题,提出了一种新的基于线性时频分析的目标检测与定向方法,即先从时频面上检测出目标的时频脊,然后沿脊线对线性时频表示采样形成阵列快拍,进行空间谱估计.分析了目标横向运动对空间谱估计的影响,提出了横向运动补偿及目标时变方位和横向速度估计的方法.雷达实测数据处理表明,本文方法能有效地应用于宽波束高频雷达对非平稳目标的探测中.
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| 关 键 词： | 高频雷达 时频分析 定向 横向速度 |
| 文章编号： | 0372-2112（2005）12-2265-04 |
| 收稿时间： | 2004-08-15 |
| 修稿时间： | 2004-08-152005-07-11 |
Target Detection and Direction Finding with HF Radars Based on Time-Frequency Analysis |
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| ZHOU Hao,WEN Bi-yang,WU Shi-cai,MA Zhi-gang.Target Detection and Direction Finding with HF Radars Based on Time-Frequency Analysis[J].Acta Electronica Sinica,2005,33(12):2265-2268. |
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| Authors: | ZHOU Hao WEN Bi-yang WU Shi-cai MA Zhi-gang |
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| Affiliation: | School of Electronic Information,Wuhan University,Wuhan,Hubei 430079,China |
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| Abstract: | A novel method for non-stationary target detection and direction finding with broad-beam high-frequency(HF) radars based on time-frequency analysis is proposed.Target ridges on the time-frequency representation(TFR) of the echo data are detected,and then array snapshots are formed by sampling the TFR along the ridges,which are finally used to calculate the spatial spectra.Furthermore,the effects on target direction finding due to the cross-range motion of the target are analyzed,and a motion-compensation method is developed,which can effectively estimate the time-variant direction as well as the cross-range velocity of the target.Radar echo signal processing results show the validness of the above methods for the detection and direction finding of non-stationary targets with broad-beam HF radars. |
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| Keywords: | HF radar time-frequency analysis direction finding cross-range velocity |
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