| 天然粗糙面杂波中雷达目标的检测 |
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| 引用本文： | 方旭明,诸昌钤,范平志.天然粗糙面杂波中雷达目标的检测[J].电子学报,2000,28(7):4-7. |
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| 作者姓名： | 方旭明 诸昌钤 范平志 |
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| 作者单位： | 1. 西安电子科技大学电子工程学院,陕西西安 710071;2. 深圳大学校长办公室,广东深圳 518060 |
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| 基金项目： | 国家自然科学基金!(No.6982 51 0 2 ) |
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| 摘 要： | 本文引入时变分形曲面描述天然粗糙面的局部动态特征,给出三个合理电磁散射假设,采用基尔霍夫解定性分析散射的时域分形特性,导出天然粗糙面杂波的分形模型.根据随机分形信号小波系数近似不相关的特性,提出小波白化滤波—相关检测法,并详细论述了该方法的相关理论.理论分析和实验表明,天然粗糙面杂波符合分形模型,文中所提出的方法可以有效地实现杂波中雷达目标的检测.
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| 关 键 词： | 天然粗糙面 杂波 分形模型 白化滤波 相关检测 |
| 收稿时间： | 1999-05-17 |
A Sub-rating Channel Assignment Strategy in Cellular Mobile Communication Systems |
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| FANG Xu-ming,ZHU Chang-qian,FAN Ping-zhi.A Sub-rating Channel Assignment Strategy in Cellular Mobile Communication Systems[J].Acta Electronica Sinica,2000,28(7):4-7. |
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| Authors: | FANG Xu-ming ZHU Chang-qian FAN Ping-zhi |
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| Affiliation: | 1. School of Electronics Engineering,Xidian Univ.,Xi'an 710071,China;2. President Office of Shenzhen Univ.,Shenzhen 518060,China |
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| Abstract: | The time-variant fractal surface is adopted to describe regional dynamical feature of natural rough surface.Under three rational assumptions on electromagnetic scattering,the time-domain property of scattering field is analyzed qualitatively by applying Kirchhoff solution,and the fractal model of clutter from natural rough surface is deduced.According to the fact that wavelet detail coefficients of random fractal signal are approximately uncorrelated,the method based on wavelet-based whitening filter and correlation detection is proposed with detailed theory.Theoretical analysis and experimental results prove that the clutter matches the fractal model and the proposed method is effective on detecting target. |
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| Keywords: | cellular mobile communication sub rate compact pattern channel borrowing channel allocation |
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