| 基于分数阶Fourier变换和ESPRIT算法的LFM信号2D波达方向估计 |
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| 引用本文： | 杨小明,陶然.基于分数阶Fourier变换和ESPRIT算法的LFM信号2D波达方向估计[J].兵工学报,2007,28(12):1438-1442. |
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| 作者姓名： | 杨小明 陶然 |
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| 作者单位： | 北京理工大学信息科学技术学院，北京100081 |
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| 基金项目： | 国家杰出青年科学基金，国家部委预研项目 |
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| 摘 要： | 提出一种利用分数阶Fourier变换(FRFT)和旋转不变子空间(ESPRIT)算法实现多个线性调频(LFM)信号二维波达方向(DOA)估计的新方法。该方法利用FRFT对LFM信号的能量聚集特性，构造出一种新的FRFT域的阵列数据模型，并利用ESPRIT算法实现对多个LFM信号的二维DOA估计。仿真实验验证了算法的有效性。
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| 关 键 词： | 通信技术 分数阶Fourier夏换 线性调频信号 二维波达方向估计 ESPRIT算法 |
| 文章编号： | 1000-1093（2007）12-1438-05 |
| 收稿时间： | 2007-01-31 |
| 修稿时间： | 2007年1月31日 |
2D DOA Estimation of LFM Signals Based on Fractional Fourier Transform and ESPRIT Algorithm |
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| YANG Xiao-ming,TAO Ran.2D DOA Estimation of LFM Signals Based on Fractional Fourier Transform and ESPRIT Algorithm[J].Acta Armamentarii,2007,28(12):1438-1442. |
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| Authors: | YANG Xiao-ming TAO Ran |
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| Affiliation: | School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | A new method for 2D direction of arrival (DOA) of linear frequency modulation (LFM) sources was proposed by fractional Fourier transform (FRFT) and estimating signal parameters via ro?tational invariance technique (ESPRIT) algorithms. A new array model in FRFT domain was con?structed based on the fact that the LFM signal has the energy- concentrated performance in the FRFT domain, and the 2D DOA estimation of multiple LFM sources was realized by ESPRIT algorithm. Simulation results verify the correctness and efficiency of the new algorithm. |
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| Keywords: | communication fractional Fourier transform LFM signal 2D DOA estimation ESPRIT algorithm |
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