| 基于分数阶傅里叶变换的线性 调频信号二维波达方向估计 |
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| 引用本文： | 杨小明,陶然.基于分数阶傅里叶变换的线性 调频信号二维波达方向估计[J].电子学报,2008,36(9):1737-1740. |
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| 作者姓名： | 杨小明 陶然 |
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| 作者单位： | 北京理工大学电子工程系,北京,100081 |
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| 基金项目： | 国家自然科学基金，国家自然科学基金 |
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| 摘 要： | 本文提出了一种基于分数阶傅里叶变换(Fractional Fourier Transform,FRFT)的多线性调频(Linear Frequency Modulation,LFM)信号二维波达方向(Direction of Arrival,DOA)估计方法.该方法利用FRFT对LFM信号的能量聚集特性,构造出一种新的分数阶傅里叶域的阵列信号数据模型,并利用MUSIC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： | 分数阶傅里叶变换 线性调频信号 二维波达方向估计 |
| 收稿时间： | 2007-01-31 |
2-D DOA Estimation of LFM Signals Based on Fractional Fourier Transform |
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| YANG Xiao-ming,TAO Ran.2-D DOA Estimation of LFM Signals Based on Fractional Fourier Transform[J].Acta Electronica Sinica,2008,36(9):1737-1740. |
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| Authors: | YANG Xiao-ming TAO Ran |
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| Affiliation: | YANG Xiao-ming,TAO Ran(Department of Electronic Engineering,Beijing Institute of Technology,Beijing 100081,China) |
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| Abstract: | A new method to estimate 2-D DOA of multiple LFM signals is proposed.Based on a fact that the LFM signal has the energy-concentrated performance in the fractional Fourier transform domain(FRFD),a novel array data model in FRFD is constructed,MUSIC algorithm is then applied on correlation matrix in FRFD to obtain the 2-D DOA estimation of multiple LFM sources.The simulation results verified the efficiency of the new method. |
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| Keywords: | fractional Fourier transform LFM signal 2-D DOA estimation |
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