| 用均匀圆阵实现宽频段来波信号频率和二维角估计 |
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| 引用本文： | 斯德谊,乐强,沈士团,周荫清.用均匀圆阵实现宽频段来波信号频率和二维角估计[J].电子与信息学报,1999,21(3):302-306. |
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| 作者姓名： | 斯德谊 乐强 沈士团 周荫清 |
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| 作者单位： | 北京航空航天大学电子工程系，北京航空航天大学电子工程系，北京航空航天大学电子工程系，北京航空航天大学电子工程系 北京 100083，北京 100083，北京 100083，北京 100083 |
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| 基金项目： | 国防预研科学基金，航空部九五预研课题 |
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| 摘 要： | 本文提出了一种在DFT波束空间实时估计入射到均匀圆阵(UCA)上宽频段(1～18GHz)信号的频率、方位角和仰角的方法。该方法可在时间欠采样条件下实现频率无模糊估计,在空间欠采样条件下,用整数搜索法实现方位角和仰角无模糊估计,且频率、方位角和仰角估计可自动配对。模拟频率间接估计算法的估计方差比直接估计算法的方差要小2～3个数量级。仿真实验表明了算法是有效的。
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| 关 键 词： | 宽频段信号 频率和二维角估计 均匀圆阵 自动配对 |
| 收稿时间： | 1997-10-10 |
| 修稿时间： | 1998-7-29 |
REAL-TIME FREQUENCY AND 2D ANGLE ESTIMATION OF WIDE FREQUENCY BAND SIGNALS WITH UNIFORM CIRCULAR ARRAYS |
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| Si Deyi,Le Jiang,Shen Shituan,Zhou Yinqing.REAL-TIME FREQUENCY AND 2D ANGLE ESTIMATION OF WIDE FREQUENCY BAND SIGNALS WITH UNIFORM CIRCULAR ARRAYS[J].Journal of Electronics & Information Technology,1999,21(3):302-306. |
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| Authors: | Si Deyi Le Jiang Shen Shituan Zhou Yinqing |
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| Affiliation: | Beijing University of Aeronautics and Astronautics Beijing 100083 |
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| Abstract: | A method is presented for real-time estimation of the frequency, azimuth and elevation angles of the signal incident on uniform circular arrays(UCA) over a very wide frequency band(1~18GHz) in DFT beamspace. The method provides unambiguous frequency estimation under temporal undersampling and unambiguous azimuth and elevation estimation using integer search algorithm under spatial undersampling. The estimations of azimuth and elevation angles are automatically paired with corresponding frequency estimates. The variance of the frequency estimates of indirect method is 2~3 magnitudes less than that of the direct method. Simulations are presented demonstrating the capabilities of the method. |
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| Keywords: | Wide frequency band signals Frequency and two dimensional angle estimation Uniform circular arrays Automatic pair |
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