| 基于均匀圆阵的信号二维方向角和多普勒频率的盲估计 |
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| 引用本文： | 陶建武,石要武,常文秀. 基于均匀圆阵的信号二维方向角和多普勒频率的盲估计[J]. 计量学报, 2003, 24(3): 231-235 |
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| 作者姓名： | 陶建武 石要武 常文秀 |
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| 作者单位： | 1. 空军第二航空学院,吉林,长春,130022;吉林大学通讯学院,吉林,长春,130025
2. 吉林大学通讯学院,吉林,长春,130025 |
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| 基金项目： | 国家自然科学基金 ( 69872 0 12 ) |
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| 摘 要： | 针对均匀圆形阵列 ,在时空旋转因子的基础上 ,推导出四阶累积量矩阵 ,采用波达方向矩阵法 ,实现了信号的方位角、俯仰角和多普勒频率的同时估计。此估计算法利用所有阵元信息估计信号波达方向 ,提高了方向估计精度 ,解决了“频率兼并”问题 ,使有效应用范围扩大。利用了四阶累积量的盲高斯性 ,有效地抑制了高斯白或有色噪声的影响 ,仿真结果表明了此算法的有效性
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| 关 键 词： | 计量学 信号处理 均匀圆阵 二维方向角和频率估计 四阶累积量 时空旋转 |
| 文章编号： | 1000-1158(2003)03-0231-05 |
| 修稿时间： | 2002-05-09 |
Blind Estimation of 2D Angle and Doppler Frequency for Signals via UCA |
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| TAO Jian wu , SHI Yao wu ,CHANG Wen xiu. Blind Estimation of 2D Angle and Doppler Frequency for Signals via UCA[J]. Acta Metrologica Sinica, 2003, 24(3): 231-235 |
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| Authors: | TAO Jian wu SHI Yao wu CHANG Wen xiu |
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| Affiliation: | TAO Jian wu 1,2 SHI Yao wu 2,CHANG Wen xiu 2 |
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| Abstract: | For signals incident on a uniform circular array (UCA), a new blind estimation of azimuths, elevations and Doppler frequency are proposed. The mode excitation method is used to transform the manifold matrix of UCA into one with a form similar to that of ULA. By adopting the space time rotational techniques, a fourth order cumulant based DOA matrix is deduced. The new method can completely estimate the 2D angles of multiple signals even with the same Doppler frequency each other. The Gaussian white or colored noises within signal sources can efficiently suppressed. The estimate precision has been improved due to using the value of all sensors. Simulations are presented to show the validity of this method. |
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| Keywords: | Metrology Signal processing Uniform circular array Two dimensional parameter estimation Fourth order cumulant Space time rotation |
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