| 利用Toeplitz特性改善来波方向估计性能 |
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| 引用本文： | 斯德谊,乐强,沈士团.利用Toeplitz特性改善来波方向估计性能[J].北京航空航天大学学报,1998,24(3):267-269. |
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| 作者姓名： | 斯德谊 乐强 沈士团 |
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| 作者单位： | 北京航空航天大学 电子工程系 |
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| 基金项目： | 国防科技预研基金(96J7.2.4.HK0112)资助项目 |
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| 摘 要： | 提出一种利用协方差矩阵的Toeplitz特性,使估计的协方差矩阵成为Toeplitz矩阵的方法,在低信噪比短数据流情况下,改善来波方向(DOA)估计的性能,且不需增加乘法运算量.对MUSIC算法和PRO-ESPRIT算法进行了分析并作了计算机仿真,仿真结果表明:利用Toeplitz特性后,MUSIC算法谱峰幅度增大,波谷相对波峰的深度增加,这将有利于目标的分辨;并可减小低信噪比情况下MUSIC算法和PRO-ESPRIT算法DOA估计的方差.
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| 关 键 词： | 测向 参数估计 信息处理 Toeplitz矩阵 |
| 收稿时间： | 1997-01-20 |
Method to Improve Performance of Estimation of DOA Using Toeplitz Characteristic |
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| Si Deyi,Le Qiang,Shen Shituan.Method to Improve Performance of Estimation of DOA Using Toeplitz Characteristic[J].Journal of Beijing University of Aeronautics and Astronautics,1998,24(3):267-269. |
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| Authors: | Si Deyi Le Qiang Shen Shituan |
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| Institution: | Beijing University of Aeronautics and Astronautics,Dept. of Electronic Engineering |
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| Abstract: | A method is proposed to make the estimation of the covariance become Toeplitz matrix using the Toeplitz characteristic of covariance matrix . It can improve the performance of estimation of DOA in the low SNR and shot snapshot , and dose not add complex multiplication. It is used in the MUSIC algorithm and the PRO-ESPRIT algorithm . The numerical simulation results show that the spatial spectrum and the depth between wave crest and trough are increased in the MUSIC algorithm , and the standard deviations of the estimation of DOA are decreased in the MUSIC algorithm and the PRO-ESPRIT algorithm in the low SNR .The method can be used in other DOA estimation algorithm . |
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| Keywords: | orientation parameter estimations information processing Toeplitz matrix |
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