| 一种新的未知相关噪声下的宽带相干信号DOA估计算法 |
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| 引用本文： | 张进,叶中付,王伟.一种新的未知相关噪声下的宽带相干信号DOA估计算法[J].宇航学报,2012,33(8):1119-1126. |
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| 作者姓名： | 张进 叶中付 王伟 |
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| 作者单位： | 1. 解放军电子工程学院,合肥,230027
2. 中国科学技术大学电子工程与信息科学系,合肥,230027 |
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| 摘 要： | 针对具有某种结构的协方差矩阵的未知相关噪声环境,本文提出了一种新的宽带相干信号DOA估计算法。基于这种结构,如Hermitian Toeplitz型,在各个频率点上首先利用空间差分操作去除相关噪声的影响,并构造新矩阵;其次,对新矩阵进行聚焦操作,并给出相干聚焦后的协方差矩阵;最后,利用基于特征结构的DOA估计算法得到相干信号的DOA估计值。理论分析和仿真结果表明了算法的有效性。
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| 关 键 词： | 宽带相干信号 相关噪声 DOA估计 空间差分操作 矩阵变换 聚焦操作 |
A Novel DOA Estimation Algorthm for Wideband Coherent Signals in the Presence of Unknown Correlated Noise |
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| ZHANG Jin
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YE Zhong-fu
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WANG Wei.A Novel DOA Estimation Algorthm for Wideband Coherent Signals in the Presence of Unknown Correlated Noise[J].Journal of Astronautics,2012,33(8):1119-1126. |
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| Authors: | ZHANG Jin YE Zhong-fu WANG Wei |
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| Institution: | 1(1.Electronic Engineering Institute,PLA,Hefei 230027,China; 2.Dept.of Electronic Engineering and Information Science,USTC,Hefei 230027,China) |
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| Abstract: | A novel direction-of-arrival estimation(DOA) algorithm is proposed for wideband coherent signals in the presence of unknown correlated noise with some structured covariance matrix.Based on such a proposed structure as Hermitian Toeplitz,a spatial differencing operation is firstly applied to remove the effect of the unknown correlated noise and a new matrix is constructed accordingly at each frequency bin.Secondly,a focusing operation is performed for the new matrices to give the coherently focused covariance matrix.Finally,an eigenstructure-based DOA estimation algorithm is applied to give DOA estimates of coherent signals.The validity of the method is supported by the theoretical analysis and simulation results. |
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| Keywords: | Wideband coherent signal Correlated noise Direction-of-arrival estimation Spatial differencing operation Matrix transformation Focusing operation |
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