| The effect of spatial coherence of sound field on subspace-based high-resolution spatial spectrum estimation |
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| 引用本文： | ZHANG Aimin HUANG Xiaodi LIN Jing. The effect of spatial coherence of sound field on subspace-based high-resolution spatial spectrum estimation[J]. 声学学报：英文版, 2005, 24(4): 300-311 |
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| 作者姓名： | ZHANG Aimin HUANG Xiaodi LIN Jing |
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| 作者单位： | [1]National Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences Beijing 100080 [2]Graduate School of Chinese Academy of Sciences Beijing 100080, Institute of Acoustics, Chinese Academy of Sciences Beijing 100080 |
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| 摘 要： | When the signals received by any two array elements are not fully correlated, the performance of DOA (Direction Of Arrival) estimation methods might degrade if the plane-wave model assumption is still used. For narrowband uniform linear array, by utilizing the property of Toeplitz matrix, it is proved that the received signals can be expressed as the sum of several plane-wave signals, which can be viewed as the "splitting" parts of the true sources. The "splitting" of sources makes it difficult to estimate the true number of sources. As a result, spurious peaks might occur in the spatial spectrum when subspace-based high-resolution spatial spectrum estimation technique is used.
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| 关 键 词： | 空间相干性 声场 高分辨率空间频谱估计 子空间 |
| 收稿时间： | 2005-01-21 |
| 修稿时间： | 2005-01-212005-03-01 |
The effect of spatial coherence of sound field on subspace-based high-resolution spatial spectrum estimation |
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| ZHANG;Aimin;HUANG;Xiaodi;LIN;Jing. The effect of spatial coherence of sound field on subspace-based high-resolution spatial spectrum estimation[J]. Chinese Journal of Acoustics, 2005, 24(4): 300-311 |
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| Authors: | ZHANG Aimin HUANG Xiaodi LIN Jing |
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