| 引用本文: | 闫金山,彭秀艳,王咸鹏.基于酉变换的虚拟阵列DOA估计算法[J].哈尔滨工业大学学报,2012,44(4):136.DOI:10.11918/j.issn.0367-6234.2012.04.027 |
| YAN Jin shan,PENG Xiu yan,WANG Xian peng.A virtual array method for direction of arrival estimation based on unitary transformation[J].Journal of Harbin Institute of Technology,2012,44(4):136.DOI:10.11918/j.issn.0367-6234.2012.04.027 |
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| 摘要: |
| 为了估计相干信源的波动方向,提出基于酉变换的虚拟阵列DOA估计算法．该算法通过阵列虚拟平移形成虚拟阵列对相干信号进行解相干,并利用酉变换将虚拟阵列接收数据的协方差矩阵从复数域变换到实数域,然后利用该实数矩阵进行波达方向估计．计算机仿真表明算法在低信噪比情况下具有很好的解相干特性和估计性能．该算法避免了阵列孔径损失,可在小采样拍数情况下实现相干信源的DOA估计,且运算在实数域进行,大大降低了运算复杂度． |
| 关键词: 相干信源 虚拟阵列 酉变换 波达方向 |
| DOI：10.11918/j.issn.0367-6234.2012.04.027 |
| 分类号:TN9117 |
| 基金项目:新世纪优秀人才支持计划项目(NCET 11 0827) |
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| A virtual array method for direction of arrival estimation based on unitary transformation |
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YAN Jinshan, PENG Xiuyan, WANG Xianpeng
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College of Automation, Harbin Engineering University, 150001 Harbin, China
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| Abstract: |
| To estimate direction of arrival for the coherent signals, a virtual array method for direction of arrival estimation based on unitary transformation is proposed. In this approach, the covariance matrix, which is obtained from virtual array, is reconstructed by utilizing a unitary transformation matrix. The simulation results verify that the proposed method has high performance of de correlation and estimation. The proposed method can de correlate the coherent sources without a lot of snapshots and a reduction in array aperture. All of matrix computation are in real valued space, thus, the computation complexity is very low. |
| Key words: coherent signal virtual array unitary transformation direction of arrival |
