| A new source number estimation method based on the beam eigenvalue |
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| 引用本文： | JIANG Lei CAI Ping YANG Juan WANG Yi-ling XU Dan. A new source number estimation method based on the beam eigenvalue[J]. 船舶与海洋工程学报, 2007, 6(1): 41-46. DOI: 10.1007/s11804-007-6050-4 |
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| 作者姓名： | JIANG Lei CAI Ping YANG Juan WANG Yi-ling XU Dan |
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| 作者单位： | JIANG Lei，CAI Ping，YANG Juan，WANG Yi-ling，and XU Dan College of Underwater Acoustic Engineering，Harbin Engineering University，Harbin 150001，China |
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| 摘 要： | Most source number estimation methods based on the eigenvalues are decomposed by covariance matrix in MUSIC algorithm. To develop the source number estimation method which has lower signal to noise ratio and is suitable to both correlated and uncorrelated impinging signals, a new source number estimation method called beam eigenvalue method (BEM) is proposed in this paper. Through analyzing the space power spectrum and the correlation of the line array, the covariance matrix is constructed in a new way, which is decided by the line array shape when the signal frequency is given. Both of the theory analysis and the simulation results show that the BEM method can estimate the source number for correlated signals and can be more effective at lower signal to noise ratios than the normal source number estimation methods.
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| 关 键 词： | 声源数 估计方法 DOA 波束本征值 水声信道 |
| 文章编号： | 1671-9433（2007）01-0041-06 |
| 收稿时间： | 2006-10-19 |
A new source number estimation method based on the beam eigenvalue |
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| Jiang Lei,Cai Ping,Yang Juan,Wang Yi-ling,Xu Dan. A new source number estimation method based on the beam eigenvalue[J]. Journal of Marine Science and Application, 2007, 6(1): 41-46. DOI: 10.1007/s11804-007-6050-4 |
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| Authors: | Jiang Lei Cai Ping Yang Juan Wang Yi-ling Xu Dan |
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| Affiliation: | (1) College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin, 150001, China |
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| Abstract: | Most source number estimation methods based on the eigenvalues are decomposed by covariance matrix in MUSIC algorithm. To develop the source number estimation method which has lower signal to noise ratio and is suitable to both correlated and uncorrelated impinging signals, a new source number estimation method called beam eigenvalue method (BEM) is proposed in this paper. Through analyzing the space power spectrum and the correlation of the line array, the covariance matrix is constructed in a new way, which is decided by the line array shape when the signal frequency is given. Both of the theory analysis and the simulation results show that the BEM method can estimate the source number for correlated signals and can be more effective at lower signal to noise ratios than the normal source number estimation methods. |
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| Keywords: | source number estimation DOA estimation beam eigenvalue MUSIC |
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