| 多途环境下的单通道水声信号盲源分离 |
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| 引用本文： | 刘 佳,杨士莪,朴胜春.多途环境下的单通道水声信号盲源分离[J].振动与冲击,2012,31(6):15-18. |
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| 作者姓名： | 刘 佳 杨士莪 朴胜春 |
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| 作者单位： | 哈尔滨工程大学 水声技术实验室 哈尔滨 150001 |
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| 基金项目： | 国防基础科研资助(A2420060088) |
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| 摘 要： | 提出了一种适用于多途环境下的单观测通道水声信号盲源分离方法。该方法首先利用自相关估计多途时延，使经各途径到达的多途信号同相叠加，信号能量得到增强，而噪声由于随机性能量不会增加，进而提高信噪比。然后采用间隔重采样的方法，虚拟多接收通道，解决单通道的欠定问题。仿真分析表明该方法可以有效解决多途环境下的舰船辐射噪声与环境噪声分离，而且在不同信噪比下有较稳定的分离性能。
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| 关 键 词： | 单通道盲源分离 多途聚焦 间隔重采样 水声信号 |
| 收稿时间： | 2010-7-25 |
| 修稿时间： | 2011-3-8 |
Single channel blind source separation for underwater acoustic signal under multipath condition |
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| LIU Jia,YANG Shi-e,PIAO Sheng-chun.Single channel blind source separation for underwater acoustic signal under multipath condition[J].Journal of Vibration and Shock,2012,31(6):15-18. |
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| Authors: | LIU Jia YANG Shi-e PIAO Sheng-chun |
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| Affiliation: | Acoustic Science & Technology Laboratory, Harbin Engineering University Harbin 150001 |
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| Abstract: | A method of single channel blind source separation for underwater acoustic signal was proposed under condition of multipath transmission.Firstly,the multipath time delay was estimated with autocorrelation.Then,the successive multipath signals were added in phase,so as to increase the signal-noise ratio.At last,virtual channels were constructed with the observed data using resample method,the limitation of single channel was overcomed.The simulation results showed that the ship-radiated noise can be separated from ambient noise using this method with single observing channel under condition of multipath transmission,and the method works stably under different SNRs. |
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| Keywords: | single channel blind source separation multipath focused resample method underwater acoustic signal |
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