| A method of multi-channel reference signals acquiring in broadband ANC |
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| 作者姓名： | 马令坤 黄建国 张立杰 |
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| 作者单位： | College of Marine Engineering, Northwestern Polytechnical University, Xi＇an 710072, China |
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| 摘 要： | In a flank array on an unmanned underwater vehicle （UUV）, self-generated noise which has broadband and colored spectrum property in frequency and spatial domain is the main factor affecting the performance of weak signal detection, so the technique of adaptive noise cancellation （ANC） as well as physical denoising and active noise cancellation are often used in practice. Because ANC is based on correlations, improvements in performance come from better correlation between reference signals and primary signals. Taking full advantage of the characteristics of flank arrays and the characteristics of information obtained from hydrophones, a new method for reference signal acquisition for adaptive noise cancellation is proposed, in which the multi-channel reference signals are obtained by accurate delaying for a given direction of arrival （DOA） and differencing between adjacent outputs of array elements. The validity of the proposed method was verified through system modeling simulations and lake experiments which showed good performance with little additional computational burden.
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| 关 键 词： | 弱信号探测 自适应噪声消除 多信道涉及信号 无人驾驶水下交通工具 |
A method of multi-channel reference signals acquiring in broadband ANC |
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| Ling-kun Ma,Jian-guo Huang,Li-jie Zhang.A method of multi-channel reference signals acquiring in broadband ANC[J].Journal of Marine Science and Application,2008,7(3):190-194. |
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| Authors: | Ling-kun Ma Jian-guo Huang Li-jie Zhang |
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| Institution: | (1) College of Marine Engineering, Northwestern Polytechnical University, Xi’an, 710072, China |
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| Abstract: | In a flank array on an unmanned underwater vehicle(UUV),self-generated noise which has broadband and colored spectrum property in frequency and spatial domain is the main factor affecting the performance of weak signal detection,so the technique of adaptive noise cancellation(ANC)as well as physical denoising and active noise cancellation are often used in practice.Because ANC is based on correlations,improvements in performance come from better correlation between reference signals and primary signals.Taking full advantage of the characteristics of flank arrays and the characteristics of information obtained from hydrophones,a new method for reference signal acquisition for adaptive noise cancellation is proposed,in which the multi-channel reference signals are obtained by accurate delaying for a given direction of arrival(DOA)and differencing between adjacent outputs of array elements.The validity of the proposed method was verified through system modeling simulations and lake experiments which showed good performance with little additional computational burden. |
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| Keywords: | weak signal detection adaptive noise cancellation multi-channel reference signal |
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