| 一种用于水平柔性长线水听器阵阵形估计的新算法 |
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| 引用本文： | 梁国龙,刘凯,嵇建飞,付进.一种用于水平柔性长线水听器阵阵形估计的新算法[J].南京理工大学学报(自然科学版),2011,35(3). |
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| 作者姓名： | 梁国龙 刘凯 嵇建飞 付进 |
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| 作者单位： | 哈尔滨工程大学,水声技术国家级重点实验室,黑龙江哈尔滨150001 |
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| 基金项目： | 国家自然科学基金(51009042); 高等学校博士学科点专项科研基金(20102304120030); 黑龙江省自然科学基金(E201024) |
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| 摘 要： | 为获取水平柔性长线水听器阵列的实际阵形以提高后续阵列信号处理算法的性能,提出了一种阵形估计的新算法。该算法假设辅助声源信号为宽带球面波,通过对各个频率点处的协方差矩阵进行特征分解,构造了一个基于加权子空间拟合思想的拟合函数。利用高斯-牛顿和交替投影算法实现了阵形的离线估计,并对在实际应用中可能会影响算法性能的四种主要的误差源进行了分析。实验结果表明,相对于辅助声源为窄带平面波的算法,新算法放宽了对辅助声源带宽和距离的要求,具有良好的估计精度和更大的宽容性。
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| 关 键 词： | 水平柔性长线阵 阵形估计 宽带球面波 加权子空间拟合 |
Novel Algorithm for Array Shape Estimation of Horizontal Flexible Long-line Hydrophone Array |
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| LIANG Guo-long,LIU Kai,JI Jian-fei,FU Jin.Novel Algorithm for Array Shape Estimation of Horizontal Flexible Long-line Hydrophone Array[J].Journal of Nanjing University of Science and Technology(Nature Science),2011,35(3). |
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| Authors: | LIANG Guo-long LIU Kai JI Jian-fei FU Jin |
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| Institution: | LIANG Guo-long,LIU Kai,JI Jian-fei,FU Jin(National Laboratory of Underwater Acoustic Technology,Harbin Engineering University,Harbin 150001,China) |
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| Abstract: | To obtain a true array shape of a horizontal flexible long-line hydrophone array and improve the performance of the subsequent signal processing algorithm,a novel algorithm for array shape estimation is proposed.With the assumption that the signal emitted by auxiliary sources is a wideband spherical wave,a fitting function is first constructed based on the theory of weighted subspace fitting through the eigen-decomposition of the covariance matrix at each frequency point.The off-line estimation of a array s... |
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| Keywords: | horizontal flexible long-line array array shape estimation wideband spherical wave weighted subspace fitting |
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