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浙江大学学报(工学版)
J4  2013, Vol. 47 Issue (1): 62-69    DOI: 10.3785/j.issn.1008-973X.2013.01.009
    
Matched-field three-dimensional source localization
using spiral line array
LIU Feng-xia1, PAN Xiang1,GONG Xian-yi1,2
1.Institute of Information and Communication Engineering, Zhejiang University, Hangzhou 310027, China;
2. Hangzhou Applied Acoustics Research Institute, Hangzhou 310012, China
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Abstract  

Three-dimensional source localization was investigated using a short hybrid array. The array was designed to be a double spiral line array (DSLA) in order to simultaneously estimate the acoustic source bearing, range and depthby using its horizontal and vertical aperture. Arbitrary two elements of the array are different from each other in three-dimensional coordinates, resulting in complexity of spatial orientation. Broadband midfrequency signals were used for improvement of the localization reliability of the short DSLA. Simulation and experimental results demonstrate that using broadband signals can further improve the DSLA localization performance. Additionally, L∞ estimator was used to solve the problem of environmental mismatch. Simulation results show that DSLA performs better than a tilted linear array in source localization due to complexity of spatial orientation, and L∞ estimator has better environmental tolerance than MAP estimator and Bartlett estimator with a little priori knowledge of ocean environments．

Published: 01 January 2013
CLC:  TN 911.7  
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Cite this article:

LIU Feng-xia, PAN Xiang,GONG Xian-yi. Matched-field three-dimensional source localization
using spiral line array. J4, 2013, 47(1): 62-69.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2013.01.009     OR     http://www.zjujournals.com/eng/Y2013/V47/I1/62


螺旋线阵匹配场三维定位

研究短混合阵声源三维定位方法,将阵设计为双螺旋线阵(DSLA),利用垂直孔径和水平孔径同时估计声源方位、距离和深度.阵的任意两阵元三维坐标均不同,具有复杂的空间取向性.为了提高短DSLA定位的可靠性,采用宽带中频信号进行声源定位.仿真和实验结果表明,利用宽带信号可以进一步提高DSLA定位性能.关于环境失配问题,采用L∞估计器进行解决.仿真结果表明,由于空间取向的复杂性,DSLA较倾斜阵具有更好的源定位性能；在较少环境先验知识的前提下,L∞估计器比MAP 估计器和Bartlett估计器具有更好的环境宽容性.

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