| Source localization using a non-cocentered orthogonal loop and dipole （NCOLD） array |
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| 作者姓名： | Liu Zhaoting Xu Tongyang |
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| 作者单位： | Department of Electrical Engineering, Shaoxing University;School of Information Management,Shanxi University of Finance and Economics |
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| 基金项目： | supported by the Scientifc Research Fund of Zhejiang Provincial Education Department(No.Y201225848);the Scientifc and Technological Innovation Programs of Higher Education Institutions in Shanxi(No.2013124) |
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| 摘 要： | A uniform array of scalar-sensors with intersensor spacings over a large aperture size generally offers enhanced resolution and source localization accuracy,but it may also lead to cyclic ambiguity.By exploiting the polarization information of impinging waves,an electromagnetic vector-sensor array outperforms the unpolarized scalar-sensor array in resolving this cyclic ambiguity.However,the electromagnetic vector-sensor array usually consists of cocentered orthogonal loops and dipoles（COLD）,which is easily subjected to mutual coupling across these cocentered dipoles/loops.As a result,the source localization performance of the COLD array may substantially degrade rather than being improved.This paper proposes a new source localization method with a non-cocentered orthogonal loop and dipole（NCOLD）array.The NCOLD array contains only one dipole or loop on each array grid,and the intersensor spacings are larger than a half-wavelength.Therefore,unlike the COLD array,these well separated dipoles/loops minimize the mutual coupling effects and extend the spatial aperture as well.With the NCOLD array,the proposed method can effciently exploit the polarization information to offer high localization precision.
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| 关 键 词： | 矢量传感器阵列 声源定位 偶极子 环和 正交 COLD 定位精度 非偏振 |
| 收稿时间： | 5 September 2012 |
Source localization using a non-cocentered orthogonal loop and dipole (NCOLD) array |
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| Liu Zhaoting,Xu Tongyang.Source localization using a non-cocentered orthogonal loop and dipole (NCOLD) array[J].Chinese Journal of Aeronautics,2013,26(6):1471-1476. |
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| Authors: | Liu Zhaoting;Xu Tongyang; |
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| Institution: | Liu Zhaoting;Xu Tongyang;Department of Electrical Engineering, Shaoxing University;School of Information Management,Shanxi University of Finance and Economics; |
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| Abstract: | A uniform array of scalar-sensors with intersensor spacings over a large aperture size generally offers enhanced resolution and source localization accuracy, but it may also lead to cyclic ambiguity. By exploiting the polarization information of impinging waves, an electromagnetic vector-sensor array outperforms the unpolarized scalar-sensor array in resolving this cyclic ambiguity. However, the electromagnetic vector-sensor array usually consists of cocentered orthogonal loops and dipoles (COLD), which is easily subjected to mutual coupling across these cocentered dipoles/loops. As a result, the source localization performance of the COLD array may substantially degrade rather than being improved. This paper proposes a new source localization method with a non-cocentered orthogonal loop and dipole (NCOLD) array. The NCOLD array contains only one dipole or loop on each array grid, and the intersensor spacings are larger than a half-wavelength. Therefore, unlike the COLD array, these well separated dipoles/loops minimize the mutual coupling effects and extend the spatial aperture as well. With the NCOLD array, the proposed method can efficiently exploit the polarization information to offer high localization precision. |
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| Keywords: | Array signal processing Direction of arrival（DOA） estimation Electromagnetic vector-sensor array Polarization Source localization |
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