21 July 2017 Ambiguity resolving based on cosine property of phase differences for 3D source localization with uniform circular array
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Proceedings Volume 10420, Ninth International Conference on Digital Image Processing (ICDIP 2017); 104204K (2017) https://doi.org/10.1117/12.2281917
Event: Ninth International Conference on Digital Image Processing (ICDIP 2017), 2017, Hong Kong, China
Abstract
Localization of a source whose half-wavelength is smaller than the array aperture would suffer from serious phase ambiguity problem, which also appears in recently proposed phase-based algorithms. In this paper, by using the centro-symmetry of fixed uniform circular array (UCA) with even number of sensors, the source’s angles and range can be decoupled and a novel ambiguity resolving approach is addressed for phase-based algorithms of source’s 3-D localization (azimuth angle, elevation angle, and range). In the proposed method, by using the cosine property of unambiguous phase differences, ambiguity searching and actual-value matching are first employed to obtain actual phase differences and corresponding source’s angles. Then, the unambiguous angles are utilized to estimate the source’s range based on a one dimension multiple signal classification (1-D MUSIC) estimator. Finally, simulation experiments investigate the influence of step size in search and SNR on performance of ambiguity resolution and demonstrate the satisfactory estimation performance of the proposed method.
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Xin Chen, Xin Chen, Shuhong Wang, Shuhong Wang, Zhen Liu, Zhen Liu, Xizhang Wei, Xizhang Wei, } "Ambiguity resolving based on cosine property of phase differences for 3D source localization with uniform circular array", Proc. SPIE 10420, Ninth International Conference on Digital Image Processing (ICDIP 2017), 104204K (21 July 2017); doi: 10.1117/12.2281917; https://doi.org/10.1117/12.2281917
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