Direction-finding of coherent signals based on cylindrical vector-hydrophones array |
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Authors: | Jian-Wu Tao Wen-Xiu Chang Wei Cui |
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Affiliation: | 1. Department of Control Engineering, Aviation University, 130022, Changchun, Jilin, China 2. College of Communication Engineering, Jilin University, 130025, Changchun, Jilin, China
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Abstract: | In this paper, a new “particle-velocity-field and spatial smoothing” (PVFSS) algorithm is proposed for direction-finding of coherent signals, using the cylindrical vector-hydrophones array in the underwater acoustic medium. In contrast to the customary “spatial smoothing” technique, it provides a smaller reduction in the overall array’s spatial aperture. While in contrast to the “particle-velocity-field smoothing” technique, it may increase the number of decorrelate-able coherent signals. Moreover, an ESPRIT-based, closed-form direction-finding algorithm is proposed and a method of removing cyclic ambiguity is provided. Finally, the theoretical performance of the proposed algorithm is analyzed. Simulation results are shown to verify the efficacy of the proposed algorithm. |
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