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2D Direction Finding of Coherent Sources Using Three Parallel Sparse Arrays with Less Computational Complexity

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Abstract

This paper addresses the problem of two-dimensional (2D) direction of arrival estimation of coherent sources with less computational complexity using sparse arrays. The proposed method incorporates the unitary ESPRIT method into three parallel nested and coprime arrays configuration. The advantages of the proposed method are computationally efficient due to real-valued operations, automatic pairing of 2D angles, resolves coherent targets, large array aperture and less mutual coupling. Simulation results show the effectiveness of the proposed method. Cramer–Rao lower bound (CRLB) has been given for the reference. The performance of the proposed method is compared with the methods available in the existing literature. The results achieved by the proposed method were found to be significant in terms of estimation accuracy, resolution, and the computational complexity.

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The datasets generated and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, National Institute of Technology, Tiruchirappalli, 620 015, India

    Gowri Kumar & Palanisamy Ponnusamy

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  1. Gowri Kumar
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  2. Palanisamy Ponnusamy
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Correspondence to Gowri Kumar.

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Kumar, G., Ponnusamy, P. 2D Direction Finding of Coherent Sources Using Three Parallel Sparse Arrays with Less Computational Complexity. Circuits Syst Signal Process 40, 4576–4593 (2021). https://doi.org/10.1007/s00034-021-01683-z

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  • DOI: https://doi.org/10.1007/s00034-021-01683-z

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