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2024-09-17
A Symmetric Shifted Coprime Array for Localization of Mixed Near Field and Far Field Sources: Reduced Mutual Coupling Effect
By
Yiming Guo,

    Mr. Yiming Guo

    Zhengzhou University of Industrial Technology

    China

    Homepage

Tao Zang,

    Dr. Tao Zang

    Open University of Henan

    China

    Homepage

Fengtong Mei,

    Dr. Fengtong Mei

    Xidian University

    China

    Homepage

Qian Liu,

    Dr. Qian Liu

    Information Engineering University

    China

    Homepage

Linzi Li

    Dr. Linzi Li

    Department of Global Cultural Integration

    Kangwon National University

    Korea

    Homepage

Progress In Electromagnetics Research B, Vol. 108, 61-73, 2024
doi:10.2528/PIERB24061902 | Google Scholar

Abstract
Sparse arrays have the technical advantages of large equivalent aperture, high degrees of freedom (DOFs), and low mutual coupling leakage. In this article, a novel symmetric sparse array, termed as symmetric shifted coprime array (SSCA), is proposed for the localization of both the far field and near-field of sources. It can be generated in two steps. Firstly, the second subarray of the traditional coprime array is shifted by a appropriate distance, and secondly, the entire array is flipped. By translating, the proposed array provides increased DOFs and enhanced ability to resist heavy levels of mutual coupling. Meanwhile, the symmetric structure of the array can be ensured by flipping to solve the parameter estimation of mixed fields. We provide an analytical expression for the proposed array and also derive its DOFs and weight functions. The first three weight functions of SSCA are equal to 2, indicating that the SSCA improves the ability to resist mutual coupling. Numerical results show that the proposed array is superior to existing sparse arrays for both direction of arrival (DOA) and range estimations.
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Citation
Yiming Guo, Tao Zang, Fengtong Mei, Qian Liu, and Linzi Li, "A Symmetric Shifted Coprime Array for Localization of Mixed Near Field and Far Field Sources: Reduced Mutual Coupling Effect," Progress In Electromagnetics Research B, Vol. 108, 61-73, 2024.
doi:10.2528/PIERB24061902
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