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An Unambiguous 2D DOA Estimation Algorithm by a Large-Space L-Shaped Array

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Abstract

In this paper, an unambiguous two-dimensional (2D) direction of arrival (DOA) estimation algorithm based on a large-space L-shaped array is proposed. The proposed L-shaped array is composed of two large-space linear arrays. Each linear array consists of two uniform linear arrays with internal element spacing being larger than half wavelength of incident signal. Firstly, an unambiguous modified estimation of signal parameter via rotational invariance techniques (ESPRIT) algorithm is proposed to estimate the elevation angles. Then, using the estimated elevation angles, automatically matched azimuth angles can be estimated. On account of the adjustable element spacing, the proposed array is robust to mutual coupling effect. Moreover, simulation results can prove that the proposed algorithm has higher estimation accuracy than many similar 2D DOA estimation algorithms based on L-shaped array.

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Code Availability

The codes used to perform simulation experiments are available from the authors.

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Funding

This work was supported by the National Natural Science Foundation of China (62261047, 62066040), the Science and Technology Foundation of Guizhou Province of China (ZK[2022]557, [2020]1Y004), the Natural Science Foundation of Chongqing (cstc2021jcyj-bsh0198) and Tongren science and technology planning project ([2022]59) and Guizhou Provincial Education Department Youth Science and Technology Talent Development Project(KY[2019]177).

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Author notes

  1. Zhao Jing contributed equally to this work.

Authors and Affiliations

  1. School of Data Science, Tongren University, 238 Qihang Road, Tongren, 554300, Guizhou, China

    Liu Sheng, Zhao Jing, Huang Yiwang & Xia Linli

  2. School of Automation, Chongqing University of Posts and Telecommunications, Chongqing, 400065, Chongqing, China

    Wu Decheng

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  1. Liu Sheng
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  2. Zhao Jing
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  3. Wu Decheng
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  4. Huang Yiwang
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  5. Xia Linli
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Correspondence to Zhao Jing or Wu Decheng.

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Sheng, L., Jing, Z., Decheng, W. et al. An Unambiguous 2D DOA Estimation Algorithm by a Large-Space L-Shaped Array. Circuits Syst Signal Process 42, 6614–6635 (2023). https://doi.org/10.1007/s00034-023-02405-3

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