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Dual-Sparse Parallel Nested Array for Two-Dimensional Direction of Arrival Estimation

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Abstract

In this paper, a novel dual-sparse parallel nested array (DS-PNA) is proposed for high-accuracy two-dimensional (2D) direction of arrival (DOA) estimation. The DS-PNA contains three subarrays, and the inter-antenna spacings of subarrays and those between subarrays are all enlarged with specific rates in 2D space (both of which are far larger than half-wavelength), for mutual coupling reduction and array aperture extension in physical array domain. Based on it, there is a systematic procedure to determine the number and positions of antennas in each subarray to achieve the maximum degrees of freedom in difference coarray domain, for improving the performance of DOA estimation. Numerical results are provided to demonstrate the superior performance of the DS-PNA for 2D DOA estimation over the state-of-the-art approaches, in the case of practical mutual coupling model.

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Acknowledgements

This work was supported by the National Natural Science Foundations of China under Grant 62101190 and Grant 62301141, the Natural Science Foundation of Shanghai under Grant 21ZR1416800, and the Fundamental Research Funds for the Central Universities under Grant 2232021D-40.

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Correspondence to Guojun Jiang or Yunlong Yang.

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Jiang, G., Huang, J. & Yang, Y. Dual-Sparse Parallel Nested Array for Two-Dimensional Direction of Arrival Estimation. Circuits Syst Signal Process 43, 8060–8073 (2024). https://doi.org/10.1007/s00034-024-02816-w

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