Sparse Array Design Methods via Redundancy Analysis of Coprime Array

ZHANG Yule; ZHOU Hao; HU Guoping; SHI Junpeng; ZHENG Guimei; SONG Yuwei

doi:10.11999/JEIT240348

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ZHANG Yule, ZHOU Hao, HU Guoping, SHI Junpeng, ZHENG Guimei, SONG Yuwei. Sparse Array Design Methods via Redundancy Analysis of Coprime Array[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT240348

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ZHANG Yule, ZHOU Hao, HU Guoping, SHI Junpeng, ZHENG Guimei, SONG Yuwei. Sparse Array Design Methods via Redundancy Analysis of Coprime Array[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT240348

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Sparse Array Design Methods via Redundancy Analysis of Coprime Array

doi: 10.11999/JEIT240348

1.
Graduate College, Aire Force Engineering University, Xi’an 710051, China
2.
Air and Missile Defense College, Aire Force Engineering University, Xi’an 710051, China
3.
College of Electronic Engineering, National University of Defense Technology, Hefei 230037 China

Funds: The National Natural Science Foundation of China (62071476), China Postdoctoral Science Foundation (2022M723879)

Rev Recd Date: 2024-12-09

Available Online: 2024-12-12

Abstract

Abstract

The coprime array has garnered noticeable attention due to the reduced mutual coupling, but the alternately deployed subarrays limit the enhancement of consecutive degrees of freedom to some extent. To address this deficiency, two types of Coprime Array with Translated Subarray (CATrS) are presented based on the analysis of the conditions for generating redundant virtual arrays in the cross-difference sets. Firstly, the subarray is shifted to an appropriate location to optimize the array geometry, and then the displacement distance is analyzed. Subsequently, the closed-form expressions for the degrees of freedom, consecutive degrees of freedom, hole positions, and weight functions of CATrS are derived. Theoretical analysis indicates that CATrS can effectively increase both the number of degrees of freedom and consecutive degrees of freedom, while suppress the mutual coupling without altering the number of physical sensors. Finally, the superiorities of CATrS in direction of arrival estimation are verified through simulation experiments.
- Direction of arrival estimation,
- Coprime array with translated subarray,
- Degrees of freedom,
- Mutual coupling

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References(21)

References

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