Harmonic Frequency Enhanced Direction of Arrival Estimation Using Non-Uniform Linear Arrays
This article introduces an innovative method to improve the accuracy of estimating the Direction of Arrival (DOA) by utilizing non-uniform linear arrays (NULAs) operating at harmonic frequencies. Common DOA techniques face challenges in maintaining sufficient degrees of freedom (DOFs) while minimizi...
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| Format: | Article |
| Language: | English |
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IEEE
2024-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10460570/ |
| _version_ | 1826938491922022400 |
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| author | Ruizhi Niu Zhenyu Zhang |
| author_facet | Ruizhi Niu Zhenyu Zhang |
| author_sort | Ruizhi Niu |
| collection | DOAJ |
| description | This article introduces an innovative method to improve the accuracy of estimating the Direction of Arrival (DOA) by utilizing non-uniform linear arrays (NULAs) operating at harmonic frequencies. Common DOA techniques face challenges in maintaining sufficient degrees of freedom (DOFs) while minimizing the number of sensors. Our approach takes advantage of the extended array aperture of NULAs and the diverse frequencies involved in harmonics to address these challenges. We explore various NULA structures, such as nested arrays, coprime arrays, and coprime arrays with compressed inter-element spacing (CACIS), each with unique characteristics and requirements for enhancing DOFs at the third and fifth harmonics. Simulation results demonstrate a substantial increase in DOFs, emphasizing the effectiveness and adaptability of our method in improving DOA estimation across different NULA configurations. This research contributes not only to theoretical advancements in antenna array processing but also offers practical insights, showcasing the potential of our method to significantly enhance DOA estimation accuracy in complex signal environments. |
| first_indexed | 2024-04-24T18:55:48Z |
| format | Article |
| id | doaj.art-fd540f3546844a0586a599318fd8c548 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2025-02-17T18:57:46Z |
| publishDate | 2024-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-fd540f3546844a0586a599318fd8c5482024-12-11T00:03:57ZengIEEEIEEE Access2169-35362024-01-0112369423695010.1109/ACCESS.2024.337346210460570Harmonic Frequency Enhanced Direction of Arrival Estimation Using Non-Uniform Linear ArraysRuizhi Niu0https://orcid.org/0009-0005-5884-3953Zhenyu Zhang1https://orcid.org/0000-0001-9370-1030Department of Electrical and Computer Engineering, University of Alberta, Edmonton, CanadaDepartment of Electrical and Computer Engineering, University of Alberta, Edmonton, CanadaThis article introduces an innovative method to improve the accuracy of estimating the Direction of Arrival (DOA) by utilizing non-uniform linear arrays (NULAs) operating at harmonic frequencies. Common DOA techniques face challenges in maintaining sufficient degrees of freedom (DOFs) while minimizing the number of sensors. Our approach takes advantage of the extended array aperture of NULAs and the diverse frequencies involved in harmonics to address these challenges. We explore various NULA structures, such as nested arrays, coprime arrays, and coprime arrays with compressed inter-element spacing (CACIS), each with unique characteristics and requirements for enhancing DOFs at the third and fifth harmonics. Simulation results demonstrate a substantial increase in DOFs, emphasizing the effectiveness and adaptability of our method in improving DOA estimation across different NULA configurations. This research contributes not only to theoretical advancements in antenna array processing but also offers practical insights, showcasing the potential of our method to significantly enhance DOA estimation accuracy in complex signal environments.https://ieeexplore.ieee.org/document/10460570/Array aperturecoprime arrayscoprime arrays with compressed inter-element spacing (CACIS)direction of arrival (DOA) estimationdegrees of freedom (DOFs)harmonic frequencies |
| spellingShingle | Ruizhi Niu Zhenyu Zhang Harmonic Frequency Enhanced Direction of Arrival Estimation Using Non-Uniform Linear Arrays IEEE Access Array aperture coprime arrays coprime arrays with compressed inter-element spacing (CACIS) direction of arrival (DOA) estimation degrees of freedom (DOFs) harmonic frequencies |
| title | Harmonic Frequency Enhanced Direction of Arrival Estimation Using Non-Uniform Linear Arrays |
| title_full | Harmonic Frequency Enhanced Direction of Arrival Estimation Using Non-Uniform Linear Arrays |
| title_fullStr | Harmonic Frequency Enhanced Direction of Arrival Estimation Using Non-Uniform Linear Arrays |
| title_full_unstemmed | Harmonic Frequency Enhanced Direction of Arrival Estimation Using Non-Uniform Linear Arrays |
| title_short | Harmonic Frequency Enhanced Direction of Arrival Estimation Using Non-Uniform Linear Arrays |
| title_sort | harmonic frequency enhanced direction of arrival estimation using non uniform linear arrays |
| topic | Array aperture coprime arrays coprime arrays with compressed inter-element spacing (CACIS) direction of arrival (DOA) estimation degrees of freedom (DOFs) harmonic frequencies |
| url | https://ieeexplore.ieee.org/document/10460570/ |
| work_keys_str_mv | AT ruizhiniu harmonicfrequencyenhanceddirectionofarrivalestimationusingnonuniformlineararrays AT zhenyuzhang harmonicfrequencyenhanceddirectionofarrivalestimationusingnonuniformlineararrays |