New sparse array for non‐circular sources with increased degrees of freedom
Abstract Recently, sparse arrays have received considerable attention as they provide larger array aperture and increased degrees‐of‐freedom (DOFs) compared to uniform linear arrays. These features are essential to enhance the direction‐of‐arrival estimation performance. However, most of the existin...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-04-01
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| Series: | Electronics Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1049/ell2.12000 |
| _version_ | 1818051047858372608 |
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| author | Abdul Hayee Shaikh Xiaoyu Dang Imran. A. Khoso Daqing Huang |
| author_facet | Abdul Hayee Shaikh Xiaoyu Dang Imran. A. Khoso Daqing Huang |
| author_sort | Abdul Hayee Shaikh |
| collection | DOAJ |
| description | Abstract Recently, sparse arrays have received considerable attention as they provide larger array aperture and increased degrees‐of‐freedom (DOFs) compared to uniform linear arrays. These features are essential to enhance the direction‐of‐arrival estimation performance. However, most of the existing sparse arrays are mainly designed for circular sources and realize limited increment in DOFs for non‐circular sources. In this letter, a new sparse array configuration for non‐circular sources is presented, which significantly increases the achievable DOFs and improves the direction‐of‐arrival estimation performance. The proposed geometry comprises two effectively configured uniform linear arrays that exploit the characteristics of non‐circular sources and extend the array aperture. For a given number of sensors, its virtual array is advantageously a hole‐free uniform linear array. Moreover, the precise sensor locations, achievable DOFs, and optimal distribution of physical sensors are determined analytically by closed‐form expressions. Owing to these benefits, the proposed array efficiently resolve multiple sources in under‐determined conditions and achieves better direction‐of‐arrival estimation performance than its counterpart structures. Simulation results validate the superiority of the proposed configuration. |
| first_indexed | 2024-12-10T11:03:10Z |
| format | Article |
| id | doaj.art-e71f611f8a27448b93723e51fdfd3fe3 |
| institution | Directory Open Access Journal |
| issn | 0013-5194 1350-911X |
| language | English |
| last_indexed | 2024-12-10T11:03:10Z |
| publishDate | 2021-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Electronics Letters |
| spelling | doaj.art-e71f611f8a27448b93723e51fdfd3fe32022-12-22T01:51:38ZengWileyElectronics Letters0013-51941350-911X2021-04-0157833934210.1049/ell2.12000New sparse array for non‐circular sources with increased degrees of freedomAbdul Hayee Shaikh0Xiaoyu Dang1Imran. A. Khoso2Daqing Huang3College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Nanjing ChinaCollege of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Nanjing ChinaCollege of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Nanjing ChinaCollege of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Nanjing ChinaAbstract Recently, sparse arrays have received considerable attention as they provide larger array aperture and increased degrees‐of‐freedom (DOFs) compared to uniform linear arrays. These features are essential to enhance the direction‐of‐arrival estimation performance. However, most of the existing sparse arrays are mainly designed for circular sources and realize limited increment in DOFs for non‐circular sources. In this letter, a new sparse array configuration for non‐circular sources is presented, which significantly increases the achievable DOFs and improves the direction‐of‐arrival estimation performance. The proposed geometry comprises two effectively configured uniform linear arrays that exploit the characteristics of non‐circular sources and extend the array aperture. For a given number of sensors, its virtual array is advantageously a hole‐free uniform linear array. Moreover, the precise sensor locations, achievable DOFs, and optimal distribution of physical sensors are determined analytically by closed‐form expressions. Owing to these benefits, the proposed array efficiently resolve multiple sources in under‐determined conditions and achieves better direction‐of‐arrival estimation performance than its counterpart structures. Simulation results validate the superiority of the proposed configuration.https://doi.org/10.1049/ell2.12000Antenna arraysSignal processing and detection |
| spellingShingle | Abdul Hayee Shaikh Xiaoyu Dang Imran. A. Khoso Daqing Huang New sparse array for non‐circular sources with increased degrees of freedom Electronics Letters Antenna arrays Signal processing and detection |
| title | New sparse array for non‐circular sources with increased degrees of freedom |
| title_full | New sparse array for non‐circular sources with increased degrees of freedom |
| title_fullStr | New sparse array for non‐circular sources with increased degrees of freedom |
| title_full_unstemmed | New sparse array for non‐circular sources with increased degrees of freedom |
| title_short | New sparse array for non‐circular sources with increased degrees of freedom |
| title_sort | new sparse array for non circular sources with increased degrees of freedom |
| topic | Antenna arrays Signal processing and detection |
| url | https://doi.org/10.1049/ell2.12000 |
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