DOA Estimation of an Enhanced Generalized Nested Array with Increased Degrees of Freedom and Reduced Mutual Coupling
Aiming at low degrees of freedom (DOF) and high mutual coupling (MC) of the existing sparse arrays, an enhanced generalized nested array (EGNA) is proposed in this paper. Specifically, the proposed array adds a single antenna on the basis of generalized nested array (GNA), and the difference of copr...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2021/7233651 |
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| author | Yule Zhang Guoping Hu Junpeng Shi Hao Zhou Chenghong Zhan Fangzheng Zhao |
| author_facet | Yule Zhang Guoping Hu Junpeng Shi Hao Zhou Chenghong Zhan Fangzheng Zhao |
| author_sort | Yule Zhang |
| collection | DOAJ |
| description | Aiming at low degrees of freedom (DOF) and high mutual coupling (MC) of the existing sparse arrays, an enhanced generalized nested array (EGNA) is proposed in this paper. Specifically, the proposed array adds a single antenna on the basis of generalized nested array (GNA), and the difference of coprime factors is employed as the spacing between the second subarray and the additional antenna. Then, the values of the coprime factors are analyzed in detail, which indicates that Yang-NA can be explained as a special case. Compared with the majority of the existing sparse arrays, EGNA not only has the closed-form expressions of the physical antenna locations, consecutive lags, and unique lags, but also significantly increases DOF and reduces MC. In view of the above advantages, EGNA can obtain superior performance in direction of arrival (DOA) estimation. Numerical simulation results verify the rationality and superiority of the proposed nested array. |
| format | Article |
| id | doaj-art-ccc1e84d597a485e91817bb200173d60 |
| institution | Kabale University |
| issn | 1687-5869 1687-5877 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-ccc1e84d597a485e91817bb200173d602025-02-03T07:24:22ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772021-01-01202110.1155/2021/72336517233651DOA Estimation of an Enhanced Generalized Nested Array with Increased Degrees of Freedom and Reduced Mutual CouplingYule Zhang0Guoping Hu1Junpeng Shi2Hao Zhou3Chenghong Zhan4Fangzheng Zhao5Graduate College, Air Force Engineering University, Xi’an 710051, ChinaAir and Missile Defense College, Air Force Engineering University, Xi’an 710051, ChinaCollege of Electronic Countermeasure, National University of Defense Technology, Hefei 230037, ChinaAir and Missile Defense College, Air Force Engineering University, Xi’an 710051, ChinaGraduate College, Air Force Engineering University, Xi’an 710051, ChinaGraduate College, Air Force Engineering University, Xi’an 710051, ChinaAiming at low degrees of freedom (DOF) and high mutual coupling (MC) of the existing sparse arrays, an enhanced generalized nested array (EGNA) is proposed in this paper. Specifically, the proposed array adds a single antenna on the basis of generalized nested array (GNA), and the difference of coprime factors is employed as the spacing between the second subarray and the additional antenna. Then, the values of the coprime factors are analyzed in detail, which indicates that Yang-NA can be explained as a special case. Compared with the majority of the existing sparse arrays, EGNA not only has the closed-form expressions of the physical antenna locations, consecutive lags, and unique lags, but also significantly increases DOF and reduces MC. In view of the above advantages, EGNA can obtain superior performance in direction of arrival (DOA) estimation. Numerical simulation results verify the rationality and superiority of the proposed nested array.http://dx.doi.org/10.1155/2021/7233651 |
| spellingShingle | Yule Zhang Guoping Hu Junpeng Shi Hao Zhou Chenghong Zhan Fangzheng Zhao DOA Estimation of an Enhanced Generalized Nested Array with Increased Degrees of Freedom and Reduced Mutual Coupling International Journal of Antennas and Propagation |
| title | DOA Estimation of an Enhanced Generalized Nested Array with Increased Degrees of Freedom and Reduced Mutual Coupling |
| title_full | DOA Estimation of an Enhanced Generalized Nested Array with Increased Degrees of Freedom and Reduced Mutual Coupling |
| title_fullStr | DOA Estimation of an Enhanced Generalized Nested Array with Increased Degrees of Freedom and Reduced Mutual Coupling |
| title_full_unstemmed | DOA Estimation of an Enhanced Generalized Nested Array with Increased Degrees of Freedom and Reduced Mutual Coupling |
| title_short | DOA Estimation of an Enhanced Generalized Nested Array with Increased Degrees of Freedom and Reduced Mutual Coupling |
| title_sort | doa estimation of an enhanced generalized nested array with increased degrees of freedom and reduced mutual coupling |
| url | http://dx.doi.org/10.1155/2021/7233651 |
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