Underdetermined direction of arrival estimation with nonuniform linear motion sampling based on a small unmanned aerial vehicle platform
Uniform linear array (ULA) radars are widely used in the collision-avoidance radar systems of small unmanned aerial vehicles (UAVs). In practice, a ULA’s multi-target direction of arrival (DOA) estimation performance suffers from significant performance degradation owing to the limited number of phy...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2024-03-01
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| Series: | Defence Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214914723001630 |
| _version_ | 1797238051691298816 |
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| author | Xinwei Wang Xiaopeng Yan Tai An Qile Chen Dingkun Huang |
| author_facet | Xinwei Wang Xiaopeng Yan Tai An Qile Chen Dingkun Huang |
| author_sort | Xinwei Wang |
| collection | DOAJ |
| description | Uniform linear array (ULA) radars are widely used in the collision-avoidance radar systems of small unmanned aerial vehicles (UAVs). In practice, a ULA’s multi-target direction of arrival (DOA) estimation performance suffers from significant performance degradation owing to the limited number of physical elements. To improve the underdetermined DOA estimation performance of a ULA radar mounted on a small UAV platform, we propose a nonuniform linear motion sampling underdetermined DOA estimation method. Using the motion of the UAV platform, the echo signal is sampled at different positions. Then, according to the concept of difference co-array, a virtual ULA with multiple array elements and a large aperture is synthesized to increase the degrees of freedom (DOFs). Through position analysis of the original and motion arrays, we propose a nonuniform linear motion sampling method based on ULA for determining the optimal DOFs. Under the condition of no increase in the aperture of the physical array, the proposed method obtains a high DOF with fewer sampling runs and greatly improves the underdetermined DOA estimation performance of ULA. The results of numerical simulations conducted herein verify the superior performance of the proposed method. |
| first_indexed | 2024-04-24T17:29:30Z |
| format | Article |
| id | doaj.art-8a8d26f4bf4a4795a24b634363675cf6 |
| institution | Directory Open Access Journal |
| issn | 2214-9147 |
| language | English |
| last_indexed | 2024-04-24T17:29:30Z |
| publishDate | 2024-03-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Defence Technology |
| spelling | doaj.art-8a8d26f4bf4a4795a24b634363675cf62024-03-28T06:37:57ZengKeAi Communications Co., Ltd.Defence Technology2214-91472024-03-0133352363Underdetermined direction of arrival estimation with nonuniform linear motion sampling based on a small unmanned aerial vehicle platformXinwei Wang0Xiaopeng Yan1Tai An2Qile Chen3Dingkun Huang4Science and Technology on Electromechanical Dynamic Control Laboratory, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, ChinaCorresponding author.; Science and Technology on Electromechanical Dynamic Control Laboratory, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, ChinaScience and Technology on Electromechanical Dynamic Control Laboratory, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, ChinaScience and Technology on Electromechanical Dynamic Control Laboratory, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, ChinaScience and Technology on Electromechanical Dynamic Control Laboratory, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, ChinaUniform linear array (ULA) radars are widely used in the collision-avoidance radar systems of small unmanned aerial vehicles (UAVs). In practice, a ULA’s multi-target direction of arrival (DOA) estimation performance suffers from significant performance degradation owing to the limited number of physical elements. To improve the underdetermined DOA estimation performance of a ULA radar mounted on a small UAV platform, we propose a nonuniform linear motion sampling underdetermined DOA estimation method. Using the motion of the UAV platform, the echo signal is sampled at different positions. Then, according to the concept of difference co-array, a virtual ULA with multiple array elements and a large aperture is synthesized to increase the degrees of freedom (DOFs). Through position analysis of the original and motion arrays, we propose a nonuniform linear motion sampling method based on ULA for determining the optimal DOFs. Under the condition of no increase in the aperture of the physical array, the proposed method obtains a high DOF with fewer sampling runs and greatly improves the underdetermined DOA estimation performance of ULA. The results of numerical simulations conducted herein verify the superior performance of the proposed method.http://www.sciencedirect.com/science/article/pii/S2214914723001630Unmanned aerial vehicle (UAV)Uniform linear array (ULA)Direction of arrival (DOA)Difference co-arrayNonuniform linear motion sampling method |
| spellingShingle | Xinwei Wang Xiaopeng Yan Tai An Qile Chen Dingkun Huang Underdetermined direction of arrival estimation with nonuniform linear motion sampling based on a small unmanned aerial vehicle platform Defence Technology Unmanned aerial vehicle (UAV) Uniform linear array (ULA) Direction of arrival (DOA) Difference co-array Nonuniform linear motion sampling method |
| title | Underdetermined direction of arrival estimation with nonuniform linear motion sampling based on a small unmanned aerial vehicle platform |
| title_full | Underdetermined direction of arrival estimation with nonuniform linear motion sampling based on a small unmanned aerial vehicle platform |
| title_fullStr | Underdetermined direction of arrival estimation with nonuniform linear motion sampling based on a small unmanned aerial vehicle platform |
| title_full_unstemmed | Underdetermined direction of arrival estimation with nonuniform linear motion sampling based on a small unmanned aerial vehicle platform |
| title_short | Underdetermined direction of arrival estimation with nonuniform linear motion sampling based on a small unmanned aerial vehicle platform |
| title_sort | underdetermined direction of arrival estimation with nonuniform linear motion sampling based on a small unmanned aerial vehicle platform |
| topic | Unmanned aerial vehicle (UAV) Uniform linear array (ULA) Direction of arrival (DOA) Difference co-array Nonuniform linear motion sampling method |
| url | http://www.sciencedirect.com/science/article/pii/S2214914723001630 |
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