An Oblique Projection-Based Beamforming Method for Coherent Signals Receiving
Within a complex sea or ground surface background, multipath signals are strongly correlated or even completely coherent, which leads to signal cancellation when conventional optimal beamforming is performed. Aiming at the above problem, a coherent signal-receiving algorithm is proposed based on obl...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/19/5043 |
| _version_ | 1797477044709228544 |
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| author | Yumei Guo Qiang Li Linrang Zhang Juan Zhang Zhanye Chen |
| author_facet | Yumei Guo Qiang Li Linrang Zhang Juan Zhang Zhanye Chen |
| author_sort | Yumei Guo |
| collection | DOAJ |
| description | Within a complex sea or ground surface background, multipath signals are strongly correlated or even completely coherent, which leads to signal cancellation when conventional optimal beamforming is performed. Aiming at the above problem, a coherent signal-receiving algorithm is proposed based on oblique projection technology in this paper. The direction of arrival (DOA) of incident signals is estimated firstly by the space smoothing-based MUSIC method. The composite steering vector of multipath coherent signals is then obtained utilizing the oblique projection matrix constructed with the estimated angles. The weight vector is thereby derived with the minimum variance distortionless response criteria. The proposed oblique projection-based beamformer can receive the multipath coherent signals effectively. Moreover, the proposed beamformer is more robust and converges to optimal beamformer rapidly without aperture loss. The theoretical analysis and simulation verify the validity and superiority of the proposed coherent signal beamformer. |
| first_indexed | 2024-03-09T21:12:22Z |
| format | Article |
| id | doaj.art-b63c0fdb1f6244529cd30a081ec6d28b |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T21:12:22Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-b63c0fdb1f6244529cd30a081ec6d28b2023-11-23T21:42:57ZengMDPI AGRemote Sensing2072-42922022-10-011419504310.3390/rs14195043An Oblique Projection-Based Beamforming Method for Coherent Signals ReceivingYumei Guo0Qiang Li1Linrang Zhang2Juan Zhang3Zhanye Chen4National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, ChinaHangzhou Institute of Technology, Xidian University, Hangzhou 311200, ChinaNational Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, ChinaNational Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, ChinaSchool of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, ChinaWithin a complex sea or ground surface background, multipath signals are strongly correlated or even completely coherent, which leads to signal cancellation when conventional optimal beamforming is performed. Aiming at the above problem, a coherent signal-receiving algorithm is proposed based on oblique projection technology in this paper. The direction of arrival (DOA) of incident signals is estimated firstly by the space smoothing-based MUSIC method. The composite steering vector of multipath coherent signals is then obtained utilizing the oblique projection matrix constructed with the estimated angles. The weight vector is thereby derived with the minimum variance distortionless response criteria. The proposed oblique projection-based beamformer can receive the multipath coherent signals effectively. Moreover, the proposed beamformer is more robust and converges to optimal beamformer rapidly without aperture loss. The theoretical analysis and simulation verify the validity and superiority of the proposed coherent signal beamformer.https://www.mdpi.com/2072-4292/14/19/5043sea or ground surfacemultipath signalssignal cancellationoptimal beamformingcoherent signal receivingDOA |
| spellingShingle | Yumei Guo Qiang Li Linrang Zhang Juan Zhang Zhanye Chen An Oblique Projection-Based Beamforming Method for Coherent Signals Receiving Remote Sensing sea or ground surface multipath signals signal cancellation optimal beamforming coherent signal receiving DOA |
| title | An Oblique Projection-Based Beamforming Method for Coherent Signals Receiving |
| title_full | An Oblique Projection-Based Beamforming Method for Coherent Signals Receiving |
| title_fullStr | An Oblique Projection-Based Beamforming Method for Coherent Signals Receiving |
| title_full_unstemmed | An Oblique Projection-Based Beamforming Method for Coherent Signals Receiving |
| title_short | An Oblique Projection-Based Beamforming Method for Coherent Signals Receiving |
| title_sort | oblique projection based beamforming method for coherent signals receiving |
| topic | sea or ground surface multipath signals signal cancellation optimal beamforming coherent signal receiving DOA |
| url | https://www.mdpi.com/2072-4292/14/19/5043 |
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