A coarray processing technique for nested vector-sensor arrays with improved resolution capabilities
In this paper, we propose a new coarray processing technique for nested electromagnetic vector-sensor (EMVS) arrays. Vector-sensors by providing multi-component measurements of the incident waves offer additional information over the common single-output scalar sensors. The current paper takes the a...
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| Published in: | Digital signal processing Vol. 130; p. 103715 |
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| Main Authors: | , |
| Format: | Journal Article |
| Language: | English |
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Elsevier Inc
01.10.2022
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| ISSN: | 1051-2004, 1095-4333 |
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| Abstract | In this paper, we propose a new coarray processing technique for nested electromagnetic vector-sensor (EMVS) arrays. Vector-sensors by providing multi-component measurements of the incident waves offer additional information over the common single-output scalar sensors. The current paper takes the advantage of the multi-component measurements of vector-sensors combined with the elegant nested array strategy to design a new coarray processing technique. In this way, we utilize the auto/cross-correlation matrices of the underlying subarrays of the nested EMVS array to serve as snapshots in the coarray domain. Then, we apply two levels of spatial and temporal smoothing procedure to recover the rank of the model and also improve the covariance matrix estimation in the difference coarray domain. The proposed method can provide O(N2) degrees of freedom (DOFs) with only N physical EMVSs. The effectiveness of the proposed coarray processing technique is demonstrated through several simulation examples. Simulation results show that the proposed technique provides superior resolution capabilities and more accurate DOA estimates in the asymptotic region compared to the other counterparts. Moreover, the proposed method requires relatively less computational efforts among the other methods. |
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| AbstractList | In this paper, we propose a new coarray processing technique for nested electromagnetic vector-sensor (EMVS) arrays. Vector-sensors by providing multi-component measurements of the incident waves offer additional information over the common single-output scalar sensors. The current paper takes the advantage of the multi-component measurements of vector-sensors combined with the elegant nested array strategy to design a new coarray processing technique. In this way, we utilize the auto/cross-correlation matrices of the underlying subarrays of the nested EMVS array to serve as snapshots in the coarray domain. Then, we apply two levels of spatial and temporal smoothing procedure to recover the rank of the model and also improve the covariance matrix estimation in the difference coarray domain. The proposed method can provide O(N2) degrees of freedom (DOFs) with only N physical EMVSs. The effectiveness of the proposed coarray processing technique is demonstrated through several simulation examples. Simulation results show that the proposed technique provides superior resolution capabilities and more accurate DOA estimates in the asymptotic region compared to the other counterparts. Moreover, the proposed method requires relatively less computational efforts among the other methods. |
| ArticleNumber | 103715 |
| Author | Sakhaei, Sayed Mahmoud Jamshidpour, Sadegh |
| Author_xml | – sequence: 1 givenname: Sadegh surname: Jamshidpour fullname: Jamshidpour, Sadegh email: s.jamshidpour@stu.nit.ac.ir – sequence: 2 givenname: Sayed Mahmoud surname: Sakhaei fullname: Sakhaei, Sayed Mahmoud email: smsakhaei@nit.ac.ir |
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| Keywords | Spatial smoothing Direction of arrival (DOA) estimation Electromagnetic vector-sensor (EMVS) Coarray processing Nested arrays |
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| SubjectTerms | Coarray processing Direction of arrival (DOA) estimation Electromagnetic vector-sensor (EMVS) Nested arrays Spatial smoothing |
| Title | A coarray processing technique for nested vector-sensor arrays with improved resolution capabilities |
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