Near-Field Beam Training in Terahertz Communications with Hybrid Beamforming Architecture
Terahertz (THz) communication has a large available bandwidth, which is expected to be deployed in future communication networks. As THz wave suffers from severe propagation loss in wireless transmission, we consider a THz near-field scenario where a base station (BS) is equipped with a large-scale...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/14/4/880 |
| _version_ | 1797604253329522688 |
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| author | Yuxin Xie Boyu Ning Lingxiang Li Zhi Chen |
| author_facet | Yuxin Xie Boyu Ning Lingxiang Li Zhi Chen |
| author_sort | Yuxin Xie |
| collection | DOAJ |
| description | Terahertz (THz) communication has a large available bandwidth, which is expected to be deployed in future communication networks. As THz wave suffers from severe propagation loss in wireless transmission, we consider a THz near-field scenario where a base station (BS) is equipped with a large-scale antenna array with a low-cost hybrid beamforming architecture to serve mobile users nearby. However, the large-scale array and the user mobility incur difficulty in channel estimation. To tackle this issue, we propose a near-field beam training scheme that can align a beam to the user in a fast way by searching the codebook. Specifically, the BS employs a uniform circular array (UCA), and the radiation pattern of the beams in our proposed codebook appears as ellipsoids. To cover the serving zone with the minimum codebook size, we develop a near-field codebook by tangent arrangement approach (TAA). To reduce the time overhead, we leverage the hybrid beamforming architecture to realize multi-beam training concurrently since each RF chain can enable a codeword whose element has a constant magnitude. Numerical results validate that our proposed UCA near-field codebook achieves less time cost while achieving a comparable coverage performance compared to the conventional near-field codebook. |
| first_indexed | 2024-03-11T04:43:42Z |
| format | Article |
| id | doaj.art-94d68055f8464f959063d21d4ad12858 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-11T04:43:42Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-94d68055f8464f959063d21d4ad128582023-11-17T20:30:42ZengMDPI AGMicromachines2072-666X2023-04-0114488010.3390/mi14040880Near-Field Beam Training in Terahertz Communications with Hybrid Beamforming ArchitectureYuxin Xie0Boyu Ning1Lingxiang Li2Zhi Chen3The National Key Laboratory on Wireless Communications, University of Electronic Science and Technology of China, Chengdu 611731, ChinaThe National Key Laboratory on Wireless Communications, University of Electronic Science and Technology of China, Chengdu 611731, ChinaThe National Key Laboratory on Wireless Communications, University of Electronic Science and Technology of China, Chengdu 611731, ChinaThe National Key Laboratory on Wireless Communications, University of Electronic Science and Technology of China, Chengdu 611731, ChinaTerahertz (THz) communication has a large available bandwidth, which is expected to be deployed in future communication networks. As THz wave suffers from severe propagation loss in wireless transmission, we consider a THz near-field scenario where a base station (BS) is equipped with a large-scale antenna array with a low-cost hybrid beamforming architecture to serve mobile users nearby. However, the large-scale array and the user mobility incur difficulty in channel estimation. To tackle this issue, we propose a near-field beam training scheme that can align a beam to the user in a fast way by searching the codebook. Specifically, the BS employs a uniform circular array (UCA), and the radiation pattern of the beams in our proposed codebook appears as ellipsoids. To cover the serving zone with the minimum codebook size, we develop a near-field codebook by tangent arrangement approach (TAA). To reduce the time overhead, we leverage the hybrid beamforming architecture to realize multi-beam training concurrently since each RF chain can enable a codeword whose element has a constant magnitude. Numerical results validate that our proposed UCA near-field codebook achieves less time cost while achieving a comparable coverage performance compared to the conventional near-field codebook.https://www.mdpi.com/2072-666X/14/4/880terahertz communicationnear-fieldhybrid beamformingbeam trainingtangent arrangement |
| spellingShingle | Yuxin Xie Boyu Ning Lingxiang Li Zhi Chen Near-Field Beam Training in Terahertz Communications with Hybrid Beamforming Architecture Micromachines terahertz communication near-field hybrid beamforming beam training tangent arrangement |
| title | Near-Field Beam Training in Terahertz Communications with Hybrid Beamforming Architecture |
| title_full | Near-Field Beam Training in Terahertz Communications with Hybrid Beamforming Architecture |
| title_fullStr | Near-Field Beam Training in Terahertz Communications with Hybrid Beamforming Architecture |
| title_full_unstemmed | Near-Field Beam Training in Terahertz Communications with Hybrid Beamforming Architecture |
| title_short | Near-Field Beam Training in Terahertz Communications with Hybrid Beamforming Architecture |
| title_sort | near field beam training in terahertz communications with hybrid beamforming architecture |
| topic | terahertz communication near-field hybrid beamforming beam training tangent arrangement |
| url | https://www.mdpi.com/2072-666X/14/4/880 |
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