Channel Estimation and Hybrid Precoding for Millimeter-Wave MIMO Systems: A Low-Complexity Overall Solution
To enable multi-stream transmission and increase the achievable rate, a hybrid digital/analog precoding structure is usually adopted in millimeter-wave (mmWave) MIMO systems. However, it may require matrix operations with a scale of antenna size, which is generally large in mmWave communications. Mo...
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| Format: | Article |
| Language: | English |
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IEEE
2017-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/7971927/ |
| _version_ | 1818927667880132608 |
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| author | Zhenyu Xiao Pengfei Xia Xiang-Gen Xia |
| author_facet | Zhenyu Xiao Pengfei Xia Xiang-Gen Xia |
| author_sort | Zhenyu Xiao |
| collection | DOAJ |
| description | To enable multi-stream transmission and increase the achievable rate, a hybrid digital/analog precoding structure is usually adopted in millimeter-wave (mmWave) MIMO systems. However, it may require matrix operations with a scale of antenna size, which is generally large in mmWave communications. Moreover, the channel estimation is also rather time-consuming due to the large number of antennas at both Tx/Rx sides. In this paper, a low-complexity overall channel estimation and hybrid precoding approach is proposed. In the channel estimation phase, a hierarchical multi-beam search scheme is proposed to fast acquire NS (the number of streams) multipath components (MPCs)/clusters with the highest powers. In the hybrid precoding phase, the analog and digital precodings are decoupled. The analog precoding is designed to steer along the NS acquired MPCs/clusters at both Tx/Rx sides, shaping an NS × NS baseband effective channel, while the digital precoding is performed in the baseband with the reduced-scale effective channel. Performance evaluations show that, compared with the state-of-the-art scheme, while achieving a close or even better performance when the number of radio frequency chains or streams is small, both the time complexity of the channel estimation and the computational complexity of the hybrid precoding are reduced. |
| first_indexed | 2024-12-20T03:16:40Z |
| format | Article |
| id | doaj.art-a4a12fe18b144b16b92711cf38ce1a4a |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-20T03:16:40Z |
| publishDate | 2017-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-a4a12fe18b144b16b92711cf38ce1a4a2022-12-21T19:55:20ZengIEEEIEEE Access2169-35362017-01-015161001611010.1109/ACCESS.2017.27240377971927Channel Estimation and Hybrid Precoding for Millimeter-Wave MIMO Systems: A Low-Complexity Overall SolutionZhenyu Xiao0https://orcid.org/0000-0002-4884-542XPengfei Xia1Xiang-Gen Xia2School of Electronic and Information Engineering, Beihang University, Beijing, ChinaKey Laboratory of Embedded System and Service Computing, School of Electronics and Information Engineering, Tongji University, Shanghai, ChinaCollege of Information Engineering, Shenzhen University, Shenzhen, ChinaTo enable multi-stream transmission and increase the achievable rate, a hybrid digital/analog precoding structure is usually adopted in millimeter-wave (mmWave) MIMO systems. However, it may require matrix operations with a scale of antenna size, which is generally large in mmWave communications. Moreover, the channel estimation is also rather time-consuming due to the large number of antennas at both Tx/Rx sides. In this paper, a low-complexity overall channel estimation and hybrid precoding approach is proposed. In the channel estimation phase, a hierarchical multi-beam search scheme is proposed to fast acquire NS (the number of streams) multipath components (MPCs)/clusters with the highest powers. In the hybrid precoding phase, the analog and digital precodings are decoupled. The analog precoding is designed to steer along the NS acquired MPCs/clusters at both Tx/Rx sides, shaping an NS × NS baseband effective channel, while the digital precoding is performed in the baseband with the reduced-scale effective channel. Performance evaluations show that, compared with the state-of-the-art scheme, while achieving a close or even better performance when the number of radio frequency chains or streams is small, both the time complexity of the channel estimation and the computational complexity of the hybrid precoding are reduced.https://ieeexplore.ieee.org/document/7971927/Hybrid precodingmillimeter-wavemmWavemmWave MIMObeam searchhierarchical search |
| spellingShingle | Zhenyu Xiao Pengfei Xia Xiang-Gen Xia Channel Estimation and Hybrid Precoding for Millimeter-Wave MIMO Systems: A Low-Complexity Overall Solution IEEE Access Hybrid precoding millimeter-wave mmWave mmWave MIMO beam search hierarchical search |
| title | Channel Estimation and Hybrid Precoding for Millimeter-Wave MIMO Systems: A Low-Complexity Overall Solution |
| title_full | Channel Estimation and Hybrid Precoding for Millimeter-Wave MIMO Systems: A Low-Complexity Overall Solution |
| title_fullStr | Channel Estimation and Hybrid Precoding for Millimeter-Wave MIMO Systems: A Low-Complexity Overall Solution |
| title_full_unstemmed | Channel Estimation and Hybrid Precoding for Millimeter-Wave MIMO Systems: A Low-Complexity Overall Solution |
| title_short | Channel Estimation and Hybrid Precoding for Millimeter-Wave MIMO Systems: A Low-Complexity Overall Solution |
| title_sort | channel estimation and hybrid precoding for millimeter wave mimo systems a low complexity overall solution |
| topic | Hybrid precoding millimeter-wave mmWave mmWave MIMO beam search hierarchical search |
| url | https://ieeexplore.ieee.org/document/7971927/ |
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