Clustering and Beamforming for User-Centric Cell-Free Massive MIMO With Backhaul Capacity Limitation
This paper addresses the joint design of a beamformer and user-centric clustering for scalable cell-free massive multiple-input multiple-output (CF-mMIMO) under severe quantization noise generated in backhaul links for central processing units (CPUs) cooperation. The system model comes up with a pla...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2024-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10373783/ |
| _version_ | 1797366819090071552 |
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| author | Masaaki Ito Shuto Fukue Kengo Ando Issei Kanno Kosuke Yamazaki Koji Ishibashi |
| author_facet | Masaaki Ito Shuto Fukue Kengo Ando Issei Kanno Kosuke Yamazaki Koji Ishibashi |
| author_sort | Masaaki Ito |
| collection | DOAJ |
| description | This paper addresses the joint design of a beamformer and user-centric clustering for scalable cell-free massive multiple-input multiple-output (CF-mMIMO) under severe quantization noise generated in backhaul links for central processing units (CPUs) cooperation. The system model comes up with a plan in which multiple CPUs exchange physical layer data under limited bandwidth to enhance performance while introducing clustering across multiple CPUs. We derive the joint optimization of the minimum mean-square error (MMSE) beamformer and user-centric clustering under quantization noise, and propose its low-complexity design. The superiority of our proposed design method is clarified by comparing its performance with cellular distributed MIMO systems. Throughout the paper, we first answer the problem of how much gain CF-mMIMO systems with multiple CPUs cooperation can obtain. |
| first_indexed | 2024-03-08T17:10:04Z |
| format | Article |
| id | doaj.art-b7648e27224249179bb83a94fa2f804e |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-03-08T17:10:04Z |
| publishDate | 2024-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-b7648e27224249179bb83a94fa2f804e2024-01-04T00:01:50ZengIEEEIEEE Access2169-35362024-01-011238239510.1109/ACCESS.2023.334690310373783Clustering and Beamforming for User-Centric Cell-Free Massive MIMO With Backhaul Capacity LimitationMasaaki Ito0https://orcid.org/0000-0002-7832-4406Shuto Fukue1https://orcid.org/0000-0002-1372-9875Kengo Ando2https://orcid.org/0000-0003-0905-2109Issei Kanno3Kosuke Yamazaki4Koji Ishibashi5https://orcid.org/0000-0002-7145-5622KDDI Research Inc., Fujimino, JapanAdvanced Wireless and Communication Research Center, The University of Electro-Communications, Chofu, Tokyo, JapanAdvanced Wireless and Communication Research Center, The University of Electro-Communications, Chofu, Tokyo, JapanKDDI Research Inc., Fujimino, JapanKDDI Research Inc., Fujimino, JapanAdvanced Wireless and Communication Research Center, The University of Electro-Communications, Chofu, Tokyo, JapanThis paper addresses the joint design of a beamformer and user-centric clustering for scalable cell-free massive multiple-input multiple-output (CF-mMIMO) under severe quantization noise generated in backhaul links for central processing units (CPUs) cooperation. The system model comes up with a plan in which multiple CPUs exchange physical layer data under limited bandwidth to enhance performance while introducing clustering across multiple CPUs. We derive the joint optimization of the minimum mean-square error (MMSE) beamformer and user-centric clustering under quantization noise, and propose its low-complexity design. The superiority of our proposed design method is clarified by comparing its performance with cellular distributed MIMO systems. Throughout the paper, we first answer the problem of how much gain CF-mMIMO systems with multiple CPUs cooperation can obtain.https://ieeexplore.ieee.org/document/10373783/6Gbackhaul capacity limitationcell-free massive MIMOdistributed MIMOmultiple CPUsuser-centric clustering |
| spellingShingle | Masaaki Ito Shuto Fukue Kengo Ando Issei Kanno Kosuke Yamazaki Koji Ishibashi Clustering and Beamforming for User-Centric Cell-Free Massive MIMO With Backhaul Capacity Limitation IEEE Access 6G backhaul capacity limitation cell-free massive MIMO distributed MIMO multiple CPUs user-centric clustering |
| title | Clustering and Beamforming for User-Centric Cell-Free Massive MIMO With Backhaul Capacity Limitation |
| title_full | Clustering and Beamforming for User-Centric Cell-Free Massive MIMO With Backhaul Capacity Limitation |
| title_fullStr | Clustering and Beamforming for User-Centric Cell-Free Massive MIMO With Backhaul Capacity Limitation |
| title_full_unstemmed | Clustering and Beamforming for User-Centric Cell-Free Massive MIMO With Backhaul Capacity Limitation |
| title_short | Clustering and Beamforming for User-Centric Cell-Free Massive MIMO With Backhaul Capacity Limitation |
| title_sort | clustering and beamforming for user centric cell free massive mimo with backhaul capacity limitation |
| topic | 6G backhaul capacity limitation cell-free massive MIMO distributed MIMO multiple CPUs user-centric clustering |
| url | https://ieeexplore.ieee.org/document/10373783/ |
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