Abstract
In this paper, we investigate a cell-free massive MIMO system with both access points and user equipments equipped with multiple antennas over the Weichselberger Rayleigh fading channel. We study the uplink spectral efficiency (SE) based on a two-layer decoding structure with maximum ratio (MR) or local minimum mean-square error (MMSE) combining applied in the first layer and optimal large-scale fading decoding method implemented in the second layer, respectively. To maximize the weighted sum SE, an uplink precoding structure based on an Iteratively Weighted sum-MMSE (I-WMMSE) algorithm using only channel statistics is proposed. Furthermore, with MR combining applied in the first layer, we derive novel achievable SE expressions and optimal precoding structures in closed-form. Numerical results validate our proposed results and show that the I-WMMSE precoding can achieve excellent sum SE performance.
Original language | English |
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Title of host publication | ICC 2022: IEEE International Conference on Communications |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 231-236 |
Number of pages | 6 |
ISBN (Electronic) | 9781538683477 |
DOIs | |
Publication status | Published - 11 Aug 2022 |
Event | IEEE International Conference on Communications 2022 - Seoul, Korea, Republic of Duration: 16 May 2022 → 20 May 2022 https://icc2022.ieee-icc.org/ |
Publication series
Name | IEEE International Conference on Communications |
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Volume | 2022-May |
ISSN (Print) | 1550-3607 |
ISSN (Electronic) | 1938-1883 |
Conference
Conference | IEEE International Conference on Communications 2022 |
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Abbreviated title | IEEE ICC 2023 |
Country/Territory | Korea, Republic of |
City | Seoul |
Period | 16/05/2022 → 20/05/2022 |
Internet address |
Bibliographical note
Funding Information:This work was supported in part by National Key R&D Program of China under Grant 2020YFB1807201, in part by National Natural Science Foundation of China under Grants 61971027, and 61961130391, in part by Beijing Natural Science Foundation under Grant L202013, in part by Natural Science Foundation of Jiangsu Province, Major Project under Grant BK20212002, in part by the Royal Society Newton Advanced Fellowship under Grant NA191006, in part by Frontiers Science Center for Smart High-speed Railway System.
Publisher Copyright:
© 2022 IEEE.
ASJC Scopus subject areas
- Computer Networks and Communications
- Electrical and Electronic Engineering