Weighted Sum-Rate Maximization for Reconfigurable Intelligent Surface Aided Wireless Networks
Reconfigurable intelligent surfaces (RIS) is a promising solution to build a programmable wireless environment via steering the incident signal in fully customizable ways with reconfigurable passive elements. In this paper, we consider a RIS-aided multiuser multiple-input single-output (MISO) downli...
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| Published in: | IEEE transactions on wireless communications Vol. 19; no. 5; pp. 3064 - 3076 |
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| Main Authors: | , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
New York
IEEE
01.05.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subjects: | |
| ISSN: | 1536-1276, 1558-2248, 1558-2248 |
| Online Access: | Get full text |
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| Abstract | Reconfigurable intelligent surfaces (RIS) is a promising solution to build a programmable wireless environment via steering the incident signal in fully customizable ways with reconfigurable passive elements. In this paper, we consider a RIS-aided multiuser multiple-input single-output (MISO) downlink communication system. Our objective is to maximize the weighted sum-rate (WSR) of all users by joint designing the beamforming at the access point (AP) and the phase vector of the RIS elements, while both the perfect channel state information (CSI) setup and the imperfect CSI setup are investigated. For perfect CSI setup, a low-complexity algorithm is proposed to obtain the stationary solution for the joint design problem by utilizing the fractional programming technique. Then, we resort to the stochastic successive convex approximation technique and extend the proposed algorithm to the scenario wherein the CSI is imperfect. The validity of the proposed methods is confirmed by numerical results. In particular, the proposed algorithm performs quite well when the channel uncertainty is smaller than 10%. |
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| AbstractList | Reconfigurable intelligent surfaces (RIS) is a promising solution to build a programmable wireless environment via steering the incident signal in fully customizable ways with reconfigurable passive elements. In this paper, we consider a RIS-aided multiuser multiple-input single-output (MISO) downlink communication system. Our objective is to maximize the weighted sum-rate (WSR) of all users by joint designing the beamforming at the access point (AP) and the phase vector of the RIS elements, while both the perfect channel state information (CSI) setup and the imperfect CSI setup are investigated. For perfect CSI setup, a low-complexity algorithm is proposed to obtain the stationary solution for the joint design problem by utilizing the fractional programming technique. Then, we resort to the stochastic successive convex approximation technique and extend the proposed algorithm to the scenario wherein the CSI is imperfect. The validity of the proposed methods is confirmed by numerical results. In particular, the proposed algorithm performs quite well when the channel uncertainty is smaller than 10%. |
| Author | Liang, Ying-Chang Chen, Jie Guo, Huayan Larsson, Erik G. |
| Author_xml | – sequence: 1 givenname: Huayan orcidid: 0000-0001-8419-150X surname: Guo fullname: Guo, Huayan email: guohuayan@pku.edu.cn organization: National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu, China – sequence: 2 givenname: Ying-Chang orcidid: 0000-0003-2671-5090 surname: Liang fullname: Liang, Ying-Chang email: liangyc@ieee.org organization: Center for Intelligent Networking and Communications (CINC), University of Electronic Science and Technology of China (UESTC), Chengdu, China – sequence: 3 givenname: Jie orcidid: 0000-0002-2196-9799 surname: Chen fullname: Chen, Jie email: chenjie.ay@gmail.com organization: National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu, China – sequence: 4 givenname: Erik G. orcidid: 0000-0002-7599-4367 surname: Larsson fullname: Larsson, Erik G. email: erik.g.larsson@liu.se organization: Department of Electrical Engineering (ISY), Linköping University, Linköping, Sweden |
| BackLink | https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-166490$$DView record from Swedish Publication Index (Linköpings universitet) |
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| CODEN | ITWCAX |
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| Snippet | Reconfigurable intelligent surfaces (RIS) is a promising solution to build a programmable wireless environment via steering the incident signal in fully... |
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| SubjectTerms | Algorithms Approximation algorithms Array signal processing Beam steering Beamforming Channel estimation Communications systems fractional programming Mathematical programming MISO (control systems) MISO communication multiple-input-multiple-output (MIMO) Numerical methods Optimization passive radio Precoding Reconfigurable intelligent surfaces Reconfigurable intelligent surfaces (RIS) stochastic successive convex approximation Wireless communication Wireless networks |
| Title | Weighted Sum-Rate Maximization for Reconfigurable Intelligent Surface Aided Wireless Networks |
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| Volume | 19 |
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