Blockage-Aided RIS Cooperative Joint Beamforming for mmWave MIMO Systems

A reconfigurable intelligent surface (RIS) is a kind of metasurface that provides an adaptable way of controlling the propagation of radio signals in wireless systems, allowing for improved coverage and system efficiency. Instead of the traditional RIS-assisted single-to-multiple reflection channel,...

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Bibliographic Details
Published inIEEE transactions on vehicular technology Vol. 73; no. 1; pp. 1 - 7
Main Authors Sarker, Md Abdul Latif, Baek, Minjin, Han, Dong Seog
Format Journal Article
LanguageEnglish
Published New York IEEE 01.01.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Adaptation models
Algorithms
Array signal processing
Beamforming
Downlink
Joint beamforming
Millimeter wave communication
Millimeter waves
MIMO communication
mmWave MIMO
mobile blockage and RIS
Optimization
Radio signals
received power scaling
TL-HRC model
Wireless communication
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Summary:A reconfigurable intelligent surface (RIS) is a kind of metasurface that provides an adaptable way of controlling the propagation of radio signals in wireless systems, allowing for improved coverage and system efficiency. Instead of the traditional RIS-assisted single-to-multiple reflection channel, we present a time-variant location-centric hybrid reflection channel (TL-HRC) model in this paper. The designed TL-HRC model can easily enable mobile blockages and establish a cooperative relationship between the static and mobile RIS in millimeter wave multiple-input and multiple-output systems. Based on the designed TL-HRC model, we establish a joint active and passive beamforming problem for the weighted sum rate maximization and propose an alternative optimization with an RIS element selection (AO-RES) algorithm to tackle the challenging high dimensional coupled parameters. Through simulation experiments, the effectiveness of the proposed TL-HRC-based AO-RES algorithm is validated in terms of the weighted sum rate with the case of perfect channel state information.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2023.3304387