Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/11867
Title: User-Centric Cell-Free Massive Mimo With Ris-Integrated Antenna Arrays
Authors: Demir, Özlem Tuğfe
Bjornson, Emil
Keywords: Cell-Free Massive Mimo
Ris-Integrated Antenna Array
Dynamic Cooperation Clustering
Ris Configuration
Publisher: Ieee
Series/Report no.: IEEE International Workshop on Signal Processing Advances in Wireless Communications
Abstract: Cell-free massive MIMO (multiple-input multiple-output) is a promising network architecture for beyond 5G systems, which can particularly offer more uniform data rates across the coverage area. Recent works have shown how reconfigurable intelligent surfaces (RISs) can be used as relays in cell-free massive MIMO networks to improve data rates further. In this paper, we analyze an alternative architecture where an RIS is integrated into the antenna array at each access point and acts as an intelligent transmitting surface to expand the aperture area. This approach alleviates the multiplicative fading effect that normally makes RIS-aided systems inefficient and offers a cost-effective alternative to building large antenna arrays. We use a small number of antennas and a larger number of controllable RIS elements to match the performance of an antenna array whose size matches that of the RIS. In this paper, we explore this innovative transceiver architecture in the uplink of a cell-free massive MIMO system for the first time, demonstrating its potential benefits through analytic and numerical contributions. The simulation results validate the effectiveness of our proposed phase-shift configuration and highlight scenarios where the proposed architecture significantly enhances data rates.
URI: https://doi.org/10.1109/SPAWC60668.2024.10694297
ISBN: 9798350393194
9798350393187
ISSN: 1948-3244
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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