TY - GEN
T1 - Irregular STAR-RIS-Aided Wireless Systems with a Limited Number of Passive Elements
AU - Ben Fadel, Ahmed S.
AU - Elganimi, Taissir Y.
AU - Rabie, Khaled M.
AU - Nauryzbayev, Galymzhan
AU - Li, Xingwang
N1 - Publisher Copyright:
© 2024 IEEE.
PY - 2024
Y1 - 2024
N2 - Simultaneous transmitting and reflecting reconfigurable intelligent surfaces (STAR-RISs) have recently gained a great deal of attention due to their ability of providing full-space service coverage and supporting stable transmission for ultra reliable and low latency communications (URLLC). In this paper, a novel concept called irregular STAR-RIS is proposed with a small portion of activated transmitting and reflecting elements, where users in opposite sides of the surface are served simultaneously. In this proposed system, a tabu search-based sparse deployment and neighbor extraction-based cross-entropy method for the beamforming optimization of the proposed irregular STAR-RIS are considered. For the sake of fair comparison and to highlight the achievable gains, the weighted sum-rate (WSR) performance of a regular STAR-RIS-aided wireless system and a traditional system without STAR-RIS is also evaluated. The results show that the proposed irregular STAR-RIS with a small portion of active elements is capable of significantly improving the WSR performance compared to the conventional systems without STAR-RIS. It is also shown that the position of the users has an impact on the WSR performance, and that the near users have better performance than the far ones.
AB - Simultaneous transmitting and reflecting reconfigurable intelligent surfaces (STAR-RISs) have recently gained a great deal of attention due to their ability of providing full-space service coverage and supporting stable transmission for ultra reliable and low latency communications (URLLC). In this paper, a novel concept called irregular STAR-RIS is proposed with a small portion of activated transmitting and reflecting elements, where users in opposite sides of the surface are served simultaneously. In this proposed system, a tabu search-based sparse deployment and neighbor extraction-based cross-entropy method for the beamforming optimization of the proposed irregular STAR-RIS are considered. For the sake of fair comparison and to highlight the achievable gains, the weighted sum-rate (WSR) performance of a regular STAR-RIS-aided wireless system and a traditional system without STAR-RIS is also evaluated. The results show that the proposed irregular STAR-RIS with a small portion of active elements is capable of significantly improving the WSR performance compared to the conventional systems without STAR-RIS. It is also shown that the position of the users has an impact on the WSR performance, and that the near users have better performance than the far ones.
KW - 6G
KW - irregular RIS
KW - Reconfigurable intelligent surface (RIS)
KW - STAR-RIS
KW - weighted sum-rate (WSR)
UR - http://www.scopus.com/inward/record.url?scp=85202444905&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85202444905&partnerID=8YFLogxK
U2 - 10.1109/ICCWorkshops59551.2024.10615524
DO - 10.1109/ICCWorkshops59551.2024.10615524
M3 - Conference contribution
AN - SCOPUS:85202444905
T3 - 2024 IEEE International Conference on Communications Workshops, ICC Workshops 2024
SP - 1201
EP - 1206
BT - 2024 IEEE International Conference on Communications Workshops, ICC Workshops 2024
A2 - Valenti, Matthew
A2 - Reed, David
A2 - Torres, Melissa
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 59th Annual IEEE International Conference on Communications Workshops, ICC Workshops 2024
Y2 - 9 June 2024 through 13 June 2024
ER -
