TY - JOUR
T1 - STAR-RIS Assisted Full-Duplex systems
T2 - Impact of Correlation and Maximization
AU - Papazafeiropoulos, Anastasios
AU - Kourtessis, Pandelis
AU - Krikidis, Ioannis
N1 - Publisher Copyright:
Crown
PY - 2022/9/1
Y1 - 2022/9/1
N2 - Given the high recent interest on the advantageous simultaneous transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) assisted systems providing full-space coverage compared to conventional (reflecting-only) RIS, we focus on the sum-rate performance of a full-duplex (FD) communication system. Contrary to previous work, we account for the unavoidable spatial correlation at the STAR-RIS, and we result in closed-form expressions based on statistical channel state information (CSI), expressed by large-scale statistics. Moreover, we propose a novel maximization of the sum-rate by optimizing simultaneously both the amplitudes and the phase-shifts of the STAR-RIS. This method has a reduced overhead, which is quite important on STAR-RIS systems that are implemented with double elements compared to conventional-RIS.
AB - Given the high recent interest on the advantageous simultaneous transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) assisted systems providing full-space coverage compared to conventional (reflecting-only) RIS, we focus on the sum-rate performance of a full-duplex (FD) communication system. Contrary to previous work, we account for the unavoidable spatial correlation at the STAR-RIS, and we result in closed-form expressions based on statistical channel state information (CSI), expressed by large-scale statistics. Moreover, we propose a novel maximization of the sum-rate by optimizing simultaneously both the amplitudes and the phase-shifts of the STAR-RIS. This method has a reduced overhead, which is quite important on STAR-RIS systems that are implemented with double elements compared to conventional-RIS.
KW - Antennas
KW - Correlation
KW - Downlink
KW - Protocols
KW - Rayleigh channels
KW - Reflection
KW - Uplink
UR - http://www.scopus.com/inward/record.url?scp=85137870681&partnerID=8YFLogxK
U2 - 10.1109/LCOMM.2022.3204893
DO - 10.1109/LCOMM.2022.3204893
M3 - Article
AN - SCOPUS:85137870681
SP - 1
JO - IEEE Communications Letters
JF - IEEE Communications Letters
SN - 1089-7798
ER -