TY - GEN
T1 - Joint Beamforming Design for Reconfigurable Intelligent Surface Backscatter-Assisted Uplink NOMA Communication System
AU - Han, Shuai
AU - Sun, Zeyang
AU - Xu, Sai
AU - Li, Cheng
AU - Benslimane, Abderrahim
AU - Meng, Weixiao
N1 - Publisher Copyright:
© 2025 IEEE.
PY - 2025
Y1 - 2025
N2 - This paper investigates a reconfigurable intelligent surface (RIS) backscatter assisted uplink non-orthogonal multiple access (NOMA) communication system, where each wireless device is equipped with a RIS serving as a passive transmitter through backscatter modulation. Specifically, the RIS leverages the incident signal from a dedicated power beacon (PB) to modulate and deliver uplink information. We formulate a weighted sum rate maximization problem, subject to the constraints of the maximum power at the PB and the unit modulus requirement for the RIS. The optimization problem is solved by jointly optimizing the active beamforming vectors at the PB and the passive reflection coefficients at the RIS. Numerical simulations demonstrate that the proposed RIS backscatter uplink NOMA scheme achieves rapid convergence and significantly outperforms conventional active-antenna NOMA and time division multiple access schemes, validating the effectiveness and superiority of the proposed design for future IoT communications.
AB - This paper investigates a reconfigurable intelligent surface (RIS) backscatter assisted uplink non-orthogonal multiple access (NOMA) communication system, where each wireless device is equipped with a RIS serving as a passive transmitter through backscatter modulation. Specifically, the RIS leverages the incident signal from a dedicated power beacon (PB) to modulate and deliver uplink information. We formulate a weighted sum rate maximization problem, subject to the constraints of the maximum power at the PB and the unit modulus requirement for the RIS. The optimization problem is solved by jointly optimizing the active beamforming vectors at the PB and the passive reflection coefficients at the RIS. Numerical simulations demonstrate that the proposed RIS backscatter uplink NOMA scheme achieves rapid convergence and significantly outperforms conventional active-antenna NOMA and time division multiple access schemes, validating the effectiveness and superiority of the proposed design for future IoT communications.
KW - Reconfigurable intelligent surface
KW - backscatter
KW - non-orthogonal multiple access
UR - https://www.scopus.com/pages/publications/105036265252
U2 - 10.1109/GLOBECOM59602.2025.11431839
DO - 10.1109/GLOBECOM59602.2025.11431839
M3 - 会议稿件
AN - SCOPUS:105036265252
T3 - Proceedings - IEEE Global Communications Conference, GLOBECOM
SP - 5502
EP - 5507
BT - GLOBECOM 2025 - 2025 IEEE Global Communications Conference
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2025 IEEE Global Communications Conference, GLOBECOM 2025
Y2 - 8 December 2025 through 12 December 2025
ER -