Reconfigurable Intelligent Surface Aided Generalized Spatial Modulation Based Multiuser MmWave MISO Systems

• Published in: IEEE Global Conference on Consumer Electronics pp. 1328 - 1329
• Main Authors: Hu, Chia-Chang, Yang, Te-Yu, Liao, Po-Kuan, Yang, Yun-An
• Format: Conference Proceeding
• Language: English
• Published: IEEE 29.10.2024
• Subjects: Array signal processing; Energy efficiency; generalized spatial modulation; Millimeter wave communication; MISO communication; mmWave; Modulation; multiuser MISO; Precoding; reconfigurable intelligent surface; Reconfigurable intelligent surfaces; Simulation; Switches; Transmitting antennas
• ISSN: 2693-0854
• DOI: 10.1109/GCCE62371.2024.10760641

The joint design of transmit hybrid precoding and reconfigurable intelligent surface (RIS) beamforming is studied for the generalized spatial modulation (GenSM) aided millimeter-wave (mmWave) multiuser multiple-input single-output (MU-MISO) systems. An innovative integration of the GenSM mechanism and the switch-and-inverter (SI) analog processing network is explored at the transmitter to alleviate the need of hardware complexity and energy consumption, and a coordinate update algorithm (CUA) is used to conduct antenna selection (AS) assignment. By means of relaxing RIS power consumption, only a limited number of RIS reflecting components are activated to achieve exceptional energy efficiency (EE) performance. In particular, the cross-entropy optimization (CEO) based algorithm is dedicated to optimize the unit selection and reflect beamforming at the RIS panel. Finally, simulation results confirm that the proposed GenSM-aided SIAS mmWave MU-MISO downlink system in the presence of an RIS is capable of offering an enhanced improvement on the EE.