Can I read Joint Beamforming Designs for Active Reconfigurable Intelligent Surface: A Sub-Connected Array Architecture on EtoBox?

Joint Beamforming Designs for Active Reconfigurable Intelligent Surface: A Sub-Connected Array Architecture by Zhu, Qi; Li, Ming; Liu, Rang; Liu, Yang; Liu, Qian is a scholarly article available to read on EtoBox.

What is Joint Beamforming Designs for Active Reconfigurable Intelligent Surface: A Sub-Connected Array Architecture about?

Reconfigurable intelligent surface (RIS) is regarded as a promising technology with great potential to boost wireless networks. Affected by the "double fading" effect, however, conventional passive RIS cannot bring considerable performance improvement when users are not close enough to RIS. Recently, active RIS is introduced to combat the double fading effect by actively amplifying incident signals with the aid of integrated reflection-type amplifiers. In order to reduce the hardware cost and energy consumption due to massive active components in the conventional fully-connected active RIS, a novel hardware-and-energy efficient sub-connected active RIS architecture has been proposed recently, in which multiple reconfigurable electromagnetic elements are driven by only one amplifier. In this paper, we first develop an improved and accurate signal model for the sub-connected active RIS architecture. Then, we investigate the joint transmit precoding and RIS reflection beamforming (i.e., the reflection phase-shift and amplification coefficients) designs in multiuser multiple-input single-output (MU-MISO) communication systems. Both sum-rate maximization and power minimization problems

Author

Zhu, Qi; Li, Ming; Liu, Rang; Liu, Yang; Liu, Qian

Published

2022

Language

EN