Overhead-Aware Design of Reconfigurable Intelligent Surfaces in Smart Radio Environments

03/05/2020
by   Alessio Zappone, et al.
0

Reconfigurable intelligent surfaces have emerged as a promising technology for future wireless networks. Given that a large number of reflecting elements is typically used, and that the surface has no signal processing capabilities, a major challenge is to cope with the overhead that is required to estimate the channel state information and to report the optimized phase shifts to the surface. This issue has not been addressed by previous works, which do not explicitly consider the overhead during the resource allocation phase. This work aims at filling this gap, developing an overhead-aware resource allocation framework for wireless networks where reconfigurable intelligent surfaces are used to improve the communication performance. An overhead model is developed and incorporated in the expressions of the system rate and energy efficiencies, which are then optimized with respect to the phase shifts of the reconfigurable intelligent surface, the transmit and receive filters, and the power and bandwidth used for the communication and feedback phases. The bi-objective maximization of the rate and energy efficiency is carried out as well. The proposed framework allows characterizing the trade-off between optimized radio resources and the related overhead in networks with reconfigurable intelligent surfaces.

READ FULL TEXT

page 1

page 2

page 3

page 4

research
07/15/2020

On The Optimal Number of Reflecting Elements for Reconfigurable Intelligent Surfaces

This work considers a point-to-point link where a reconfigurable intelli...
research
05/12/2023

Zero-Energy Reconfigurable Intelligent Surfaces (zeRIS)

A primary objective of the forthcoming sixth generation (6G) of wireless...
research
09/13/2021

Optimization of Reconfigurable Intelligent Surfaces Through Trace Maximization

Reconfigurable Intelligent Surfaces (RIS) have received significant atte...
research
07/03/2022

X-haul Outage Compensation in 5G/6G Using Reconfigurable Intelligent Surfaces

5G network operators consider the dense deployment of small base-station...
research
04/21/2023

An Orchestration Framework for Open System Models of Reconfigurable Intelligent Surfaces

To obviate the control of reflective intelligent surfaces (RISs) and the...
research
06/10/2019

Intelligent Reflecting Surface vs. Decode-and-Forward: How Large Surfaces Are Needed to Beat Relaying?

The rate and energy efficiency of wireless channels can be improved by d...
research
02/01/2021

Reconfigurable Intelligent Surfaces: A Signal Processing Perspective With Wireless Applications

A reconfigurable intelligent surface (RIS) is a two-dimensional surface ...

Please sign up or login with your details

Forgot password? Click here to reset