Physics-based Modeling of Large Intelligent Reflecting Surfaces for Scalable Optimization

06/05/2020
by   Marzieh Najafi, et al.
0

In this paper, we develop a physics-based model that allows a scalable optimization of large intelligent reflecting surfaces (IRSs). The basic idea is to partition the IRS unit cells into several subsets, referred to as tiles, and model the impact of each tile on the wireless channel. Borrowing concepts from the radar literature, we model each tile as an anomalous reflector, and derive its impact on the wireless channel for given unit cell phase shifts by solving the corresponding integral equations for the electric and magnetic vector fields. Based on this model, one can design the phase shifts of the unit cells of a tile offline for the support of several transmission modes and then select the best mode online for a given channel realization. Therefore, the number of tiles and transmission modes in the proposed model are design parameters that can be adjusted to trade performance for complexity.

READ FULL TEXT

page 1

page 2

page 3

page 4

research
04/27/2020

Physics-based Modeling and Scalable Optimization of Large Intelligent Reflecting Surfaces

Intelligent reflecting surfaces (IRSs) have the potential to transform w...
research
03/12/2021

Smart and Reconfigurable Wireless Communications: From IRS Modeling to Algorithm Design

Intelligent reflecting surfaces (IRSs) have been introduced into wireles...
research
08/25/2021

Designing Wireless Powered Networks assisted by Intelligent Reflecting Surfaces with Mechanical Tilt

In this paper, we propose a fairness-aware rate maximization scheme for ...
research
04/07/2021

Optimal Resource Allocation Design for Large IRS-Assisted SWIPT Systems: A Scalable Optimization Framework

In this paper, we study the optimal resource allocation algorithm design...
research
05/12/2021

Global Optimization for IRS-Assisted Wireless Communications: from Physics and Electromagnetic Perspectives

Intelligent reflecting surfaces (IRSs) are envisioned to be a disruptive...
research
09/21/2022

Performance Impact of Channel Aging and Phase Noise on Intelligent Reflecting Surface

This letter aims to clarify the impact of channel aging and phase noise ...
research
06/01/2021

SWIPT with Intelligent Reflecting Surfaces under Spatial Correlation

Intelligent reflecting surfaces (IRSs) can be beneficial to both informa...

Please sign up or login with your details

Forgot password? Click here to reset