A Received Power Model for Reconfigurable Intelligent Surface and Measurement-based Validations

05/13/2021
by   Zipeng Wang, et al.
0

The idea of using a Reconfigurable Intelligent Surface (RIS) consisting of a large array of passive scattering elements to assist wireless communication systems has recently attracted much attention from academia and industry. A central issue with RIS is how much power they can effectively convey to the target radio nodes. Regarding this question, several power level models exist in the literature but few have been validated through experiments. In this paper, we propose a radar cross section-based received power model for an RIS-aided wireless communication system that is rooted in the physical properties of RIS. Our proposed model follows the intuition that the received power is related to the distances from the transmitter/receiver to the RIS, the angles in the TX-RIS-RX triangle, the effective area of each element, and the reflection coefficient of each element. To the best of our knowledge, this paper is the first to model the angle-dependent phase shift of the reflection coefficient, which is typically ignored in existing literature. We further measure the received power with our experimental platform in different scenarios to validate our model. The measurement results show that our model is appropriate both in near field and far field and can characterize the impact of angles well.

READ FULL TEXT

page 1

page 2

page 3

page 4

page 5

research
05/09/2020

Angle-Dependent Phase Shifter Model for Reconfigurable Intelligent Surfaces: Does the Angle-Reciprocity Hold?

The existing phase shifter models adopted for reconfigurable intelligent...
research
02/28/2021

RIS-Aided Wireless Communications: Prototyping, Adaptive Beamforming, and Indoor/Outdoor Field Trials

The prospects of using a Reconfigurable Intelligent Surface (RIS) to aid...
research
10/02/2021

Communication Models for Reconfigurable Intelligent Surfaces: From Surface Electromagnetics to Wireless Networks Optimization

A reconfigurable intelligent surface (RIS) is a planar structure that is...
research
06/21/2021

Electromagnetic Interference in RIS-Aided Communications

The prospects of using a reconfigurable intelligent surface (RIS) to aid...
research
12/10/2019

Reconfigurable Intelligent Surfaces: Bridging the gap between scattering and reflection

In this work we address the distance dependence of reconfigurable intell...
research
05/19/2022

Digital Reconfigurable Intelligent Surfaces: On the Impact of Realistic Reradiation Models

Reconfigurable intelligent surface (RIS) is an emerging technology that ...
research
09/11/2023

A DRL-based Reflection Enhancement Method for RIS-assisted Multi-receiver Communications

In reconfigurable intelligent surface (RIS)-assisted wireless communicat...

Please sign up or login with your details

Forgot password? Click here to reset