Publication detail

Indoor RIS-Assisted Wireless System With Location-Based Reflective Patterns

FRANEK, O.

Original Title

Indoor RIS-Assisted Wireless System With Location-Based Reflective Patterns

Type

journal article in Web of Science

Language

English

Original Abstract

Reconfigurable intelligent surface (RIS) has emerged as a highly promising infrastructure benefiting from its capability to manipulate the propagation environment and facilitate efficient aggregation of wireless transmission signals. However, a major challenge in these systems is the significant overhead incurred by the acquisition of channel state information. This paper proposes a pre-designed beam-based transmission protocol that aims to reduce the burden of pilot overhead by designing a RIS reflective pattern codebook as an alternative to channel estimation (CE). We adopt an electromagnetic-compliant RIS model and develop a theoretical approximate expression for the channel gain, incorporating the impact of location mismatch. This approximation facilitates the construction of a location-based reflective pattern codebook, wherein the chosen locations linked with the codewords represent optimal location sampling points derived from theoretical results. By utilizing the constructed codebook, our proposed transmission protocol enables the system to search reflective patterns instead of real-time optimization. To validate our approach, extensive numerical simulations are conducted. The results demonstrate the accuracy of the approximate channel gain expression and highlight the superior coverage achieved by the proposed location-based reflective pattern codebook as well as the achievable spectral efficiency of our transmission protocol.

Keywords

Reconfigurable intelligent surfaces; Protocols; Optimization; Channel estimation; Real-time systems; Hardware; Array signal processing; Achievable spectral efficiency; channel gain; coverage; reconfigurable intelligent surface; transmission protocol

Authors

FRANEK, O.

Released

12. 3. 2024

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Location

PISCATAWAY

ISBN

0090-6778

Periodical

IEEE TRANSACTIONS ON COMMUNICATIONS

Year of study

11

Number

72

State

United States of America

Pages from

6722

Pages to

6736

Pages count

15

URL

https://xplorestaging.ieee.org/document/10534037

BibTex

@article{BUT197622,
  author="Ondřej {Franek}",
  title="Indoor RIS-Assisted Wireless System With Location-Based Reflective Patterns",
  journal="IEEE TRANSACTIONS ON COMMUNICATIONS",
  year="2024",
  volume="11",
  number="72",
  pages="6722--6736",
  doi="10.1109/TCOMM.2024.3402617",
  issn="0090-6778",
  url="https://xplorestaging.ieee.org/document/10534037"
}