High SNR Analysis of RIS-Aided MIMO Broadcast Channels

Dominik Semmler, Michael Joham, Wolfgang Utschick

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We analyze the influence of a reconfigurable intelligent surface (RIS) on the Gram channel eigenvalues in a high signal-to-noise ratio (SNR) scenario. This allows to connect specific channel properties with the rank improvement capabilities of the RIS. In particular, fundamental limits due to a possible line-of-sight (LOS) setup between the base station (BS) and the RIS are derived. Furthermore, dirty paper coding (DPC) based schemes are compared to linear precoding in such a scenario and it is shown that under certain channel conditions, the performance gap between DPC and linear precoding vanishes.

Original languageEnglish
Title of host publication2023 IEEE 24th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2023 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages221-225
Number of pages5
ISBN (Electronic)9781665496261
DOIs
StatePublished - 2023
Event24th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2023 - Shanghai, China
Duration: 25 Sep 202328 Sep 2023

Publication series

NameIEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC

Conference

Conference24th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2023
Country/TerritoryChina
CityShanghai
Period25/09/2328/09/23

Keywords

  • eigenvalues
  • high SNR
  • line-of-sight
  • waterfilling

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