Artificial Rich Scattering-Assisted MIMO Systems Using Passive Backscatter Devices

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

Abstract

Reconfigurable intelligent surfaces (RIS) are emerging as a promising technology for the future 6G networks. One of the challenges of IRS systems is that they require feedback control which in turn means that they have to have receiver and microcontroller that consume power. In this paper, we propose to use passive chipless backscatter devices to shape the channel between the transmitter and the receiver. We propose a novel artificial rich scattering (ARS)-assisted MIMO system, that uses passive chipless backscatter devices to shape the channel covariance matrix by increasing its rank even if the direct transmission channel has strong line-of-sight (LoS) component. In particular, we conduct a large system analysis and show that the achievable rate is independent of the phase shift matrix at the backscattering nodes. Moreover, by introducing large number of passive scattering elements in the system, we can improve the system capacity even with the presence of strong LoS component in MIMO channel. We also consider the case of ARS-assisted MISO case when the channel state information (CSI) is available at the transmitter side and derive tight lower bound on the ergodic rate.

Original languageEnglish
Title of host publication2022 3rd Information Communication Technologies Conference, ICTC 2022
PublisherIEEE
Pages19-24
Number of pages6
ISBN (Electronic)9781665495080
DOIs
Publication statusPublished - 2022
MoE publication typeA4 Article in a conference publication
EventInformation Communication Technologies Conference - Nanjing, China
Duration: 6 May 20228 May 2022
Conference number: 3

Publication series

Name2022 3rd Information Communication Technologies Conference, ICTC 2022

Conference

ConferenceInformation Communication Technologies Conference
Abbreviated titleICTC
Country/TerritoryChina
CityNanjing
Period06/05/202208/05/2022

Keywords

  • Backscatter Communications
  • MIMO
  • Reconfigurable Intelligent Surfaces

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