Zero-Forcing Beamforming for Beam Sweeping with Reconfigurable Holographic Surfaces

M. Yaser Yaǧan*, Ibrahim Hökelek*, Ali E. Pusane, Ali Görçin*

*Corresponding author for this work

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

Abstract

Reconfigurable holographic surfaces (RHSs) for multi-beam steering applications have been receiving significant attention due to their low fabrication cost and power consumption. RHSs have the advantage of exploiting more antenna elements by configuring only their radiation levels, as opposed to the typical phased antenna arrays which enable the control of each element's phase and amplitude. RHSs can be utilized to realize holographic beamforming with single-feed or multi-feeds, where digital beamforming can also be implemented using multi-feeds. In this paper, first, the holographic beamforming problem is formulated by means of the conventional beamforming expressions using the array factor and the holographic beamforming weights. Then, a zero-forcing beamforming method is developed for a single-feed RHS to generate multi-beam and multi-null patterns. Additionally, a bisectional null scanning approach for beam sweeping is presented to exploit the advantages of RHS for forming wide nulls in the beamspace. Simulation results imply a substantial advantage of such single-feed RHS for high-accuracy beam sweeping.

Original languageEnglish
Title of host publication2024 IEEE Wireless Communications and Networking Conference, WCNC 2024 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798350303582
DOIs
Publication statusPublished - 2024
Event25th IEEE Wireless Communications and Networking Conference, WCNC 2024 - Dubai, United Arab Emirates
Duration: 21 Apr 202424 Apr 2024

Publication series

NameIEEE Wireless Communications and Networking Conference, WCNC
ISSN (Print)1525-3511

Conference

Conference25th IEEE Wireless Communications and Networking Conference, WCNC 2024
Country/TerritoryUnited Arab Emirates
CityDubai
Period21/04/2424/04/24

Bibliographical note

Publisher Copyright:
© 2024 IEEE.

Keywords

  • beam sweeping
  • holographic beamforming
  • mmWave
  • reconfigurable holographic surface
  • zero-forcing beam-forming

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