Orthogonal Versus Zero-Forced Beamforming in Multibeam Antenna Systems: Review and Challenges for Future Wireless Networks

Yanki Aslan, Antoine Roederer, Nelson J.G. Fonseca, Piero Angeletti, Alexander Yarovoy

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Orthogonality in multibeam antennas is revisited. The difference between orthogonal beamforming and zero-forced beamforming is highlighted. The intriguing relation between orthogonality, reciprocity and losses is recapitulated. Different approaches on the design of orthogonal beamforming networks and implementation of zero-forced beamforming strategies are shown with various examples from the antenna-research-oriented literature. The use of orthogonal and zero-forced beamforming is discussed from the communication system perspective with relevant studies from diverse disciplines. Some of the future research challenges and potential benefits are outlined for the next generation satellite and cellular communication applications.
Original languageEnglish
Article number9548673
Pages (from-to)879 - 901
Number of pages23
JournalIEEE Journal of Microwaves
Volume1
Issue number4
DOIs
Publication statusPublished - 2021

Keywords

  • Beamforming
  • interference suppression
  • multibeam antenna
  • orthogonality
  • wireless systems
  • zero-forcing

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