Decoupling beam steering and user selection for scaling multi-user 60 GHz WLANs

Yasaman Ghasempour, Edward W. Knightly

Research output: Chapter in Book/Report/Conference proceedingConference contribution

14 Scopus citations

Abstract

Multi-user transmission at 60 GHz promises to increase the throughput of next generation WLANs via both analog and digital beamforming. To maximize capacity, analog beams need to be jointly configured with user selection and digital weights; however, joint maximization requires prohibitively large training and feedback overhead. In this paper, we scale multi-user 60 GHz WLAN throughput via design of a low-complexity structure for decoupling beam steering and user selection such that analog beam training precedes user selection. We introduce a two-class framework comprising (i) single shot selection of users by minimizing overlap of their idealized beam patterns obtained from analog training and (ii) interference-aware incremental addition of users via sequential training to better predict inter-user interference. We implement a programmable testbed using software defined radios and commercial 60 GHz transceivers and conduct over-the-air measurements to collect channel traces for different indoor WLAN deployments. Using trace based emulations and high resolution 60 GHz channel models, we show that our decoupling structure experiences less than 5% performance loss compared to maximum achievable rates via joint user-beam selection.

Original languageEnglish (US)
Title of host publicationMobiHoc 2017 - Proceedings of the 18th ACM International Symposium on Mobile Ad Hoc Networking and Computing
PublisherAssociation for Computing Machinery
ISBN (Electronic)9781450349123
DOIs
StatePublished - Jul 10 2017
Externally publishedYes
Event18th ACM International Symposium on Mobile Ad Hoc Networking and Computing, MobiHoc 2017 - Chennai, India
Duration: Jul 10 2017 → …

Publication series

NameProceedings of the International Symposium on Mobile Ad Hoc Networking and Computing (MobiHoc)
VolumePart F129153

Other

Other18th ACM International Symposium on Mobile Ad Hoc Networking and Computing, MobiHoc 2017
Country/TerritoryIndia
CityChennai
Period7/10/17 → …

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • Computer Networks and Communications
  • Software

Keywords

  • 60 GHz
  • Beam steering
  • Digital beamforming
  • MU-MIMO
  • User selection

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