Quasi-optical 3D localization using asymmetric signatures above 100 GHz

Atsutse Kludze, Rabi Shrestha, Chowdhury Miftah, Edward Knightly, Daniel Mittleman, Yasaman Ghasempour

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

7 Scopus citations

Abstract

The spectrum above 100 GHz has the potential to enable accurate 3D wireless localization due to the large swath of available spectrum. Yet, existing wide-band localization systems utilize the time of arrival measurements requiring strict time synchronization. In this paper, we present 123-LOC, a novel non-coherent system for one-shot dual-polarized 3D localization above 100 GHz. Our key idea is to create unique asymmetric THz fingerprints in 3D so that a wireless node can jointly infer its angular position and distance by taking hints from the measured power-spectrum profile. We introduce a dual-polarized dual-slit waveguide structure that emits out signals into free-space with a key feature that the beam pattern depends on the frequency of the signal and the geometry of the slit. To distinguish the emissions from the two slits, we use polarization diversity and manipulate the aperture geometry of the two slits so that they transmit slightly different angular-spectral signatures. Our over-The-Air experiments demonstrate that 123-LOC achieves an average angle estimation error of 1° together with millimeter-scale ranging resolution, solely through non-coherent power measurements.

Original languageEnglish (US)
Title of host publicationACM MobiCom 2022 - Proceedings of the 2022 28th Annual International Conference on Mobile Computing and Networking
PublisherAssociation for Computing Machinery
Pages120-132
Number of pages13
ISBN (Electronic)9781450391818
DOIs
StatePublished - Oct 14 2022
Event28th ACM Annual International Conference on Mobile Computing and Networking, MobiCom 2022 - Sydney, Australia
Duration: Oct 17 2202Oct 21 2202

Publication series

NameProceedings of the Annual International Conference on Mobile Computing and Networking, MOBICOM

Conference

Conference28th ACM Annual International Conference on Mobile Computing and Networking, MobiCom 2022
Country/TerritoryAustralia
CitySydney
Period10/17/0210/21/02

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Hardware and Architecture
  • Software

Keywords

  • THz
  • dispersion
  • leaky waveguide
  • localization
  • polarization

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