You are facing the Mona Lisa: Spot localization using PHY layer information

Souvik Sen, Božidar Radunović, Romit Roy Choudhury, Tom Minka

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

Abstract

This paper explores the viability of precise indoor localization using physical layer information in WiFi systems. We find evidence that channel responses from multiple OFDM subcarriers can be a promising location signature. While these signatures certainly vary over time and environmental mobility, we notice that their core structure preserves certain properties that are amenable to localization. We attempt to harness these opportunities through a functional system called PinLoc, implemented on off-the-shelf Intel 5300 cards. We evaluate the system in a busy engineering building, a crowded student center, a cafeteria, and at the Duke University museum, and demonstrate localization accuracies in the granularity of 1m x 1m boxes, called "spots". Results from 100 spots show that PinLoc is able to localize users to the correct spot with 89% mean accuracy, while incurring less than 6% false positives. We believe this is an important step forward, compared to the best indoor localization schemes of today, such as Horus.

Original languageEnglish (US)
Title of host publicationMobiSys'12 - Proceedings of the 10th International Conference on Mobile Systems, Applications, and Services
Pages183-196
Number of pages14
DOIs
StatePublished - Aug 1 2012
Externally publishedYes
Event10th International Conference on Mobile Systems, Applications, and Services, MobiSys'12 - Low Wood Bay, Lake District, United Kingdom
Duration: Jun 25 2012Jun 29 2012

Publication series

NameMobiSys'12 - Proceedings of the 10th International Conference on Mobile Systems, Applications, and Services

Other

Other10th International Conference on Mobile Systems, Applications, and Services, MobiSys'12
CountryUnited Kingdom
CityLow Wood Bay, Lake District
Period6/25/126/29/12

Keywords

  • application
  • cross-layer
  • localization
  • wireless

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Computer Science Applications

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