Mitigating the antenna orientation effect on indoor Wi-Fi positioning of mobile phones

Da Su, Zhenhui Situ, Wang Hei Ho

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

5 Citations (Scopus)

Abstract

Due to the limitation of GPS in indoor environment and the rapid growth of Wi-Fi hotspots and mobile devices, indoor Wi-Fi-based positioning has been attracting growing interest. In this paper, we implement a practical and convenient indoor positioning system based on the fingerprint method and Kalman filter on Android mobile devices. This paper not only discusses the positioning algorithms, but also addresses various challenges in practical application, such as the effect of antenna orientation and signal fluctuation. Specifically, an improved mapping algorithm based on k-nearest neighbors (K-NN) is introduced to tackle the orientation effect, and an orientation-based fingerprint database is established through studying the received signal strength patterns in different directions to handle the large fluctuation caused by orientation change. Finally, our experimental result indicates that the proposed indoor positioning system can achieve up to 1.2 meters accuracy in 90 percent of time, which is sufficient for supporting various navigation and infotainment services in large-scale indoor environments (e.g., shopping malls).
Original languageEnglish
Title of host publication2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015
PublisherIEEE
Pages2105-2109
Number of pages5
Volume2015-December
ISBN (Electronic)9781467367820
DOIs
Publication statusPublished - 1 Dec 2015
Event26th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015 - Hong Kong, Hong Kong
Duration: 30 Aug 20152 Sep 2015

Conference

Conference26th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015
Country/TerritoryHong Kong
CityHong Kong
Period30/08/152/09/15

Keywords

  • Android Mobile Phone
  • Antenna Orientation
  • Fingerprint Method
  • Indoor Wi-Fi Positioning
  • Kalman Filter
  • KNN

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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