Properties of channel interference for Wi-Fi location fingerprinting

Eddie C.L. Chan, George Baciu, S. C. Mak

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Localization systems for indoor areas have recently been suggested that make use of existing wireless local area network (WLAN) infrastructure and location fingerprinting approach. However, most existing research work ignores channel interference between wireless infrastructures and this could affect accurate and precise positioning. A better understanding of the properties of channel interference could assist in improving the positioning accuracy while saving significant amounts of resources in the location-aware infrastructure. This paper investigates to what extent the positioning accuracy is affected by channel interference between access points. Two sets of experiments compare how the positioning accuracy is affected in three different channel assignment schemes: ad-hoc, sequential, and orthogonal data is analyzed to understand what features of channel interference affect positioning accuracy. The results show that choosing an appropriate channel assignment scheme could make localization 10% more accurate and reduces the number of access points that are required by 15%. The experimental analysis also indicates that the channel interference usually obeys a right-skewed distribution and positioning accuracy is heavily dependent on channel interference between access points (APs).
Original languageEnglish
Pages (from-to)56-64
Number of pages9
JournalJournal of Communications Software and Systems
Volume6
Issue number2
Publication statusPublished - 1 Jun 2010

Keywords

  • Channel interference
  • Indoor positioning
  • Location fingerprinting

ASJC Scopus subject areas

  • Software
  • Electrical and Electronic Engineering

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