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Wi-Fi based radio map for location sensing by hypothesizing existence of barriers

Published: 15 February 2009 Publication History

Abstract

Location-aware services using mobile devices have become popular and many WiFi-based location systems have been developed. Position estimation algorithms in radio waves often use radio maps in order to achieve accurate positioning. Widespread use of WiFi-based location systems requires radio maps precisely representing the actual radio conditions at low cost. We propose an algorithm for making precise radio maps by hypothesizing the existence of barriers. The algorithm we propose can adopt training data collected by many common training methods. This algorithm combines training data and location information of access points in order to infer accurate radio conditions. We explain how the algorithm works when used with training data obtained from an Autonomous Acquision Mechanism. We evaluated and confirmed the utility of our radio map using a particle filter method.

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cover image ACM Conferences
ICUIMC '09: Proceedings of the 3rd International Conference on Ubiquitous Information Management and Communication
February 2009
704 pages
ISBN:9781605584058
DOI:10.1145/1516241
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Association for Computing Machinery

New York, NY, United States

Publication History

Published: 15 February 2009

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Author Tags

  1. location-aware system
  2. radio map
  3. wireless LAN

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