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SUMMARY:Estimating the position error of 802.11-based indoor positioning s
 ystems - Rene Hansen\, Aalborg University
DTSTART:20090126T140000Z
DTEND:20090126T150000Z
UID:TALK15760@talks.cam.ac.uk
CONTACT:Andrew Rice
DESCRIPTION:802.11-based indoor positioning have been under research for q
 uite some time now. However\, the majority of the research focuses on the 
 calculation of position estimates themselves. In this presentation I will 
 go one step further and discuss how the position error that is inherent to
  802.11-based positioning systems can be estimated.\n\nKnowing the positio
 n error is beneficial to many applications that rely on position informati
 on. For instance\, informing a user about the estimated position error wil
 l allow him to assess the level of trust these position estimates contain 
 and then take appropriate countermeasures\, e.g.\, look around the area de
 fined by the position error for his true position.\n\nI will present five 
 novel algorithms to estimate the positioning error by taking different fea
 tures into account. The algorithms have been evaluated in two different re
 al-world deployments and the results show that the algorithms are able to 
 estimate the position error to within 1.45 meters on average.
LOCATION:FW26\, William Gates Building
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