Towards Fine-Grained Radio-Based Indoor Location

Location systems are key to a rich experience for mobile users. When they roam outdoors, mobiles can usually count on a clear GPS signal for an accurate location, but indoors, GPS usually fades, and so up until recently, mobiles have had to rely mainly on rather coarse-grained signal strength readings for location. What has changed this status quo is the recent trend of dramatically increasing numbers of antennas at the indoor AP, mainly to bolster capacity and coverage with Multiple-Input, Multiple-Output (MIMO) techniques.

Provided by: Association for Computing Machinery Topic: Mobility Date Added: Feb 2012 Format: PDF

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