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Issue No.06 - June (2007 vol.6)
pp: 689-705
ABSTRACT
The recent proliferation of Location-Based Services (LBSs) has necessitated the development of effective indoor positioning solutions. In such a context, Wireless Local Area Network (WLAN) positioning is a particularly viable solution in terms of hardware and installation costs due to the ubiquity of WLAN infrastructures. This paper examines three aspects of the problem of indoor WLAN positioning using received signal strength (RSS). First, we show that, due to the variability of RSS features over space, a spatially localized positioning method leads to improved positioning results. Second, we explore the problem of access point (AP) selection for positioning and demonstrate the need for further research in this area. Third, we present a kernelized distance calculation algorithm for comparing RSS observations to RSS training records. Experimental results indicate that the proposed system leads to a 17 percent (0.56 m) improvement over the widely used K-nearest neighbor and histogram-based methods.
INDEX TERMS
Location-dependent and sensitive mobile applications, applications of pattern recognition, nonparametric statistics, support services for mobile computing.
CITATION
Azadeh Kushki, Konstantinos N. Plataniotis, Anastasios N. Venetsanopoulos, "Kernel-Based Positioning in Wireless Local Area Networks", IEEE Transactions on Mobile Computing, vol.6, no. 6, pp. 689-705, June 2007, doi:10.1109/TMC.2007.1017
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