Abstract
Though GPS is the most popular positioning system at presents it does
not perform well in indoor environments and urban canyons or
metropolitan city areas. Wi-Fi has been accepted as one of the good
candidates for indoor positioning, its performance in outdoor
environment is also of interest as a Wi-Fi based positioning system
can overcome the shortcomings of GPS. An experiment has been
carried out in the Sydney CBD area, where Wi-Fi access points (AP)
are densely deployed. It is a cost effective system as the signal
strength of the existing APs are used. Fingerprinting technique is
utilized to determine the user’s position, 173 reference points were
selected to create the fingerprint database and 26 test points were used
to analyse the accuracy of positioning.