Description
Indoor location systems cannot rely on technologies such as GPS (Global
Positioning System) to determine the position of a mobile terminal, because its
signals are blocked by obstacles such as walls, ceilings, roofs, etc. In such environments.
The use of alternative techniques, such as the use of wireless networks,
should be considered. The location estimation is made by measuring and analysing
one of the parameters of the wireless signal, usually the received power. One of
the techniques used to estimate the locations using wireless networks is fingerprinting.
This technique comprises two phases: in the first phase data is collected
from the scenario and stored in a database; the second phase consists in determining
the location of the mobile node by comparing the data collected from the wireless
transceiver with the data previously stored in the database. In this paper an approach
for localisation using fingerprinting based on Fuzzy Logic and pattern searching is
presented. The performance of the proposed approach is compared with the performance
of classic methods, and it presents an improvement between 10.24% and
49.43%, depending on the mobile node and the Fuzzy Logic parameters.ł
; Coutinho, Luis 
