A LOCALIZATION ALGORITHM FOR A GPS-FREE SYSTEM WITH STATIC PARAMETER TUNING
The results of this paper are a part of the PESIT – ODU collaborative research initiative.
Localization in wireless network refers to determining the location of a mobile user which may either be stationary or in motion. This paper presents the design and evaluation of an algorithm for localization of mobile nodes in GSM networks. The proposed algorithm does not use GPS and has the advantages of being cost effective and reliable. The received signal strength from the base stations in the proximity of the mobile form the basis for the proposed algorithm. The algorithm concentrates on improving the accuracy of estimated location of the mobile by using a prediction-interpolation technique. The key aspects of the proposed localization technique are that it assumes linear dependency between the accuracy of the estimated mobile location and the received signal strengths from the neighboring base stations, and tunes the location estimate based on this mapping.
