Location determination using ieee 802.11 standarts

Recently, Wireless LANs are becoming increasingly popular, especially those based on IEEE 802.11a,b and g standards. Wireless networks are having a vital importance when a large number of nodes (user) have to be deployed, and/or in accurate situations. Positioning systems for indoor areas using the existing wireless local area network infrastructure have been proposed. Thus far, many characteristic features of RSSI have not been thoroughly investigated. Many researchers have relied on the RSSI as signal information to determine objects location while ignoring the characteristic of RSSI. We study the problem of determining the location of a mobile device in indoor areas using with RSSI. The problem is so complicated because RF Signals are affected by the noise, interference, multi-path effect and random movement in the indoor environment. In this thesis, we develop a method for analyzing such positioning systems. We find that in spite of this randomness, the signal information is enough to detect the position of a mobile device with a small error margin.