Location of WLAN devices based on OFDM signals time synchronization

This paper addresses the problem of indoor location for devices that are connected to WLAN. Nowdays most of the smart terminals: mobile phones, portable computers and tablets are WLAN enabled. Location of these devices is of interest to network security issues as well as employee and company security and reliability. Most of the algorithms on the market use triangulation as a basic rule for location of the devices, when distance between acces point and mobile user is estimated. Using advanced signal processsing tehniques of the baseband OFDM signal, we propose a solution that gives reliable estimates of the distance at reasonable computational cost.