Optimization technique based localization in IEEE 802.11 WLAN

Localization of mobile node using wireless local area network (WLAN) become a most emerging area because of its location based services provided to users. Applications of localization are found in various location based services like intruder identification and detection of possible threat. These applications require physical location of mobile node to be known beforehand. Various localization techniques exist to determine the location of a mobile node in indoor and outdoor environments. In this paper, we propose a new indoor positioning method based on ranging measurement. In this method, location of mobile node is estimated using Newton Raphson (NR) optimization technique. We also compared our proposed method with New- ton Gaussian (NG) and trilateration ranging based techniques. Through extensive simulation, we found that the accuracy of our scheme is better than trilateration and comparable with Newton Gaussian technique.