Date Added: Jan 2011
In a Wireless Network (WN), the wireless devices generally localize themselves with the help of anchors that are pre-deployed in the network. Some of the techniques commonly used for localization are Time of Arrival (ToA), Time Difference of Arrival (TDoA), Angle of Arrival (AoA), and Time of Flight (ToF). In the wireless domain, measurements are susceptible to errors resulting from the nature of the medium, the relatively low precision, and the presence of obstacles, which produce Non-Line Of Sight (NLOS) errors. The NLOS errors are a major concern as they could result in significant degradation in accuracy.