A Technique to Enhance Localization in the Presence of NLOS Errors

— 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. In this paper, we propose an efficient technique that uses the distance estimates of the device from a group of anchors to localize the device with better accuracy in the presence of NLOS errors. Our technique is based on the notion that in general, for any estimate, the proportion of the NLOS error can be upper bounded. Using this upper bound information our technique reduc...

• Type: Conference
• Year: 2007
• Where: GLOBECOM
• Authors: Satyajayant Misra, Weiyi Zhang, Guoliang Xue
• Keywords: GLOBECOM 2007, Nlos Error, Non-Line Of Sight, Telecommunications , Wireless Device