Paper Info
Title
A new time-based algorithm for positioning mobile terminals in wireless networks
Abstract
This paper presents a positioning algorithm, named time of arrival to time difference of arrival (TOAD), which computes time-difference-of-arrival (TDOA) measurements from the messages that time-of-arrival (TOA) stations in sight exchange while their positioning processes are running. This study addresses the accuracy of the TOAD algorithm in two different environments: line-of-sight (LOS) and non-line-of-sight (NLOS). Simulation is used to set up a wireless network. The Gauss-Newton nonlinear least squares algorithm is used to compute the positions in both TOA and TOAD stations. Results indicate that the TOAD algorithm increases the root mean square error (RMSE) of the positioning error in LOS scenarios by 10 to 20% compared with the RMSE achieved by TOA. This drop in accuracy contrasts with the results for the NLOS scenarios. The RMSE of TOAD in such scenarios is at least 10% lower than that achieved by TOA. This result is specially important since this latter scenario is the most common. Consequently, this novel technique therefore improves the scalability and integrity of TOA techniques based on RTT, making it possible for the stations to position themselves without injecting traffic and with QoS figures close and most times better than that achieved by TOA.
Year
DOI
Venue
2008
10.1155/2008/845173
EURASIP J. Adv. Sig. Proc.
Keywords
DocType
Volume
NLOS scenario,LOS scenario,wireless network,positioning algorithm,squares algorithm,new time-based algorithm,TOA technique,square error,positioning process,positioning error,TOAD algorithm,TOAD station,positioning mobile terminal
Journal
2008,
ISSN
Citations 
PageRank 
1687-6180
5
0.55
References 
Authors
15
2
Name
Order
Citations
PageRank
Israel Martin-Escalona1122.00
Francisco Barcelo-Arroyo2487.91