Title :
Impact of geometry on the accuracy of the passive-TDOA algorithm
Author :
Martin-Escalona, Israel ; Barcelo-Arroyo, Francisco
Author_Institution :
Dept. de Ing. Telemetica, Univ. Politec. de Cataluna, Barcelona
Abstract :
This paper presents a positioning algorithm to improve the performance of location systems based on two-way TOA techniques. This algorithm, which we call passive-TDOA, consists of computing the time-difference-of-arrival (TDOA) measurements from the TOA messages that some terminals generate in the positioning process. Passive-TDOA offers accurate results under optimum geometry. This work goes a step further and evaluates the accuracy of the algorithm in scenarios with adverse geometry. Accordingly, scenarios with access points in line and non-line of sight are studied through simulation and compared with the accuracy achieved by means of regular TOA.
Keywords :
direction-of-arrival estimation; geometry; radio networks; time-of-arrival estimation; access points in line; location system performance; non-line of sight; optimum geometry; passive-TDOA algorithm; positioning algorithm; time-difference-of-arrival measurement; wireless networks; Clocks; Computer networks; Delay; Fingerprint recognition; Geometry; Position measurement; Scalability; Synchronization; Time difference of arrival; Wireless networks; GDOP; Passive; TDOA; TOA; accuracy; geometry; indoor positioning; scalability;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2008. PIMRC 2008. IEEE 19th International Symposium on
Conference_Location :
Cannes
Print_ISBN :
978-1-4244-2643-0
Electronic_ISBN :
978-1-4244-2644-7
DOI :
10.1109/PIMRC.2008.4699736
