Development of universal intelligent positioning system techniques in universal mobile telecommunications system networks

K. Singh, Mahamod Ismail, K. Jumari, Mardina Abdullah, Kamarulzaman Mat

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This study presents the development of techniques to estimate mobile user's location (position) for Universal Intelligent Positioning System (UIPS) project. DIPS uses combination of available Location Determining Technologies (LDT) and newly developed techniques for UMTS (3G) or beyond networks. The usage of each LDT (technique) will determine Location Base Services QoS (accuracy of mobile user's location). The new techniques developed are Close Circle Correlation (CCC) and Newton Raphsons 3 Circles (NR3C). Both techniques use time measurements observed from three Node B (base stations) in known Line of Sight (LOS) environment (multipath time delays are known). For unknown LOS environment, further enhancements on CCC technique and NR3C technique are developed, such as Averaging Estimator of CCC, First Mean Averaging Estimator of NR3C and Random Search Averaging Estimator of NR3C. The Cumulative Distribution Function of simulated results (simulation of actual data collected through drive test in UMTS network with known LOS) using NR3C technique produced 67% of the estimated user's location error at 0 in and 95% of the estimated location error at 1.7 nm. Using CCC technique, produced 67% estimated location error at 2.04 in and 95% estimated location error at 3.2 in. NR3C produces better accuracy in known conditions of multipath delays. In unknown LOS conditions, Averaging Estimator of CCC produced 67% location error at 50.67 in and 95% error at 218 in, which is better than the other two enhanced (averaging) techniques of NR3C.

Original languageEnglish
Pages (from-to)2412-2419
Number of pages8
JournalJournal of Applied Sciences
Volume8
Issue number13
DOIs
Publication statusPublished - 2008

Fingerprint

Mobile telecommunication systems
3G mobile communication systems
Time measurement
Base stations
Distribution functions
Time delay
Quality of service

Keywords

  • Location base services
  • Location determining technologies
  • Mobile positioning for UMTS

ASJC Scopus subject areas

  • General

Cite this

Development of universal intelligent positioning system techniques in universal mobile telecommunications system networks. / Singh, K.; Ismail, Mahamod; Jumari, K.; Abdullah, Mardina; Mat, Kamarulzaman.

In: Journal of Applied Sciences, Vol. 8, No. 13, 2008, p. 2412-2419.

Research output: Contribution to journalArticle

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