Subscriber location in CDMA Wireless networks

Zahid Ali, Qurban Memon

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Location estimation in Wireless networks has become an important feature for improvement in public safety service. Its potential applications include location sensitive billing, asset tracking, fraud protection, mobile yellow pages, fleet management, etc. Several location techniques using terrestrial wireless network elements and radio signals have been proposed over the years, but multipath propagation, multiple access interference (MAI), and non-line-of-sight propagation have impeded the accuracy in mobile station (MS) positioning. Traditional location algorithms have derived location estimates assuming single user environment. However this assumption is not correct as measurement bias is introduced due to MAI. An interference cancellation based delay locked loop (DLL) for MS delay estimation is proposed in this paper, which is subsequently used for radio location. A system model is presented and simulations are carried out that show that proposed method provides MS position location quite accurately even in the presence of MAI.

Original languageEnglish
Title of host publicationWCICA 2012 - Proceedings of the 10th World Congress on Intelligent Control and Automation
Number of pages5
Publication statusPublished - 2012
Event10th World Congress on Intelligent Control and Automation, WCICA 2012 - Beijing, China
Duration: Jul 6 2012Jul 8 2012

Publication series

NameProceedings of the World Congress on Intelligent Control and Automation (WCICA)


Other10th World Congress on Intelligent Control and Automation, WCICA 2012


  • Delay Locked Loop
  • Radio Location
  • Subscriber Location
  • Successive Interference Cancellation

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Software
  • Computer Science Applications


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