Sensor-assisted localization in cellular systems

Liang Xiao, Larry J. Greenstein, Narayan B. Mandayam

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


We investigate the use of an auxiliary network of sensors to locate mobiles in a cellular system, based on the received signal strength at the sensor receivers from a mobile's transmission. The investigation uses a generic path loss model incorporating distance effects and spatially correlated shadow fading. We describe four simple localization schemes and show that they all meet E-911 requirements in most environments. Performance can be further improved by implementing the MMSE algorithm, which ideally reaches the Cramer-Rao Bound. We compare the MMSE algorithm and the four simple schemes when the model parameters are estimated via inter-sensor measurements.

Original languageEnglish (US)
Pages (from-to)4244-4248
Number of pages5
JournalIEEE Transactions on Wireless Communications
Issue number12
StatePublished - Dec 2007

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


  • Cellular systems
  • Localization
  • Mobile terminals
  • Path-loss models
  • Sensor networks


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