Transmit power estimation using spatially diverse measurements under wireless fading

Murtaza Zafer, Bong Jun Ko, Wang Hei Ho

Research output: Journal article publicationJournal articleAcademic researchpeer-review

24 Citations (Scopus)


Received power measurements at spatially distributed monitors can be usefully exploited to deduce various characteristics of active wireless transmitters. In this paper, we study the problem of blind estimation of a wireless node's transmit power utilizing solely received power measurements at spatially distributed monitors, without any prior knowledge about the transmitter's location or any statistical characterization of its transmit power. We first consider a deterministic setup and utilize a geometrical approach to obtain fundamental limitations on estimating the transmit power and location of an unknown wireless node. We show that a regular placement of monitors, though appealing, does not provide sufficient measurement diversity to yield a unique estimate. We then extend the setup to consider wireless fading and present a theoretical analysis of maximum likelihood (ML) estimate, which is analytically shown to be asymptotically optimal. Finally, we provide numerical results comparing the performance of the estimator through simulations and on a dataset of field measurements.
Original languageEnglish
Article number5392995
Pages (from-to)1171-1180
Number of pages10
JournalIEEE/ACM Transactions on Networking
Issue number4
Publication statusPublished - 1 Aug 2010
Externally publishedYes


  • Cooperative monitoring
  • localization
  • mobile ad hoc network
  • power estimation
  • sensor
  • wireless

ASJC Scopus subject areas

  • Software
  • Computer Science Applications
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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