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Title page for ETD etd-07292005-140032

Type of Document Master's Thesis
Author Kushwaha, Manish
Author's Email Address manish@isis.vanderbilt.edu
URN etd-07292005-140032
Title Sensor Node Localization Using Mobile Acoustic Beacons
Degree Master of Science
Department Computer Science
Advisory Committee
Advisor Name Title
Dr. Akos Ledeczi Committee Member
Dr. Gabor Karsai Committee Member
  • acoustic ranging
  • Sensor networks -- Design and construction
  • localization
  • Acoustic localization
Date of Defense 2005-08-03
Availability unrestricted
Node localization, also known as self-localization, is the problem of localizing physical sensor nodes in a given sensor network deployment. Localization is an essential tool for the deployment of low-cost sensor networks for use in location-aware applications and ubiquitous networking.

In this thesis, we present a mobile acoustic beacon based sensor node localization method. Our technique is passive in that the sensor nodes themselves do not need to generate an acoustic signal for ranging. This saves cost, energy and provides stealthy operation. The acoustic ranging method used in this work provides longer range and higher accuracy. The mobile beacon can generate much more acoustic energy than a severely resource constrained sensor node, thereby significantly increasing the range. The localization algorithm is especially designed to work in reverberant environment such as dense urban terrain. The presented algorithm handles non-Gaussian ranging errors caused by echoes. Node locations are computed centrally by solving a global non-linear optimization problem in an iterative and incremental fashion.

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