Title page for ETD etd-03292010-224530


Type of Document Dissertation
Author Jia, Tao
Author's Email Address taojia@vt.edu
URN etd-03292010-224530
Title Collaborative Position Location for Wireless Networks in Harsh Environments
Degree PhD
Department Electrical and Computer Engineering
Advisory Committee
Advisor Name Title
Buehrer, Richard Michael Committee Chair
Pasupathy, Raghu Committee Member
Pratt, Timothy J. Committee Member
Reed, Jeffrey Hugh Committee Member
Wyatt, Christopher L. Committee Member
Keywords
  • collaborative position location
  • non-line-of-sight (NLOS) propagation
Date of Defense 2010-03-18
Availability unrestricted
Abstract
Position location has become one of the more important tasks for improving communication and networking performance for future commercial wireless systems. It is also the enabling technology for many control and sensing applications envisioned by the wireless sensor networks (WSN). Despite its meaningfulness and many algorithms being developed in the past several years, position location in harsh propagation environments remains to be a challenging issue, due mainly to the lack of sufficient infrastructure support and the prominent phenomenon of non-line-of-sight (NLOS) signal propagation.

Recently, adopting the concept of collaborative position location has attracted much research interest due to its potential in overcoming the abovementioned two difficulties. In this work, we approach collaborative position location from two different angles. Specifically, we investigate the optimal performance of collaborative position location, which serves as a theoretical performance benchmark. In addition, we developed a computationally efficient algorithm for collaborative position location and incorporated an effective NLOS mitigation method to improve its performance in NLOS-dense environments. Overall, our work provides insight into both theoretical and practical aspects of collaborative position location.

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