RF Bearing Estimation in Wireless Sensor Networks

Abstract

This paper introduces a novel method for bearing estimation based on a rotating antenna generating a Doppler shifted RF signal. The small frequency change can be measured even on low cost resource constrained nodes using a radio interferometric technique introduced previously. Measuring the Doppler shift at two known locations provides a bearing estimate to the rotating node. An alternative approach employing a switched antenna array is proposed that provides improved robustness by avoiding moving parts.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2010
Accession Number
ADA520176

Entities

People

  • Akos Lédeczi
  • Janos Sallai
  • Péter Völgyesi

Organizations

  • Vanderbilt University

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Antenna Arrays
  • Antennas
  • Detectors
  • Doppler Effect
  • Far Field
  • Frequency
  • Frequency Shift
  • Measurement
  • Mesh Networks
  • Networks
  • Phase Shift
  • Radio Interferometry
  • Radio Signals
  • Radio Transmission
  • Sensor Networks
  • Transmitters
  • Wireless Sensor Networks

Fields of Study

  • Engineering

Readers

  • Computer Networking
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Image Processing and Computer Vision.