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Title page for ETD etd-03282008-123516

Type of Document Master's Thesis
Author Collings, Stephen William
URN etd-03282008-123516
Title Acoustic Beamforming on Wireless Sensor Nodes
Degree Master of Science
Department Electrical Engineering
Advisory Committee
Advisor Name Title
Akos Ledeczi Committee Member
Gabor Karsai Committee Member
  • VHDL
  • fpga
  • Sensor networks
  • mote
  • wireless
  • Beamforming
  • acoustic beamforming
  • mica
  • micaz
  • wireless sensor network
  • wireless sensor node
  • sensor node
Date of Defense 2008-03-27
Availability unrestricted
Acoustic beamforming is described in general terms, and the problems of implementing online acoustic beamforming on a wireless sensor node are described. A low-power FPGA-based solution is presented, implemented on a sensor board for a MicaZ mote. An integrated FFT-based frequency filter is also presented. The results of tests performed in an anechoic chamber demonstrate that the system behaves as desired, performing beamforming in real time, filtering undesired frequencies, and transmitting the beamforms to another nearby node. Power consumption of the system remains within acceptable limits for wireless sensor deployment.
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