Sound Based Positioning

Abstract

With a growing interest in non-GPS positioning, navigation, and timing (PNT), sound based positioning provides a precise way to locate both sound sources and microphones through audible signals of opportunity (SoOPs). Exploiting SoOPs allows for passive location estimation. But, attributing each signal to a specific source location when signals are simultaneously emitting proves problematic. Using an array of microphones, unique SoOPs are identified and located through steered response beamforming. Sound source signals are then isolated through time-frequency masking to provide clear reference stations by which to estimate the location of a separate microphone through time difference of arrival measurements. Results are shown for real data.

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Document Details

Document Type
Technical Report
Publication Date
Mar 23, 2017
Accession Number
AD1054779

Entities

People

  • David L. Weathers

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Autonomy
  • Sensors
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Acoustic Propagation
  • Acoustics
  • Air Force
  • Aircrafts
  • Algorithms
  • Cross Correlation
  • Data Analysis
  • Dead Reckoning
  • Detection
  • Detectors
  • Electrical Engineering
  • Engineering
  • Equations
  • Frequency
  • Global Positioning Systems
  • Measurement
  • Mobile Phones
  • Navigation
  • Signal Processing
  • United States
  • Unmanned Aerial Vehicles

Fields of Study

  • Engineering

Readers

  • Acoustics.
  • Positioning, Navigation, and Timing (PNT) Technology.
  • Theoretical Analysis.

Technology Areas

  • Space