Signal Processing Studies of a Simulated Laser Doppler Velocimetry-Based Acoustic Sensor

Abstract

In this report we discuss a possible remote acoustic sensing scheme based on laser Doppler velocimetry (LDV). The signal characteristics of an LDV signal from single particle scattering are described for differential and reference beam LDV configurations. A model is developed to simulate LDV signals which includes shot noise and random phase and additive noise contributions. Comparisons are made between results obtained from simulated and actual LDV signals using several signal processing techniques. The effects of various noise sources on LDV signal detectability and sensitivities to various optical parameters are studied using power spectral methods and a simulated LDV signal. Enhanced signal detectability in random noise backgrounds is investigated using spectral correlation methods. Results indicate that it may be possible to extend demonstrated LDV-based acoustic sensor sensitivities using higher order processing techniques. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 17, 1990
Accession Number
ADA231879

Entities

People

  • Martin L. Barlett

Organizations

  • University of Texas at Austin

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Acoustic Detection
  • Acoustic Detectors
  • Acoustic Impedance
  • Backscattering
  • Carrier Frequencies
  • Correlation Techniques
  • Data Acquisition
  • Detection
  • Detectors
  • Doppler Effect
  • Electromagnetic Radiation
  • Laser Beams
  • Particles
  • Radiation
  • Scattering
  • Shot Noise
  • Signal Processing

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Approximation Theory.
  • Fluid Dynamics.

Technology Areas

  • Directed Energy