Accession Number:

ADA231879

Title:

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

Descriptive Note:

Technical rept.

Corporate Author:

TEXAS UNIV AT AUSTIN APPLIED RESEARCH LABS

Personal Author(s):

Report Date:

1990-10-17

Pagination or Media Count:

65.0

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

Subject Categories:

  • Lasers and Masers
  • Test Facilities, Equipment and Methods
  • Active and Passive Radar Detection and Equipment
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE