Accession Number : ADP008990

Title :   The Significance of the Fourier Analysis in Signal Detection and Processing in Laser Doppler and Phase Doppler Applications,

Corporate Author : AEROMETRICS INC SUNNYVALE CA

Personal Author(s) : Ibrahim, K. M. ; Bachalo, W. D.

Report Date : 23 JUL 1992

Pagination or Media Count : 9

Abstract : A method using the Fourier analysis for burst detection is analyzed and evaluated in this paper. The performance of the method is compared to alternate methods using the signal power in the time domain and a method utilizing the autocorrelation approach. The relative performance was evaluated in terms of the integration time (or equivalently, the number of samples used for burst detection) and the SNR. The Fourier analysis method was shown to be superior to the time domain method and was clearly superior when the burst duration was short and the SNR was low. Analysis of the autocorrelation method suggested that its performance was comparable to the standard time domain approach. Furthermore, the Fourier transform method has the advantage of being independent of the signal and the noise amplitudes with the performance and signal detection replying on the SNR. (Author)

Descriptors :   *VELOCIMETERS, *FLOW VISUALIZATION, PHASE STUDIES, DOPPLER SYSTEMS, FOURIER ANALYSIS, BURST TRANSMISSION, SIGNAL TO NOISE RATIO, TIME DOMAIN.

Subject Categories : Optical Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE