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Title: Numerical study of the effect of normalised window size, sampling frequency, and noise level on short time Fourier transform analysis

Photonic Doppler velocimetry, also known as heterodyne velocimetry, is a widely used optical technique that requires the analysis of frequency modulated signals. This paper describes an investigation into the errors of short time Fourier transform analysis. The number of variables requiring investigation was reduced by means of an equivalence principle. Error predictions, as the number of cycles, samples per cycle, noise level, and window type were varied, are presented. The results were found to be in good agreement with analytical models.
Authors:
 [1]
  1. AWE, Aldermaston, Reading, Berkshire RG7 4PR (United Kingdom)
Publication Date:
OSTI Identifier:
22220391
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 84; Journal Issue: 10; Other Information: (c) 2013 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ADMINISTRATIVE PROCEDURES; ERRORS; FOURIER TRANSFORMATION; LASERS; NOISE; NUMERICAL ANALYSIS; OPTICS; SAMPLING; SIGNALS