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

Journal Article · Tue Oct 15 00:00:00 EDT 2013 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4824190· OSTI ID:22220391

Ota, T. A. ^[1]

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1. AWE, Aldermaston, Reading, Berkshire RG7 4PR (United Kingdom)

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.

• OSTI ID: 22220391
• Journal Information: Review of Scientific Instruments, Vol. 84, Issue 10; Other Information: (c) 2013 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

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