National Instruments Order Analysis Toolset User Manual

Page 61

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Glossary

© National Instruments Corporation

G-3

LabVIEW Order Analysis Toolset User Manual

order curves

The high power density curves in a spectral map which indicate order
components.

orthogonal-like Gabor
transform pair

The pair is composed of a Gabor transform and a Gabor expansion when
the Gabor coefficients c

m, n

found by each method are the projection of the

signal on the synthesis window function h[k].

over sampling

Occurs in a Gabor transform when the window length is greater than the
window shift step. In over sampling, the number of Gabor coefficients c

m, n

is more than the number of original data samples s[k].

R

resampling

A method to sample a time sequence at a different time interval.

RMS

Root mean square.

RPM

Revolutions per minute.

S

STFT

Short time Fourier transform.

W

window shift step

The shortest time interval between two windows. In the LabVIEW Order
Analysis Toolset, it is always equal to a quarter (0.25) of the window
length. For example, if the window length is 2,048, the window shift is 512.

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