White, Paul R. (2002) Time-frequency methods. In, Braun, Simon G., Ewins, David J. and Rao, Singiresu S. (eds.) Encyclopedia of vibrartion. London. Academic Press, pp. 1360-1369. (doi:10.1006/rwvb.2001.0056).
Abstract
Nomenclature
A(f)
Fourier transform of a(t)
B(f)
Fourier transform of b(t)
f
frequency variable
h(t)
arbitrary function
P(t,f)
time-frequency distribution
r(?)
instantaneous correlation function
S(t,f)
spectrogram
x(t)
signal
X(f)
Fourier transform of x(t)
midX(f)mid2
signal spectrum
?(t)
Dirac delta function
?(t,f)
kernel function
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