Ah. Costa et Gf. Boudreaux-bartels, An overview of aliasing errors in discrete-time formulations of time-frequency representations, IEEE SIGNAL, 47(5), 1999, pp. 1463-1474
Recent discrete-time time-frequency representation (TFR) algorithms claim t
o provide alias-free approximations to their continuous-time TFR counterpar
ts without requiring oversampling of the signal. By counterexamples, we dem
onstrate that some of these claims are invalid. We give new necessary condi
tions for reducing aliasing errors in these discrete-time TFR algorithms.