L. Stankovic, A METHOD FOR IMPROVED DISTRIBUTION CONCENTRATION IN THE TIME-FREQUENCY ANALYSIS OF MULTICOMPONENT SIGNALS USING THE L-WIGNER DISTRIBUTION, IEEE transactions on signal processing, 43(5), 1995, pp. 1262-1268
The energy location in the Cohen class of time-frequency distributions
is analyzed, If the instantaneous frequency is linear, then only the
Wigner distribution produces the ideal energy concentration, The scale
d version of the Wigner distribution (L-Wigner distribution), is used
to improve the time-frequency representation of signals with nonlinear
instantaneous frequencies. In the case of multicomponent signals, the
cross terms, appearing in the Wigner distribution and in the L-Wigner
distribution, can be easily removed or reduced in a computationally v
ery efficient way. The theory is illustrated on the numerical examples
with multicomponent noisy signals.