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Interpolated smoothed pseudo Wigner-Ville distribution for accurate spectrum analysis

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2 Author(s)
G. Andria ; Dipartimento di Elettrotecnica ed Elettronica, Politecnico di Bari, Italy ; M. Savino

This paper deals with a new application of the time-domain windowed (smoothed version) of the pseudo Wigner-Ville distribution (PWD), that can be easily implemented in a dedicate digital instrument to be used as a spectral analyzer for time-frequency analysis of nonstationary signals. New computational algorithms are studied and developed to attain high time-frequency resolution, accuracy, flexibility and computational efficiency. Particularly, to reduce the negative effects due to leakage during frequency changes, a new interpolation formula is derived by using the windowing theory. The suggested technique allows the users to perform optimal evaluations of the instantaneous amplitudes and frequencies of analyzed signals

Published in:

IEEE Transactions on Instrumentation and Measurement  (Volume:45 ,  Issue: 4 )