The Wigner-Ville distribution (WD) is particularly used for time-frequency analysis of nonstationary signals. This paper proposes the application of the smoothed version of the WD to design an innovative virtual instrument (VI) which can be used as a spectral analyzer. Our work focuses on the computational algorithms that meet several essential requirements for implementation, such as high time-frequency resolution, precision, flexibility, and computational efficiency. An original interpolation formula is derived, to overcome the negative effects due to leakage. Following this, a simple WD implementation on the designed VI is proposed and a series of numerical checks is show, to suitably characterize the new instrument.
An SPWD-Based Instrument for Accurate Spectral Analyses / Andria, G.; Sabia, N.; Savino, M.. - STAMPA. - (1994), pp. 725-728. (Intervento presentato al convegno Instrumentation and Measurement Technology Conference - Advanced Technologies in I and M, IMTC/94 tenutosi a Hamamatsu, Japan nel May 10-12, 1994) [10.1109/IMTC.1994.351998].
An SPWD-Based Instrument for Accurate Spectral Analyses
G. Andria;M. Savino
1994-01-01
Abstract
The Wigner-Ville distribution (WD) is particularly used for time-frequency analysis of nonstationary signals. This paper proposes the application of the smoothed version of the WD to design an innovative virtual instrument (VI) which can be used as a spectral analyzer. Our work focuses on the computational algorithms that meet several essential requirements for implementation, such as high time-frequency resolution, precision, flexibility, and computational efficiency. An original interpolation formula is derived, to overcome the negative effects due to leakage. Following this, a simple WD implementation on the designed VI is proposed and a series of numerical checks is show, to suitably characterize the new instrument.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
