Accession Number : ADA261839


Title :   Pseudo Wigner-Ville Distribution, Computer Program and its Applications to Time-Frequency Domain Problems


Descriptive Note : Rept. for 1 Oct 92-28 Feb 93


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF MECHANICAL ENGINEERING


Personal Author(s) : Jeon, Jae-Jin ; Shin, Young S


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a261839.pdf


Report Date : 01 Mar 1993


Pagination or Media Count : 87


Abstract : Machinery operating in non-stationary mode generates a signature which at each instant of time has a distinct frequency. A time-frequency domain representation is needed to characterize such signature. Pseudo Wigner-Ville distribution is ideally suited for portraying non-stationary signal in the time- frequency domain and carried out by adapting the fast Fourier transform algorithm. The important parameters affecting the pseudo Wigner-Ville distribution are discussed and sensitivity analyses are also performed. Practical examples of an actual transient signal are used to illustrate its dynamic features jointly in time and frequency. Pseudo Wigner-Ville distribution, Analytic signal, Hilbert transform, Gaussian window, Time- frequency domain.


Descriptors :   *COMPUTER PROGRAMS , *SIGNAL PROCESSING , *LIFE EXPECTANCY(SERVICE LIFE) , *MACHINES , *TIME DOMAIN , *FREQUENCY DOMAIN , *TIME SIGNALS , *DISTRIBUTION FUNCTIONS , ALGORITHMS , FREQUENCY , INPUT , TRANSIENTS , DYNAMICS , PARAMETERS , SENSITIVITY , TIME , THREE DIMENSIONAL , STATIONARY , WINDOWS , SIGNATURES , FAST FOURIER TRANSFORMS , COMPUTER AIDED DIAGNOSIS


Subject Categories : Statistics and Probability
      Computer Programming and Software
      Machinery and Tools


Distribution Statement : APPROVED FOR PUBLIC RELEASE