Title :
Pseudo affine Wigner distributions
Author :
Goncalvès, Paulo ; Baraniuk, Richard G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Rice Univ., Houston, TX, USA
Abstract :
We define a new set of tools for time-varying spectral analysis: the pseudo affine Wigner distributions. Based on the affine Wigner distributions of J. and P. Bertrand (1992), these new time-frequency distributions support efficient online operation at the same computational cost as the continuous wavelet transform. Moreover, they take advantage of the proportional bandwidth smoothing inherent in the sliding structure of their implementation to suppress cumbersome interference components. To formalize their place within the echelon of the affine class of time-frequency distributions, we extend the definition of this class and introduce other natural generators
Keywords :
Wigner distribution; interference suppression; smoothing methods; spectral analysis; time-frequency analysis; time-varying systems; wavelet transforms; affine class; computational cost; continuous wavelet transform; interference components suppression; natural generators; online operation; proportional bandwidth smoothing; pseudoaffine Wigner distributions; signal analysis; sliding structure; time-frequency distributions; time-varying spectral analysis; Bandwidth; Computational efficiency; Continuous wavelet transforms; Interference; Radar applications; Signal analysis; Smoothing methods; Spectral analysis; Time frequency analysis; Wavelet transforms;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3192-3
DOI :
10.1109/ICASSP.1996.543928
