Title :
Modified Gabor Wigner Transform for Crisp Time Frequency Representation
Author :
Khan, Nabeel Ali ; Jaffri, M. Noman ; Shah, Syed Ismail
Author_Institution :
Dept. of Electr. Eng., Fed. Urdu Univ., Islamabad, Pakistan
Abstract :
Gabor Wigner transform (GWT) avoids the cross terms and gives high clarity in time frequency (t-f) domain.The transform is however unable to provide a clear picture in situations when auto and cross components of Wigner transform of the multi component signal overlap. This paper presents a new simple hybrid approach that overcomes the limitations of GWT in an efficient manner by making use of fractional Fourier transform and image processing technique.Experimental results demonstrate superiority of proposed scheme.
Keywords :
Fourier transforms; Gabor filters; Wigner distribution; image segmentation; crisp time frequency representation; fractional Fourier transform; image processing; modified Gabor Wigner transform; multicomponent signal overlap; Chirp modulation; Filters; Fourier transforms; Image processing; Image segmentation; Mathematical analysis; Signal analysis; Signal processing; Spectrogram; Time frequency analysis; Fractional Fourier transform; Gabor Transform; Gabor Wigner transform; Wigner Transform;
Conference_Titel :
Signal Acquisition and Processing, 2009. ICSAP 2009. International Conference on
Conference_Location :
Kuala Lumpur
Print_ISBN :
978-0-7695-3594-4
DOI :
10.1109/ICSAP.2009.14
