Browsing by Author "Kutay, M. Alper"
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The discrete fractional Fourier transform
Candan, Çağatay; Kutay, M. Alper; Özaktaş, Haldun M. (IEEE, 1999)We propose and consolidate a definition of the discrete fractional Fourier transform which generalizes the discrete Fourier transform (DFT) in the same sense that the continuous fractional Fourier transform (FRT) generalizes ... -
The discrete fractional Fourier transformation
Arıkan, Orhan; Kutay, M. Alper; Özaktaş, Haldun M.; Akdemir, Özer Koray (IEEE, 1996)Based on the fractional Fourier transformation of sampled periodic functions, the discrete form of the fractional Fourier transformation is obtained. It is found that only for a certain dense set of fractional orders such ... -
Enhancement of images corrupted with signal dependent noise: Application to ultrasonic imaging
Kutay, M. Alper; Karaman, Mustafa; Bozdağı, Gözde (1993-11)An adaptive filter for smoothing images corrupted by signal dependent noise is presented. The filter is mainly developed for speckle suppression in medical B-scan ultrasonic imaging. The filter is based on mean filtering ... -
Optimal filtering in fractional Fourier domains
Kutay, M. Alper; Onural, Levent; Özaktaş Haldun M.; Arıkan, Orhan (IEEE, 1995)The ordinary Fourier transform is suited best for analysis and processing of time-invariant signals and systems. When we are dealing with time-varying signals and systems, filtering in fractional Fourier domains might allow ... -
Solution and cost analysis of general multi-channel and multi-stage filtering circuits
Kutay, M. Alper; Arıkan, Orhan; Özaktaş, Haldun M.; Erden, M. F.; Özaktaş, Hakan (IEEE, 1998-10)The fractional Fourier domain multi-channel and multi-stage filtering configurations that have been recently proposed enable us to obtain either exact realizations or useful approximations of linear systems or matrix-vector ...