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- Cagatay Candan, M. Alper Kutay, Haldun M. Özaktas
- ICASSP
- 1999

—We propose and consolidate a definition of the discrete fractional Fourier transform that generalizes the discrete Fourier transform (DFT) in the same sense that the continuous fractional Fourier transform generalizes the continuous ordinary Fourier transform. This definition is based on a particular set of eigenvectors of the DFT matrix, which constitutes… (More)

- Haldun M. Özaktas, Orhan Arikan, M. Alper Kutay, Gozde Bozdagi Akar
- IEEE Trans. Signal Processing
- 1996

- M. Alper Kutay, Haldun M. Özaktas, Levent Onural, Orhan Arikan
- ICASSP
- 1995

performance is achieved at no additional cost. Expressions for the optimal filter functions in fractional domains are derived, and several illustrative examples are given in which significant reduction of the error (by a factor of 50) is obtained.

- David A. B. Miller, Haldun M. Özaktas
- J. Parallel Distrib. Comput.
- 1997

We show that there is a limit to the total number of bits per second, B, of information that can flow in a simple digital electrical interconnection that is set only by the ratio of the length " of the interconnection to the total cross-sectional dimension A of the interconnect wiring — the " aspect ratio " of the interconnection. This limit is largely… (More)

- A. Koc, Haldun M. Özaktas, Cagatay Candan, M. Alper Kutay
- IEEE Transactions on Signal Processing
- 2008

We deal with the problem of efficient and accurate digital computation of the samples of the linear canonical transform (LCT) of a function, from the samples of the original function. Two approaches are presented and compared. The first is based on decomposition of the LCT into chirp multiplication, Fourier transformation, and scaling operations. The second… (More)

- Ayça Özçelikkale, Haldun M. Özaktas, Erdal Arikan
- IEEE Transactions on Signal Processing
- 2010

We are concerned with the problem of optimally measuring an accessible signal under a total cost constraint, in order to estimate a signal which is not directly accessible. An important aspect of our formulation is the inclusion of a measurement device model where each device has a cost depending on the number of amplitude levels that the device can… (More)

- M. Fatih Erden, M. Alper Kutay, Haldun M. Özaktas
- IEEE Trans. Signal Processing
- 1999

A new IIR Nyquist filter with zero intersymbol interference and its frequency response approximation, " IEEE Trans. , " Recursive Nth-band digital filters—Part II: Design of multistage decimators and interpolators, " IEEE Trans. Abstract— Filtering in a single time domain or in a single frequency domain has recently been generalized to filtering in a single… (More)

- Ayça Özçelikkale, Gozde Bozdagi Akar, Haldun M. Özaktas
- 2010 IEEE International Conference on Image…
- 2010

In this paper, we study the effect of limited amplitude resolution (pixel depth) in super-resolution problem. The problem we address differs from the standard super-resolution problem in that amplitude resolution is considered as important as spatial resolution. We study the trade-off between the pixel depth and spatial resolution of low resolution (LR)… (More)

- Haldun M. Özaktas, Orhan Aytür
- Signal Processing
- 1995

It is customary to define the time-frequency plane such that time and frequency are mutually orthogonal coordinates. Representations of a signal in these domains are related by the Fourier transform. We consider a continuum of " fractional " domains making arbitrary angles with the time and frequency domains. Representations in these domains are related by… (More)

- Cagatay Candan, Haldun M. Özaktas
- Signal Processing
- 2003

We present much briefer and more direct and transparent derivations of some sampling and series expansion relations for fractional Fourier and other transforms. In addition to the fractional Fourier transform, the method can also be applied to the Fresnel, Hartley, and scale transform and other relatives of the Fourier transform. ? 2003 Published by… (More)