Results 21 to 30 of about 1,139,003 (330)

Fractional Hartley Transform and its Inverse

open access: yesمجلة بغداد للعلوم, 2023
The Hartley transform generalizes to the fractional Hartley transform (FRHT) which gives various uses in different fields of image encryption. Unfortunately, the available literature of fractional Hartley transform is unable to provide its inversion ...
Vasant Gaikwad
doaj   +1 more source

Design and Simulation of a Low-Power and High-Speed Fast Fourier Transform for Medical Image Compression

open access: yesEngineering Proceedings, 2023
For front-end wireless applications in small battery-powered devices, discrete Fourier transform (DFT) is a critical processing method for discrete time signals. Advanced radix structures are created to reduce the impact of transistor malfunction.
Ernest Ravindran Ramaswami Sachidanandan   +2 more
doaj   +1 more source

The class of Clifford-Fourier transforms [PDF]

open access: yes, 2011
Recently, there has been an increasing interest in the study of hypercomplex signals and their Fourier transforms. This paper aims to study such integral transforms from general principles, using 4 different yet equivalent definitions of the classical ...
De Bie, H., De Schepper, N., Sommen, F.
core   +3 more sources

Nuclear Fourier Transforms

open access: yesJournal of Fourier Analysis and Applications, 2023
AbstractThe paper deals with the problem under which conditions for the parameters $$s_1,s_2\in \mathbb R$$ s 1 , s 2 ∈
Dorothee D. Haroske   +2 more
openaire   +2 more sources

Fast Fourier transform revisited

open access: yesLietuvos Matematikos Rinkinys, 2015
Using FFT (fast Fourier transform), it is assumed, that some signal samples in a respective period N are updated by a sensor in real time. It is urgent for every new signal sample to have new frequency samples (f.s.).
Rimantas Pupeikis
doaj   +1 more source

Fractional Fourier Transform: Main Properties and Inequalities

open access: yesMathematics, 2023
The fractional Fourier transform is a natural generalization of the Fourier transform. In this work, we recall the definition of the fractional Fourier transform and its relation to the conventional Fourier transform.
Mawardi Bahri   +1 more
doaj   +1 more source

Some Essential Relations for the Quaternion Quadratic-Phase Fourier Transform

open access: yesMathematics, 2023
Motivated by the fact that the quaternion Fourier transform is a powerful tool in quaternion signal analysis, here, we study the quaternion quadratic-phase Fourier transform, which is a generalized version of the quaternion Fourier transform.
Mawardi Bahri   +1 more
doaj   +1 more source

Tempered distributions and Fourier transform on the Heisenberg group [PDF]

open access: yes, 2017
The final goal of the present work is to extend the Fourier transform on the Heisenberg group $\H^d,$ to tempered distributions. As in the Euclidean setting, the strategy is to first show that the Fourier transform is an isomorphism on the Schwartz space,
Bahouri, Hajer   +2 more
core   +3 more sources

Large-Scale Discrete Fourier Transform on TPUs

open access: yesIEEE Access, 2021
In this work, we present two parallel algorithms for the large-scale discrete Fourier transform (DFT) on Tensor Processing Unit (TPU) clusters. The two parallel algorithms are associated with two DFT formulations: one formulation, denoted as KDFT, is ...
Tianjian Lu   +4 more
doaj   +1 more source

New Algorithm for Real-Valued Fourier Transform

open access: yesTikrit Journal of Engineering Sciences, 2023
This paper presents a direct algorithm for fast real discrete Fourier transform (RDFT) computing, using the discrete Fourier transform (DFT) conjugate symmetric property to reduce redundancies.
Sukaina K. Salih, Mounir T. Hamood
doaj   +1 more source

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