Results 11 to 20 of about 2,939,069 (250)

Quadratic discrete Fourier transform and mutually unbiased bases [PDF]

open access: yes, 2010
36 pages, submitted for publication in "Fourier Transforms, Theory and Applications", G. Nikolic (Ed.), InTech (Open Access Publisher), Vienna, 2011 - ISBN 978-953-307-231-9The present chapter [submitted for publication in "Fourier Transforms, Theory and
Kibler, Maurice Robert
core   +4 more sources

Fourier transform of a discrete signal

open access: yes, 2023
U ovom radu obrađuje se diskretna Fourierova transformacija, navode se njena matematička svojstva i primjena. U uvodnom dijelu rada objašnjen je matematički tretman signala i njihova klasifikacija te su navedeni neki klasični modeli signala.
Tomljanović, Iva
core   +2 more sources

Dispersive Fourier Transformation for Versatile Microwave Photonics Applications [PDF]

open access: yes, 2014
: Dispersive Fourier transformation (DFT) maps the broadband spectrum of an ultrashort optical pulse into a time stretched waveform with its intensity profile mirroring the spectrum using chromatic dispersion.
Wang, Chao, Chao Wang
core   +1 more source

Trigonometric Interpolation Using the Discrete Fourier Transform [PDF]

open access: yes, 2022
The Fourier transform (and all its versions, discrete/continuous/finite/infinite), covers deep and abstract mathematical concepts, and can easily overwhelm with detail.
Ponce Campuzano, Juan Carlos
core  

Integrated representation for discrete Fourier and wavelet transforms using vector notation

open access: yesMehran University Research Journal of Engineering and Technology, 2022
Many mathematical operations are implemented easily through transform domain operations. Multiple transform domain operations are used independently in large and complex applications.
Tariq Javid   +3 more
doaj   +1 more source

Comparison of discrete transforms for deep‐neural‐networks‐based speech enhancement

open access: yesIET Signal Processing, 2022
In recent studies of speech enhancement, a deep‐learning model is trained to predict clean speech spectra from the known noisy spectra of speech. Rather than using the traditional discrete Fourier transform (DFT), this paper considers other well‐known ...
Wissam A. Jassim, Naomi Harte
doaj   +1 more source

A Variable-Scale Coherent Integration Method for Moving Target Detection in Wideband Radar

open access: yesRemote Sensing, 2022
Accurate integration of the extended target’s energy is one of the important challenges of moving target detection in wideband radar. In this paper, a coherent integration method for wideband radar, i.e., variable-scale moving target detection (VSMTD ...
Tingkun Lu, Feng He, Lei Yu, Manqing Wu
doaj   +1 more source

Discrete Fourier transformation processor based on complex radix (−1 + j) number system

open access: yesEngineering Science and Technology, an International Journal, 2017
Complex radix (−1 + j) allows the arithmetic operations of complex numbers to be done without treating the divide and conquer rules, which offers the significant speed improvement of complex numbers computation circuitry.
Anidaphi Shadap, Prabir Saha
doaj   +1 more source

A novel bidirectional synchronized transfer method for multilevel electric drive systems based on discrete Fourier transformation

open access: yesIET Power Electronics, 2022
Bidirectional synchronized transfer (BST) in variable frequency drive (VFD) systems implies automatic synchronization with seamless transfer of the motor to the grid or take‐over of the motor from the grid.
Ali Keshavarzian   +5 more
doaj   +1 more source

Hybrid semi analytical method for geothermal U shaped heat exchanger

open access: yesCase Studies in Thermal Engineering, 2018
In this paper, convective-conductive heat transfer processes between the all components of geothermal borehole heat exchanger (BHE) such as pipe-in, pipe-out and grout have been studied.
P. Jalili, D.D. Ganji, S.S. Nourazar
doaj   +1 more source

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