Results 21 to 30 of about 8,473 (273)

The discrete fractional Fourier transform [PDF]

open access: yes, 1999
Date of Conference: 15-19 March 1999Conference Name: 24th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 1999We propose and consolidate a definition of the discrete fractional Fourier transform which generalizes the ...
Özaktaş, Haldun M.   +2 more
core   +1 more source

New single-carrier transceiver scheme based on the discrete sine transform

open access: yesThe Journal of Engineering, 2014
A discrete sine transform (DST)-based single-carrier transceiver scheme for broadband wireless communications is proposed and investigated. The proposed scheme uses a DST rather than the conventional discrete Fourier transform (DFT) as a basis function ...
Faisal Al-kamali
doaj   +1 more source

Analisis Watermarking Menggunakan Metode Discrete Cosine Transform (DCT) dan Discrete Fourier Transform (DFT)

open access: yesJurnal Sistem Cerdas, 2022
Digital image watermarking is the insertion of watermarks into digital image media. Several types of watermarking methods used are Discrete Cosine Transform (DCT) and Discrete Fourier Transform (DFT). Both of these watermarking methods work in the frequency domain (transform).
null Mukhammad Solikhin   +4 more
openaire   +1 more source

More on algebraic properties of the discrete Fourier transform raising and lowering operators★

open access: yes4 open, 2019
In the present work, we discuss some additional findings concerning algebraic properties of the N-dimensional discrete Fourier transform (DFT) raising and lowering difference operators, recently introduced in [Atakishiyeva MK, Atakishiyev NM (2015), J ...
Atakishiyeva Mesuma K.   +2 more
doaj   +1 more source

The Discrete Fourier Transform (DFT) in Behavioural Analysis

open access: yesJournal of Theoretical Biology, 1994
Abstract Spectral analysis is an important tool for examining time-series data and can be particularly powerful in detecting periodicity in animal behaviour patterns. Because of its simplicity and the speed of current computing algorithms, the discrete Fourier transform is most often used in spectral analysis.
T.G. Forrest, Robert B. Suter
openaire   +1 more source

Four Particular Cases of the Fourier Transform

open access: yesMathematics, 2018
In previous studies we used Laurent Schwartz’ theory of distributions to rigorously introduce discretizations and periodizations on tempered distributions.
Jens V. Fischer
doaj   +1 more source

Finite-Element Model Reduction of Surface-Mounted Permanent Magnet Machines by Exploitation of Geometrical Periodicity [PDF]

open access: yes, 2018
This paper presents a methodology that allows taking advantage of the geometrical periodicity of electrical machines together with the modeling of rotor motion.
AL EIT, Moustafa   +5 more
core   +1 more source

Fast Radix-32 Approximate DFTs for 1024-Beam Digital RF Beamforming

open access: yesIEEE Access, 2020
The discrete Fourier transform (DFT) is widely employed for multi-beam digital beamforming. The DFT can be efficiently implemented through the use of fast Fourier transform (FFT) algorithms, thus reducing chip area, power consumption, processing time ...
Arjuna Madanayake   +8 more
doaj   +1 more source

Efficient analysis of phased arrays of microstrip patches using a hybrid generalized forward backward method/Green's function technique with a DFT based acceleration algorithm [PDF]

open access: yes, 2008
A hybrid method based on the combination of generalized forward backward method (GFBM) and Green's function for the grounded dielectric slab together with the acceleration of the combination via a discrete Fourier transform (DFT) based algorithm is ...
Aydın Çivi, Hatice Özlem   +5 more
core   +1 more source

Discrete Fourier transform based frequency characteristics of iterative learning control for linear discrete-time systems

open access: yesAdvances in Difference Equations, 2019
For discrete-time iterative learning control systems, the discrete Fourier transform (DFT) is a powerful technique for frequency analysis, and Toeplitz matrices are a typical tool for the system input–output transmission.
Xiaohui Li, Xiaoe Ruan
doaj   +1 more source

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