Results 31 to 40 of about 1,921,662 (293)

Extended Smoothing Methods for Sparse Test Data Based on Zero-Padding

open access: yesApplied Sciences, 2023
Aiming at the problem of sparse measurement points due to test conditions in engineering, a smoothing method based on zero-padding in the wavenumber domain is proposed to increase data density.
Pan Zhou   +5 more
doaj   +1 more source

Comparisons of the execution times and memory requirements for high-speed discrete fourier transforms and fast fourier transforms, for the measurement of AC power harmonics [PDF]

open access: yes, 2011
Conventional wisdom dictates that a Fast Fourier Transform (FFT) will be a more computationally effective method for measuring multiple harmonics than a Discrete Fourier Transform (DFT) approach.
Burt, G. M., Roscoe, A. J.
core   +4 more sources

Design And Implementation Of Radix-4 Fast Fourier Transform In Asia Chip With 0.18 M Standard CMOS Technology [TK5102.9. S624 2008 f rb]. [PDF]

open access: yes, 2008
Jelmaan Fourier pantas (FFT) merupakan blok yang penting dan digunakan secara meluas dalam algoritma pemprosesan isyarat digital. The Fast Fourier Transform (FFT) is a critical block and widely used in digital signal processing ...
Palaniappan, Siva Kumar
core   +1 more source

Simplified approach to DFT computation for nonprogrammable scientific calculators

open access: yesBibechana, 2014
Fourier analysis is an important tool used as it is or it’s different variants in many fields of sciences and engineering. It’s importance is due to it’s simplicity with which it expands a given function in terms of circular or complex exponents ...
Mohd Yusuf Yasin
doaj   +3 more sources

Sensing Fractional Power Spectrum of Nonstationary Signals with Coprime Filter Banks

open access: yesComplexity, 2020
The coprime discrete Fourier transform (DFT) filter banks provide an effective scheme of spectral sensing for wide-sense stationary (WSS) signals in case that the sampling rate is far lower than the Nyquist sampling rate.
Xiaomin Li   +3 more
doaj   +1 more source

Image compression based on 2D Discrete Fourier Transform and matrix minimization algorithm

open access: yesArray, 2020
In the present era of the internet and multimedia, image compression techniques are essential to improve image and video performance in terms of storage space, network bandwidth usage, and secure transmission.
M. Rasheed   +3 more
semanticscholar   +1 more source

Fractional fourier transform based monopulse radar for combating jamming interference [PDF]

open access: yes, 2010
Monopulse radars are used to track a target that appears in the look direction beam width. The distortion produced when manmade high power interference (jamming).
Elgamel, Sherif A.E.H., Soraghan, J.J.
core   +4 more sources

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

Reduced hardware costs with software and hardware implementation of digital methods multistage discrete Fourier transform on programmable logic devices

open access: yesRevista Amazonía investiga, 2020
Let us consider questions, which are connected to the research of terms of hardware and software implementation digital signal processing (DSP) methods. Theoretical basis of this research are methods of non-recursive difference of digital filtration with
A. Burova   +2 more
semanticscholar   +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

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