Results 31 to 40 of about 3,305 (281)
Fractional fourier transform based monopulse radar for combating jamming interference
, 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).
S.A. Elgamel +3 more
core +1 more source
, 2022 By combining fractional Fourier transform with discrete fractional angular transform, a double-image encryption algorithm is designed. The discrete cosine transform is performed on two grayscale images to generate a spectrum image, and then the generated
Chen, Su-Hua +4 more
core +1 more source
Engineering Science and Technology, an International Journal, 2021 The paper proposes an unplanned island detection method in a microgrid with micro phasor measurement unit (μPMU). The μPMU extracts certain features, by using multi domain nature of discrete fractional Fourier transform, from measured voltage data and ...
Soham Dutta +2 more
doaj +1 more source
MetrologyAccurate and efficient frequency estimation is essential in many scientific fields and has led to the development of various algorithms. Commonly used methods involve applying the Discrete Fourier Transform followed by spectral interpolation.
Fernando M. Janeiro, Pedro M. Ramos
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Image encryption using fractional integral transforms: Vulnerabilities, threats, and future scope
Frontiers in Applied Mathematics and Statistics, 2022 With the enormous usage of digital media in almost every sphere from education to entertainment, the security of sensitive information has been a concern.
Gurpreet Kaur +2 more
doaj +1 more source
A Workflow to Accelerate Microstructure‐Sensitive Fatigue Life Predictions
Advanced Engineering Materials, EarlyView.This study introduces a workflow to accelerate predictions of microstructure‐sensitive fatigue life. Results from frameworks with varying levels of simplification are benchmarked against published reference results. The analysis reveals a trade‐off between accuracy and model complexity, offering researchers a practical guide for selecting the optimal ...
Luca Loiodice +2 more
wiley +1 more source
Using EMD-FrFT filtering to mitigate high power interference in chirp tracking radars
, 2011 This letter presents a new signal processing subsystem for conventional monopulse tracking radars that offers an improved solution to the problem of dealing with manmade high power interference (jamming).
Soraghan, John +3 more
core +1 more source
The discrete harmonic oscillator, Harper's equation, and the discrete fractional Fourier transform [PDF]
, 2000 Certain solutions to Harper's equation are discrete analogues of (and approximations to) the Hermite-Gaussian functions. They are the energy eigenfunctions of a discrete algebraic analogue of the harmonic oscillator, and they lead to a definition of a ...
Özaktaş, Haldun M. +4 more
core +2 more sources
A CLOSED-FORM DISCRETE FRACTIONAL GABOR EXPANSION
Electrica, 2003 We present a discrete fractional Gabor expansion based on the closed form discrete fractional Fourier transform. The traditional Gabor expansion represents a signal as a linear combination of time and frequency shifted basis functions.
Erol ÖNEN, Aydın AKAN
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Design of fractional order differentiator using type-III and type-IV discrete cosine transform
Engineering Science and Technology, an International Journal, 2017 In this paper, an interpolation method based on discrete cosine transform (DCT) is employed for digital finite impulse response-fractional order differentiator (FIR-FOD) design. Here, a fractional order digital differentiator is modeled as finite impulse
Manjeet Kumar, Tarun Kumar Rawat
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