Results 21 to 30 of about 257,484 (138)
Eigenvectors of the Discrete Fourier Transform Based on the Bilinear Transform
EURASIP Journal on Advances in Signal Processing, 2010 Determining orthonormal eigenvectors of the DFT matrix, which is closer to the samples of Hermite-Gaussian functions, is crucial in the definition of the discrete fractional Fourier transform.
Ahmet Serbes, Lutfiye Durak-Ata
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A New Pseudo-Spectral Method Using the Discrete Cosine Transform
Journal of Imaging, 2020 The pseudo-spectral (PS) method on the basis of the Fourier transform is a numerical method for estimating derivatives. Generally, the discrete Fourier transform (DFT) is used when implementing the PS method. However, when the values on both sides of the
Izumi Ito
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An approach to power system harmonic analysis based on triple-line interpolation discrete Fourier transform [PDF]
Archives of Electrical Engineering, 2022 The discrete Fourier transform (DFT) is a principal method for power system harmonic analysis. The fundamental frequency of the power system increases or decreases following load changes during normal operation.
Ling Liu, Jinsong Zhang
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Discrete Two-Dimensional Fourier Transform in Polar Coordinates Part I: Theory and Operational Rules
Mathematics, 2019 The theory of the continuous two-dimensional (2D) Fourier transform in polar coordinates has been recently developed but no discrete counterpart exists to date.
Natalie Baddour
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Comparison of Image Compressions: Analog Transformations
Proceedings, 2020 A comparison between the four most used transforms, the discrete Fourier transform (DFT), discrete cosine transform (DCT), the Walsh–Hadamard transform (WHT) and the Haar-wavelet transform (DWT), for the transmission of analog images, varying their ...
Jose Balsa
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Exact Fourier Spectrum Recovery [PDF]
Physics Letters A, 377(1-2), 1-6 (2012), 2013 Discrete Fourier Transform (DFT) is widely used in signal processing to analyze the frequencies in a discrete signal. However, DFT fails to recover the exact Fourier spectrum, when the signal contains frequencies that do not correspond to the sampling grid.
arxiv +1 more source
Simplified approach to DFT computation for nonprogrammable scientific calculators
Bibechana, 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
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Extended Smoothing Methods for Sparse Test Data Based on Zero-Padding
Applied 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
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Joint Channel Estimation Algorithm Based on DFT and DWT
Applied Sciences, 2022 Channel estimation is an important component of orthogonal frequency division multiplexing (OFDM) systems. The existence of virtual subcarriers leads to energy spreading in the time-domain when using Inverse Fast Fourier Transform (IFFT), resulting in ...
Zhe Zhang, Xin Bian, Mingqi Li
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New single-carrier transceiver scheme based on the discrete sine transform
The 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
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