Results 11 to 20 of about 316,193 (316)
Harmonic detection of PV power generation system based on DFFT-WT-BP
Dianzi Jishu Yingyong, 2019 The existing FFT-WT algorithm and FFT-BP algorithm have advantages only for the detection of certain specific harmonics in photovoltaic systems. In this paper, the FFT-WT algorithm is improved, and a DFFT-WT algorithm is proposed. The FFT-BP algorithm is
Sun Cheng +5 more
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Estimation of Coastal Bathymetry Using Wavelets
Journal of Marine Science and Engineering, 2020 When waves propagate in coastal areas at depths lower than one half the wavelength, they exhibit a different signature at the sea surface and the observed wavelength pattern enables inferring bathymetries.
Diogo Santos +3 more
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Advances in Mechanical Engineering, 2019 The rolling element bearing is one of the most critical components in a machine. Vibration signals resulting from these bearings imply important bearing defect information related to the machinery faults.
Hsiung-Cheng Lin, Yu-Chen Ye
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Large-scale 3D fast Fourier transform computation on a GPU
ETRI Journal, 2023 We propose a novel graphics processing unit (GPU) algorithm that can handle a large-scale 3D fast Fourier transform (i.e., 3D-FFT) problem whose data size is larger than the GPU's memory.
Jaehong Lee, Duksu Kim
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The fast Fourier Transform and fast Wavelet Transform for Patterns on the Torus [PDF]
Appl. Comp. Harmon. Anal. 35(1), p. 39-51 (2013), 2011 We introduce a fast Fourier transform on regular d-dimensional lattices. We investigate properties of congruence class representants, i.e. their ordering, to classify directions and derive a Cooley-Tukey-Algorithm. Despite the fast Fourier techniques itself, there is also the advantage of this transform to be parallelized efficiently, yielding faster ...
arxiv +1 more source
OCTAD-S: digital fast Fourier transform spectrometers by FPGA
Earth, Planets and Space, 2017 We have developed a digital fast Fourier transform spectrometer made of an analog-to-digital converter (ADC) and a field-programmable gate array (FPGA).
Kazumasa Iwai +7 more
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Reconfigurable Hyper-Parallel Fast Fourier Transform Processor Based on Bit-Serial Computing
IEEE Access, 2023 The upcoming 5G communication is committed to providing ultra-high throughput and ultra-low delay service. However, digital signal processing technologies will be a critical challenge with the increasing bandwidth and transmitting streams.
Tingyong Wu, Yuxin Wang, Fuqiang Li
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Fast Fourier Transform power spectrum of radon activity
Radiation Protection and Environment, 2018 Measurement of outdoor Radon-222 (222Rn) activity at National Atmospheric Research Laboratory (NARL), Gadanki, India, is carried out using Alpha GUARD PQ 2000 PRO from October 2011 to July 2014 and analyzed.
K Charan Kumar +3 more
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IET Radar, Sonar & Navigation, 2021 In ISAR imaging, echo signals of complex manoeuvring targets have to be modelled as multi‐component cubic phase signals (m‐CPS). In this condition, the Doppler diffusion will seriously affect the quality of ISAR imaging.
Fengkai Liu +3 more
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Fast Fourier Optimization: Sparsity Matters [PDF]
Mathematical Programming Computation, Volume 4, Number 1 (2012),
53-69, 2012 Many interesting and fundamentally practical optimization problems, ranging from optics, to signal processing, to radar and acoustics, involve constraints on the Fourier transform of a function. It is well-known that the {\em fast Fourier transform} (fft) is a recursive algorithm that can dramatically improve the efficiency for computing the discrete ...
arxiv +1 more source