Results 21 to 30 of about 129,078 (307)
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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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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Arbitrary Sampling Fourier Transform and Its Applications in Magnetic Field Forward Modeling
Applied Sciences, 2022 Numerical simulation and inversion imaging are essential in geophysics exploration. Fourier transform plays a vital role in geophysical numerical simulation and inversion imaging, especially in solving partial differential equations.
Shikun Dai +4 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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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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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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Cortical Specification of a Fast Fourier Transform Supports a Convolution Model of Visual Perception [PDF]
, 2012 Currently, the full extent of the role Fourier analysis plays in biological vision is unclear. Although we have examples of sensory organs that perform Fourier transforms, e.g.
Phillip Sheridan, Sheridan, Phillip
core +1 more source
A Fast Fourier Transform for the Johnson Graph
Journal of Fourier Analysis and Applications, 2022 21 pages, 8 figures.
Rodrigo Iglesias, Mauro Natale
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A Multi-Resolution Texture Image Retrieval Using Fast Fourier Transform
The Journal of Engineering Research, 2010 Texture is an important visual property that characterizes a wide range of natural and artificial images which makes it a useful feature for retrieving images. Several approaches have been proposed to describe the texture contents of an image.
A. Abdesselam
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REVISED FAST FOURIER TRANSFORM
Radio Electronics, Computer Science, Control, 2014 The problem of realisation of the Discrete Fourier Transform in on-line is analysed because of non-efficient consuming a time for a new recalculation of spectrum samples if one discrete-time signal sample or even some small portion of samples in period are replaced by new sample or by new samples, respectively.
openaire +4 more sources