Results 21 to 30 of about 15,774 (263)
Logarithm of the Discrete Fourier Transform
International Journal of Mathematics and Mathematical Sciences, 2007 The discrete Fourier transform defines a unitary matrix operator. The logarithm of this operator is computed, along with the projection maps onto its eigenspaces. A geometric interpretation of the discrete Fourier transform is also given.
Michael Aristidou, Jason Hanson
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Hybrid semi analytical method for geothermal U shaped heat exchanger
Case Studies in Thermal Engineering, 2018 In this paper, convective-conductive heat transfer processes between the all components of geothermal borehole heat exchanger (BHE) such as pipe-in, pipe-out and grout have been studied.
P. Jalili, D.D. Ganji, S.S. Nourazar
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Comparison of discrete transforms for deep‐neural‐networks‐based speech enhancement
IET Signal Processing, 2022 In recent studies of speech enhancement, a deep‐learning model is trained to predict clean speech spectra from the known noisy spectra of speech. Rather than using the traditional discrete Fourier transform (DFT), this paper considers other well‐known ...
Wissam A. Jassim, Naomi Harte
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A Variable-Scale Coherent Integration Method for Moving Target Detection in Wideband Radar
Remote Sensing, 2022 Accurate integration of the extended target’s energy is one of the important challenges of moving target detection in wideband radar. In this paper, a coherent integration method for wideband radar, i.e., variable-scale moving target detection (VSMTD ...
Tingkun Lu, Feng He, Lei Yu, Manqing Wu
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Random Access Preamble Generation with Low Storage for LTE Networks
ITM Web of Conferences, 2017 Long Term Evolution (LTE) random access preambles are generated from cyclically shifted Zadoff-Chu(ZC) sequences of prime length by using so-called Discrete Fourier Transformation-Spread-Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) modulation.
Xin Pei-Zhe +3 more
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Proceedings of the International Conference on Applied Innovations in IT, 2014 In this paper we investigate various algorithms for performing Fast Fourier Transformation (FFT)/Inverse Fast Fourier Transformation (IFFT), and proper techniques for maximizing the FFT/IFFT execution speed, such as pipelining or parallel processing, and
Danijela Efnusheva +3 more
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IET Power Electronics, 2022 Bidirectional synchronized transfer (BST) in variable frequency drive (VFD) systems implies automatic synchronization with seamless transfer of the motor to the grid or take‐over of the motor from the grid.
Ali Keshavarzian +5 more
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Uncertainty Relation for the Discrete Fourier Transform [PDF]
Physical Review Letters, 2008 We derive an uncertainty relation for two unitary operators which obey a commutation relation of the form UV=exp[i phi] VU. Its most important application is to constrain how much a quantum state can be localised simultaneously in two mutually unbiased bases related by a Discrete Fourier Transform.
Massar, Serge, Spindel, Philippe
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Fast calculation algorithm for discrete resonance-based band-pass filter
Alexandria Engineering Journal, 2016 A discrete resonant band-pass filter with a fast calculation algorithm, which can be used to perform discrete frequency transformations, is presented. The algorithm has low memory consumption requirements.
Toso Pankovski
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Современная наука и инновации, 2022 When using a discrete Fourier transform (DFT) to solve digital signal processing (DSP) problems, errors occur in rounding or truncating the results of operations to the word length used by specialized processors (SP).
M. I. Kalmykov +3 more
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