Results 201 to 210 of about 51,064 (263)

Discrete Fourier Transforms: DtFT and DFT

, 2021
In this chapter we investigate a big family of Fourier transforms: continuous Fourier transform (CFT), Fourier series (FS), discrete-time Fourier transform (DtFT), and discrete Fourier transform (DFT). The DFT, in its fast form (FFT), is probably one of the most frequently used orthogonal transforms in the world apart from the discrete cosine transform
Tomasz P. Zieliński
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Flexible systolic design with asynchronous communication protocols for discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT)

SPIE Proceedings, 1994
ABSTRACT In this paper, a spiral systolic array (SA) architecture with asynchronous controls forthe real time realization of an N point DFT and [DFT is considered. The study includes theoverall system block diagram, propagation of data between array PEs, operations withineach PE, and the PE protocol for computing an N point DFT.
Kamran Reihani, Wiley E. Thompson, Yiping Fan   +2 more
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Fourier Transform Analysis of Discrete Time Signals and Systems—DTFT, DFT and FFT

, 2021
In Chap. 4, we represented continuous time periodic signals as a sum of everlasting exponentials by Fourier series. Similarly, in Chap. 5, the discrete time periodic signals was represented by discrete time Fourier series using a parallel development of continuous time system.
S. Palani
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Time-frequency scaling property of Discrete Fourier Transform (DFT)

2010 IEEE International Conference on Acoustics, Speech and Signal Processing, 2010
This paper presents the analogue of the time or frequency scaling theorem of continuous time/frequency Fourier Transform (FT) to the realm of Discrete Fourier Transform (DFT). The scaling property applies to scaling by integers which are relatively prime to the length of the DFT. The time reversal property of DFT is identified as a special case of this
Sumit A. Talwalkar, S. Lawrence Marple
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Improved power converter line synchronisation using an adaptive Discrete Fourier Transform (DFT)

2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289), 2003
The problem of line synchronisation for grid connected power converters where the grid is weak or comes from a remote area power supply with poor frequency governing, is now well recognised. Such supplies can suffer a significant amount of line voltage distortion due to notches caused by power device commutation and/or low frequency harmonic content ...
B.P. McGrath, D.G. Holmes, J. Galloway
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A novel algorithm for digital overcurrent relay using discrete Fourier transform (DFT)

7th IET International Conference on Advances in Power System Control, Operation and Management (APSCOM 2006), 2006
An over current protective relays has played very important role in maintaining reliability of a distribution system and protecting the equipment from the damage due to system fault. The performance of a relay is greatly determined by its sensitivity and response time.
Jiang, F., Bo, Z. Q., Chen, Zhe
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The discrete fractional Fourier transform based on the DFT matrix

Signal Processing, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Durak-Ata, Lütfiye, SERBES, Ahmet
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Power Converter Line Synchronization Using a Discrete Fourier Transform (DFT) Based on a Variable Sample Rate

IEEE Transactions on Power Electronics, 2005
Line synchronization of grid connected power converters is a well recognized problem when the grid is weak, or derives from a remote area power supply with poor frequency regulation. Such systems can suffer significant line voltage distortion due to notches caused by power device switching and/or low frequency harmonic content, which can easily corrupt
B.P. McGrath, D.G. Holmes, J.J.H. Galloway Galloway   +2 more
openaire   +2 more sources

Realization of a discrete Fourier transform (DFT) module for incorporation in FFT processors

Proceedings of the IEEE, 1977
For applications requiring high-speed and in-place treatment, it is often advantageous to realize special-purpose computers. This paper describes a discrete Fourier transform (DFT) module for incorpration in fast Fourier transform (FFT) processors. The module is highly suitable for real input applications requiring high-speed transformations.
A. Pomerleau, M. Fournier, H.L. Buijs
openaire   +2 more sources