Picture of virus under microscope

Research under the microscope...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

Explore SIPBS research

Fast-responding measurements of power system harmonics using discrete and fast fourier transforms with low spectral leakage

Roscoe, Andrew J. and Carter, R. and Cruden, A. and Burt, Graeme M. (2011) Fast-responding measurements of power system harmonics using discrete and fast fourier transforms with low spectral leakage. In: Renewable power generation (RPG 2011). IEEE, New York, pp. 1-6.

[img]
Preview
PDF
C_2011_Roscoe_IET_RPG_DFT_vs_FFTpdf_PostPrint.pdf - Accepted Author Manuscript

Download (959kB) | Preview

Abstract

Conventional wisdom dictates that a Fast Fourier Transform (FFT) will be a more computationally effective method for measuring multiple harmonics than a Discrete Fourier Transform (DFT) approach. However, in this paper it is shown that carefully coded discrete transforms which distribute their computational load over many frames can be made to produce results in shorter execution times than the FFT approach, even for large number of harmonic measurement frequencies. This is because the execution time of the presented DFT actually rises with N and not the classical N2 value, while the execution time of the FFT rises with Nlog2N.