alexa Discrete Fourier Transform: Approach To Signal Processing
ISSN ONLINE(2278-8875) PRINT (2320-3765)

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering
Open Access

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Research Article

Discrete Fourier Transform: Approach To Signal Processing

Anant G. Kulkarni1, Dr. M. F. Qureshi2, Dr. Manoj Jha3
  1. Research scholar, Department of Electronics Engineering, Dr. C. V. Raman University, Bilaspur, India
  2. Principal, Professor, Department of Electrical Engineering, Government Polytechnic, Kanker-Narayanpur, Buster, India
  3. Head, Department of Mathematics, Rungta Engineering College, Raipur, India
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Abstract

There are three different way to calculate DFT. First method is using formula of DFT or simultaneous equation. Second is Correlation technique and third one is using Fast Fourier Transform (FFT). First method is useful for understanding of basic idea of DFT, but it is not fit for practical and application purpose. In second method is based on detecting known waveform in another signal. It is used for some specified application. This method is used, when DFT has less than about 32 points. Third method is genius method, where FFT algorithm decomposes a DFT with N points, into N DFTs each with single point It is faster than DFT. These all three methods produce an identical output. Here we focused on FFT. This paper described about of DFT using FFT and its MATLAB implementation. The FFT spectrums for the outputs are analysed.

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