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Discrete Transforms
Rating: 4.6 out of 5(10 ratings)
300 students
Created byRoss McGowan
Last updated 6/2021
English

What you'll learn

  • Discrete Time Fourier Transform
  • Discrete Frequency Fourier Transform
  • Discrete Fourier Transform
  • FFT Algorithm in Excel
  • Mathematical Rigour
  • Graphical Intuition

Course content

1 section16 lectures5h 28m total length
  • Introduction4:36

    Introduction from me, Ross !

  • Course Slides5:55

    Course slides.

  • Transform Relations31:41

    An intuitive introduction.

  • Impulse Train33:35

    The Fourier Transform of an impulse train is another impulse train. This is not intuitively obvious. What we see in this video is an intuitive proof of something called the Poisson Summation Formulae.

  • Continuous to Discrete Conversion Factor12:53

    Conversion from continuous to discrete time / frequency.

  • Convolution (Continuous and Discrete)21:39

    Continuous and Discrete Convolution.

  • Sampling Theorem and Aliasing24:41
  • Discrete Time Fourier Transform23:02
  • Discrete Frequency Fourier Transform12:15
  • Discrete Time and Frequency Fourier Transform (DFT)23:40
  • DFT Example23:47

    A full worked example of the Discrete Fourier Transform.

  • Fast Fourier Transform (Radix 2 Decimation in Time)49:15

    Derivation of radix 2 decimation in time fast Fourier transform.

  • FFT Algorithm in Excel18:40

    Radix 2 FFT Algorithm in Excel VBA

  • Discrete Time Laplace Transform27:01

    Discrete Time Laplace Transform

  • Z Transform Derivation15:40

    The Z transform

  • Goodbye0:39

    Well done in  completing the course. Good luck and goodbye !!!

Requirements

  • Basic Calculus

Description

This course takes a detailed mathematical and also an intuitive graphical approach to learning and understanding the discrete transforms.

We start off with a recap of the continuous Fourier Transform and from this we derive the Discrete Time Fourier Transform (DTFT) then the Discrete Frequency Fourier Transform (DFFT) or as it is commonly known The Fourier Series. We then move onto deriving the Discrete Time and Frequency Transform which is commonly known as The Discrete Fourier Transform (DFT). Finally we look at the mathematics and implementation of an FFT algorithm.

You will not find another course where the mathematics of Discrete Transforms is described in as much detail but still keep a very high level of intuition. This has been achieved by the use of many 2D and 3D diagrams which are quite unique to this course. This course along with my course on Fourier and Laplace Transforms offers a unique insight to the world of mathematical transforms.

If you want a deep mathematical as well as an intuitive grasp of Discrete Transforms then this is the course for you. This is a continuation of the course Fourier and Laplace Transforms. You do not need to have taken the Fourier / Laplace course in order to do this but if may help.


Who this course is for:

  • Everyone who wants to know more about the DFT