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Questions and Comments for

Fourier Transform of Rep and Comb Functions

A slecture by ECE student Matt Miller



Please post your reviews, comments, and questions below.



  • Review by Miguel Castellanos

I like how you state the differences between the two operators in your introduction, but then conclude by stating how the two operators are related through the Fourier transform. Your derivations are also concise. I think it would be helpful to some if you explain some of the less intuitive steps, such as when you use the Fourier series representation of an impulse train. Well done, overall.

    • Author answer here

  • Review by Soonho Kwon

Going over the equations and the mathematics, it was very clear to understand. However, to explain how the functions look like, it would be better to put some graphs on. Great job!

    • Author answer here

  • Review by Michel Olvera
    • The content of your Slecture is easy to follow. It really helped me review this topic. What I liked most was the step by step explanations and as Miguel said, few steps can be added at the end of the content to explain the Fourier Transform of the rep operator, that would be a nice improvement. Good job!

  • Review by Sahil Sanghani

Overall this is a great Slecture! I like how the derivations are concise and clear. Also, the explanations along the way draw attention to important points. I think the one spot where you could explain a little more is in the Fourier Transform of the comb. In the second line, the substitution of $ p_{T}(t) $ with $ \sum_{n=-\infty}^{\infty}\frac{1}{T}e^{j{\frac{2 \pi}{T}}nt} $
could be better explained. Great job!


  • Review by Botao Chen

Well done. Everything is put in very good order. The demonstrations for both comb and rep are specific and easy to follow. Maybe you could try to provide some graphs to show your point. Sometimes I feel very useful to just look at the graphs and suddenly get the idea about how everything is going on.


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Basic linear algebra uncovers and clarifies very important geometry and algebra.

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