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Questions and Comments for

Discrete Time Fourier Transform with Example

A slecture by ECE student Jacob Holtman



Please post your reviews, comments, and questions below.



  • Review by Miguel Castellanos

You are clear about your thought process in both proving the periodicity property and computing a DTFT. This can be helpful because those general concepts can be applied to other similar problems. I also like your use of color to indicate the what term in the expression your are talking about. In your second computation, remeber that the DTFT is a continous function and therefore you must use the continous delta function, which is infinity (not 1) at a single point. Good job overall!


  • Review by Fabian Faes

I enjoy the flow of this Slecture and the use of color to highlight the use of certain variables in equations. I also enjoy that the Slecture is short and sweet which makes it easy read and process. If there was one caveat I comment on it would be that in the last line that the DTFT of the complex exponential is repeated every 2*pi. Other than that is a great lecture, good job!


  • Review by Michel Olvera

What I liked most about your Slecture was the use of color to emphasize the replacements in equations, since it is really helpful to clearly see and understand what you are talking about. Great job!


  • Review by David Klouda

Great use of color for the equations. It made the page feel as if someone were showing it to me in person rather than a computer screen, almost like a tutor. My only recommendation would be to organize your sections a little more to create a good flow through the document as well as outline the main points of each section.


  • Review by Soonho Kwon

Making this slecture with a few different colors to emphasize the exponential and the delta values. The overall slecture felt a little bit short in lengthwise, however, this slecture clearly explained the topic. Nicely done!

Author answer here


  • Review by Botao Chen

I really appreciate the use of different color to show the importance and point to notice in your demonstration. Because it is just something I could potentially miss. Thanks for pointing that out to me. And if you could provide some graphs it will be better for others to understand your examples.

Author answer here


Back to ECE438, Fall 2014

Alumni Liaison

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

Dr. Paul Garrett