Revision as of 04:12, 15 October 2014 by Mille507 (Talk | contribs)



Please post your reviews, comments, and questions below.



  • Review by Yerkebulan Y.

In introduction, you forgot to mention that decimator also includes low-pass filter, also you did not clearly explain why low-pass filter is needed. Good explanation of derivation formula and clear graphs.


  • Review by Hyungsuk Kim

You forgot to put low-pass filter before the decimator. Except that everything is very clear and graphs and example of downsampling is easy to undertand. Great work!


  • Review by Yijun Han

The derivation and the examples of downsampling look nice, but you need to explain why decimator needs a lowpass filter before the downsampling. Also, you need to add a title for your page.


  • Review by Xian Zhang

The whole slecture looks very clear and clean. But you might need to make each part more clear and separated. Also you can add a overview in the beginning to make reader easier to have a big idea of your slecture. And you need a title and a return link in the bottom oof the comment page.


  • Review by Chloe Kauffman

It would be nice if you added an example with a reason as to why you would want to downsample. I.e. not enough memory capacity for current sampled rate. Also, you didn't seem to explain much as to why a decimator needs a LPF prior to downsampling. Where you started explaining a limitation for the value of D to prevent aliasing, you could have added the LPF need background.
I also think you could have been more clear as to how each DT signal was derived. For example, you started in the picture with x[n] then D then x2[n], but then throughout the rest of the slecture you refer to an x1[n], so maybe making it clear that x1[n] is formed from a bandlimited CT signal x(t) that was sampled with period T1.
The graphs are done well and help draw together what you are doing, adding the LPF graph would be a great addition.


  • Review by Michel Olvera

Your Slecture covers most of the topic and the graphs give a better understanding of the material. A good improvement would be adding the explanation of the low pass filter needed before the downsampling process. Good job!


  • Review by Fabian Faes

I thought that this slecture covered most of the topic discussed and that the graphs used were well made and explained downsampling well. I think that block diagrams would have also been a valuable addition to aid the understanding of the process. Like others have mentioned I do agree that an explanation of the low pass filter are desirable.


  • Review by Ryan Johnson

I liked the step by step graphical illustrations of down sampling. This was very helpful to me because I am a visual learner. Good job overall!


  • Review by Evan Stockrahm

Organizationally, I could use a title for the page letting me know what you are about to teach me. Also try and keep spacing between lines similar for a professional look. The plots in the example are extremely helpful to see how it all works.


  • Review by Matt Miller

The inclusion of diagrams made this slecture very easy to follow, however the formatting could be improved.


Alumni Liaison

Correspondence Chess Grandmaster and Purdue Alumni

Prof. Dan Fleetwood