Downsampling Soonho Kwon slecture review - Rhea

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.
  
  • Author answer here

• 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.