Questions and Comments for DTFT of a Cosine Signal Sampled Above and Below the Nyquist Frequency
Please post your reviews, comments, and questions below.
- Review by Jacob Holtman
The work is very concise and easy to follow. In the introduction it might help to put a mathematical explanation of Nyquist, which is mentioned in the second section. Also color would help to distinguish the different sections of the plot and how when T is too small the parts seen between − p'iand <span class="texhtml" />pi comes from repetitions and not the initial transform k = 0.
- Review by Fabian Faes
The overall flow of the slecture is very easy to follow and understand. I thought the graphs and the accompanying explanations were very easy to follow and understand without too much difficulty. from my point of view I cannot think of something for improvement since I find the mathematics easy to understand and clearly explained. Great Job!
- Review by Botao Chen
Good job! Your demonstrations are easy to follow and your outlines are very clear. Is is a good reviewing material for me because of your use of graph which strongly support the demonstration. I could clear see what is going on when the Nyquist rule is violated and when it is not.
- Author answer here
- Review by Yerkebulan Y.
You clearly explained that if CT signal is sampled above Nyquist rate , there is no aliasing. And if it is below Nyquist rate there is aliasing, and original signal cannot be properly represented because frequencies do not lie between -pi and pi.
