Questions and Comments for
Discrete-time Fourier transform (DTFT) of a sampled cosinePlease post your reviews, comments, and questions below.
- Review by Miguel Castellanos
Both of your computations are clear, and using the periodicity of cosine in the second computation helps illustrate why aliasing occurs with the second sampling period. In your conclusion, be sure to mention what axis you are rescaling. Nice job!
- Review by Fabian Faes
I enjoyed the flow of this slecture and how the graphs fitted well with the mathematics described. However in the case of the frequency below the Nyquist rate I think it would have been beneficial to state that frequency shifting occurs due to not fitting withing 0 and pi. I did see that it was stated in the conclusion which I think is good but I still think it should be mentioned at the time of use. Overall a great job!
- Review by Hyungsuk Kim
- Both sampling above the Nyquist rate and below the Nyquist rate are well explained and organized. And graphs are very helpful to understand the difference between sampling above and below the Nyquist rate.
- Both sampling above the Nyquist rate and below the Nyquist rate are well explained and organized. And graphs are very helpful to understand the difference between sampling above and below the Nyquist rate.
- Review by student 4
- Author answer here
