Lecture 16 Blog, ECE438 Fall 2011, Prof. Boutin

Wednesday September 28, 2011 (Week 6) - See Course Outline.

Today we discussed how the DTFT of a signal compares to the DFT of a truncated version of that signal (repeated periodically with period equal to the duration of the signal). In particular, we pointed out the "ripples" created by the truncation of the signal.

Relevant Rhea pages

• The page I used in class to show the plot of the DTFT of a window function

Action items

• Begin working on the fourth homework
• Everybody should add at least one formula/property to our DFT table.
• Keep working on the three new practice problems (and share your answers)
  • Compute this DFT
  • Compute this other DFT
  • What kind of signals are band-limited?

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