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Revision as of 09:08, 8 October 2010
Homework 6, ECE438, Fall 2010, Prof. Boutin
Due in class, Friday October 15, 2010.
The discussion page for this homework is here. Feel free to share your answers/thoughts/questions on that page.
Question 1
Consider the signal
x[n] = sin(ω1n) + ksin(ω2n),
where k is a real valued constant.
a) Write a program that will
- Plot x[n].
- Compute the N point DFT X[k]. (Yes, you may use FFT routines.)
- Plot the magnitude of X[k].
Turn in a print out of your code.
b) Run your program and generate outputs for the cases shown below.
| Case | N | $ \omega_1 $ | k | $ \omega_2 $ |
|---|---|---|---|---|
| 1 | 20 | |||
| 2 | 200 | |||
| 3 | 20 | |||
| 4 | 200 | |||
| 5 | 200 | |||
| 6 | 200 |
