HW5 - ECE 301 Homework 5 Landis Human Purdue University...

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ECE 301: Homework 5 Landis Huffman Purdue University, Summer 2009 Due July 23, 2009 in class 1. Chapter 5 Problems 5.8, 5.21(b,g), 5.24, 5.34 2. Chapter 7 Problems 7.3, 7.22, 7.29 3. Rhea Contribution Using your cheat sheet from Exam 1, add some content to the communal cheat sheet page on the Rhea. Try as a class to create every page linked to on the Midterm Cheet Sheet page (i.e. make the red links purple!) 4. Aliasing in Matlab (a) Obtain Landis’ code for HW1’s Mario theme (link on the Rhea). The function is written so that the command x = Mario(T); will produce a vector, x, corresponding to a samples of the Mario theme taken every T seconds. Do the following for T = 0.0005, T = 0.001, T = 0.0013, and T = 0.002. i. Create the vector x sampled with the given T. Play the pro- duced audio using sound(x,1/T); How does the audio sound? Listen for audio effects of aliasing. ii. Plot the magnitude | X ( ω ) | of the Fourier transform of x in the range ω [ - π, π ). Make sure to label the ω -axis; submit printouts of your plots with your written homework.
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