hw8 - ECE220 Signals and Information Spring 2008 Homework...

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Unformatted text preview: ECE220 Signals and Information Spring 2008 Homework 8: Due Monday, April 21st, at 10:08pm Drop your homework in the collection box marked ECE220 Spring 2008, homework , located on the second floor of Phillips at the south entrance to 219 Phillips. Print your name, NetId, and lab section in the top right corner on all pages. NOTE: This homework is based on lectures 20-66 and Chapter 12 in the textbook. Problem 1 A periodic signal x ( t ) with a period T s = 10- 3 seconds is input to a bandpass filter with the frequency reponse H ( j ) = 1 for 3000 < | | < 5000 . (a) The Fourier series for x ( t ) has coefficients a k = braceleftbigg 10 k = 0 2 j k k negationslash = 0 Find the output y ( t ). (b) Now assume that x ( t ) is bandlimited with X ( j ) = 0 for | | > 3000 . Suppose that x ( t ) is modulated by cos(4500 t ) and next bandpass filtered with H ( j ). Make a plot of the Fourier transform of Y ( j )....
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This note was uploaded on 06/25/2008 for the course ECE 2200 taught by Professor Johnson during the Spring '05 term at Cornell University (Engineering School).

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hw8 - ECE220 Signals and Information Spring 2008 Homework...

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