HW7_ece220_2007

HW7_ece220_2007 - Homework 7(ECE220 Fall 2007 Due Wednesday...

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Homework 7 (ECE220 - Fall 2007) Due: Wednesday, October 31 by 2PM in the drop box outside 219 Phillips Hall. Reasoning and work must be shown to gain full/partial credit. WRITE YOUR NAME AND NET ID ON ALL PAGES HANDED IN! 1. (40 points) Modulation of signals (Up-conversion, Down-conversion) Property to use: Duality between Fourier Transforms properties and properties in the time domain. Premise: One of the most basic ways of sharing a channel using wireless RF transmission/optical or audio waves is that of modulating the signals with a sinusoidal waveforms: literally this is a jargon term that means using either the amplitude (AM) or the phase (more properly its derivative, from which comes the name FM) to transmit a signal. More generally, the problem of sharing the spectrum among several signals is called the problem of multiplexing signals. Using a modulating sinusoid is a technique called frequency multiplexing. Assume the signal we want to transmit is
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This note was uploaded on 05/31/2008 for the course ECE 2200 taught by Professor Johnson during the Fall '05 term at Cornell.

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HW7_ece220_2007 - Homework 7(ECE220 Fall 2007 Due Wednesday...

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