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ECE 401 Communication Systems - University of Dayton : Homepages

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Focus on EM Signals<br />

• Nearly all long distance modern communications<br />

uses electro-magnetic (EM) signals<br />

• EM signals may be in guided wireline channels<br />

(twisted pair, coaxial, or optic fiber) or wireless<br />

channels (free space)<br />

• Relatively easy to generate, detect, manipulate,<br />

amplifiy, etc.<br />

• Travel at or near the speed <strong>of</strong> light<br />

• Notable exception is underwater acoustic channels<br />

<strong>University</strong> <strong>of</strong> <strong>Dayton</strong> Department<br />

<strong>of</strong> Electrical and Computer<br />

Engineering

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