ECE 401 Communication Systems - University of Dayton : Homepages
ECE 401 Communication Systems - University of Dayton : Homepages
ECE 401 Communication Systems - University of Dayton : Homepages
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Need for Radio Frequency (RF)<br />
• To directly transmit most baseband signals, via<br />
EM propagation, the antenna dimensions would be<br />
wildly impractical!<br />
• The modulator allows us to modify (modulate) an<br />
RF signal in proportion to the message.<br />
• The RF carrier is <strong>of</strong> high enough frequency to<br />
allow for practical antenna dimensions for a given<br />
application.<br />
• The message signal can be recovered from the<br />
modulated RF carrier at the receiver using<br />
demodulation.<br />
<strong>University</strong> <strong>of</strong> <strong>Dayton</strong> Department<br />
<strong>of</strong> Electrical and Computer<br />
Engineering
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