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| − | == the concept of modulation ==[[Image:a_ECE301Fall2008mboutin.jpg]]Why?•More efficient to transmit E&M signals at higher frequencies•Transmitting multiple signals through the same medium using different carriers•Transmitting through “channels” with limited passbands•Others...How?•Manymethods•Focus here for the most part on Amplitude Modulation (AM)[[Image:B_ECE301Fall2008mboutin.jpg]]== Amplitude Modulatioin of a Complex Exponential Carrier | + | == the concept of modulation == |
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| + | [[Image:a_ECE301Fall2008mboutin.jpg]]Why?•More efficient to transmit E&M signals at higher frequencies•Transmitting multiple signals through the same medium using different carriers•Transmitting through “channels” with limited passbands•Others...How?•Manymethods•Focus here for the most part on Amplitude Modulation (AM)[[Image:B_ECE301Fall2008mboutin.jpg]] | ||
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| + | == Amplitude Modulatioin of a Complex Exponential Carrier == | ||
Revision as of 19:21, 17 November 2008
the concept of modulation
Why?•More efficient to transmit E&M signals at higher frequencies•Transmitting multiple signals through the same medium using different carriers•Transmitting through “channels” with limited passbands•Others...How?•Manymethods•Focus here for the most part on Amplitude Modulation (AM)
