OFDM for wired?

["frank.agee@xxxxxxxxx" <frank.agee@xxxxxxxxx>]

OFDM is used for WiFi, HomePlug, and HD radio.

How much data rate increase do you get by using the multiple
carriers,
as opposed to just one carrier?


For example, HomePlug 1.0 goes upto 20Mhz in carriers.  How much
benefit do you get by using its 84 carriers, as opposed to just using
one 20Mhz carrier at the highest data rate you can make work?


WiFi is 2.4Ghz.  Same type of question?


Should wired digital audio and video networks also use OFDM?


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