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overview
 Orthogonal frequency-division multiplexing
Orthogonal Frequency-Division Multiplexing (OFDM) essentially identical to Coded OFDM (COFDM) is a digital multi-carrier modulation scheme, which uses a large number of closely-spaced orthogonal sub-carriers.
Each sub-carrier is modulated with a conventional modulation scheme (such as quadrature amplitude modulation) at a low symbol rate, maintaining data rates similar to conventional single-carrier modulation schemes in the same...
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http://en.wikipedia.org/wiki/OFDM
03/16/2007
Tags: ofdm
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