Orthogonal frequency division multiplexing (OFDM) is a communications technique that divides a communications channel into a number of equally spaced frequency bands.
A subcarrier carrying a portion of the user information is transmitted in each band.
Each subcarrier is orthogonal (independent of each other) with every other subcarrier, differentiating OFDM from the commonly used frequency division multiplexing (FDM).
preview:
http://www.iec.org/online/tutorials/ofdm/
2/26/2004
