(pronounced as separate letters) Short for
Orthogonal Frequency Division Multiplexing, an
FDM modulation technique for transmitting large amounts of digital data over a radio wave. OFDM works by splitting the radio signal into multiple smaller sub-signals that are then transmitted simultaneously at different frequencies to the receiver. OFDM reduces the amount of
crosstalk in signal transmissions.
802.11a WLAN, 802.16 and WiMAX technologies use OFDM.
Compare with FHSS and DSSS.