- Its abbreviation is FDM. A technique in which multiple signals are transmitted simultaneously over a single transmission path by assigning each signal a separate portion of the total available frequency spectrum. For instance, a transmitter of a cable TV signal may utilize FDM to transmit many channels over the same coaxial cable. Also called frequency multiplexing.
- noun a system used to assign a number of different signals to different frequencies to allow many signals to be sent along one channel