Multiplexing

History of frequency-division multiplexing

History of frequency-division multiplexing
  1. When was OFDM introduced?
  2. When was multiplexing invented?
  3. What is the concept of frequency division multiplexing?

When was OFDM introduced?

OFDM is a frequency-division multiplexing (FDM) scheme that was introduced by Robert W. Chang of Bell Labs in 1966. In OFDM, multiple closely spaced orthogonal subcarrier signals with overlapping spectra are transmitted to carry data in parallel. Demodulation is based on fast Fourier transform algorithms.

When was multiplexing invented?

Multiplexing originated in telegraphy in the 1870s, and is now widely applied in communications. In telephony, George Owen Squier is credited with the development of telephone carrier multiplexing in 1910.

What is the concept of frequency division multiplexing?

What is frequency-division multiplexing (FDM)? In frequency-division multiplexing (FDM), multiple signals are combined for transmission on a single communications line or channel, with each signal assigned to a different frequency (subchannel) within the main channel.

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