Orthogonal frequency-division multiple access

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Multiplexing
Analog modulation
AM FM PM QAM SM SSB
Circuit mode (constant bandwidth)
TDM FDM / WDM SDMA Polarization Spatial OAM
Statistical multiplexing (variable bandwidth)
Packet switching Dynamic TDMA FHSS DSSS OFDMA SC-FDM MC-SS
Related topics
Channel access methods Medium access control
v t e

Orthogonal frequency-division multiple access (OFDMA) is a multi-user version of the popular orthogonal frequency-division multiplexing (OFDM) digital modulation scheme. Multiple access is achieved in OFDMA by assigning subsets of subcarriers to individual users. This allows simultaneous low-data-rate transmission from several users.