Is OFDMA multiplexing technique?

Unsourced material may be challenged and removed. 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.

1 Comparison of FDMA and OFDM signals; (a) five FDMA channels with guard band and (b) 5 OFDM orthogonal channels. Orthogonal frequency division multiplexing (OFDM) is a communication technique that can be seen as either a modulation scheme or a multiplexing technique .

Orthogonal frequency-division multiplexing is a method of data transmission where a single information stream is split among several closely spaced narrowband subchannel frequencies instead of a single Wideband channel frequency .

Conceptually, OFDM is a specialized frequency-division multiplexing (FDM) method , with the additional constraint that all subcarrier signals within a communication channel are orthogonal to one another.