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Orthogonal frequency-division multiple access
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<p>Orthogonal frequency-division multiple access (OFDMA) is a multi-user version of the popular <a href="/facts/Orthogonal_frequency-division_multiplexing/YhPkx5ql">orthogonal frequency-division multiplexing</a> (OFDM) <a href="/facts/Modulation/aAXPjINv">digital modulation</a> scheme. <a href="/facts/Multiple_access/CdCGxpcu">Multiple access</a> is achieved in OFDMA by assigning subsets of <a href="/facts/Carrier_wave/ae98pBlY">subcarriers</a> to individual users. This allows simultaneous low-data-rate transmission from several users. </p>