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Definition of "quadrature amplitude modulation (QAM)" |
a modulation technique in which the incoming symbols are split into two substreams,which are modulated in quadrature. In the conventional implementation, the “in-phase” symbols are modulated by cos2πfct and the “quadrature” symbols are modulated by sin2πfct , so that the transmitted phases associated with the two substreams differ by π/2 |
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