Higher-order modulation is a type of
digital modulation usually with an order of 4 or higher. Examples:
quadrature phase-shift keying (QPSK), and m-ary
quadrature amplitude modulation
Quadrature amplitude modulation (QAM) is the name of a family of digital modulation methods and a related family of analog modulation methods widely used in modern telecommunications to transmit information. It conveys two analog message signa ...
(
m-QAM).
See also
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phase-shift keying
Phase-shift keying (PSK) is a digital modulation process which conveys data by changing (modulating) the phase of a constant frequency carrier wave. The modulation is accomplished by varying the sine and cosine inputs at a precise time. I ...
*
modulation order
Quantized radio modulation modes
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