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quadrature amplitude modulation

   Also found in: Acronyms, Wikipedia 0.04 sec.

quadrature amplitude modulation

See QAM.

quadrature amplitude modulation [¦kwäd·rə·chər ‚am·plə‚tüd ‚mäj·ə′lā·shən]
(communications)
Abbreviated QAM.
Quadrature modulation in which the two carrier components are amplitude-modulated.
A digital modulation technique in which digital information is encoded in bit sequences of specified length and these bit sequences are represented by discrete amplitude levels of an analog carrier, by a phase shift of the analog carrier from the phase that represented the previous bit sequence by a multiple of 90°, or by both.
Quadrature Amplitude Modulation - (QAM) A method for encoding digital data in an analog signal in which each combination of phase and amplitude represents one of sixteen four bit patterns. This is required for fax transmission at 9600 bits per second.


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WiMAX systems use a 64 quadrature amplitude modulation (QAM) orthogonal frequency-division multiplexing (OFDM) signal.
Freescale Broadens RF Power Transistor Options for WiMAX Base ... by Business Wire
Quadrature Amplitude Modulation (QAM): This method is used for varying the amplitude of cable broadcast signals.
Samsung Electronics Develops High Performance Digital TV Receiver Chip by Business Wire
a leading provider of next generation Ethernet in the First Mile (EFM) broadband access solutions, today announced the ExpressSTREAM Very high speed Digital Subscriber Loop (VDSL) XH-1200 Quadrature Amplitude Modulation (QAM) based concentrator supporting ExpressSTREAM hospitality, multi-tenant and LEC pop sites.
Nayna Networks Announces New ExpressSTREAM VDSL Concentrator by Business Wire
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