Difference between revisions of "QAM"
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'''Quadrature amplitude modulation''' ('''QAM''') is a modulation scheme which conveys data by changing (modulating) the amplitude of two carrier waves. These two waves, usually sinusoids, are out of phase with each other by 90° and are thus called quadrature carriers — hence the name of the scheme. [http://en.wikipedia.org/wiki/QAM] | '''Quadrature amplitude modulation''' ('''QAM''') is a modulation scheme which conveys data by changing (modulating) the amplitude of two carrier waves. These two waves, usually sinusoids, are out of phase with each other by 90° and are thus called quadrature carriers — hence the name of the scheme. [http://en.wikipedia.org/wiki/QAM] | ||
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| + | Oftentimes, the author is writing in the context of [[HDTV]] transmission. The other forms being [[OTA]] and satellite service. | ||
[[Category:Glossary]] | [[Category:Glossary]] | ||
Revision as of 17:09, 20 March 2006
Quadrature amplitude modulation (QAM) is a modulation scheme which conveys data by changing (modulating) the amplitude of two carrier waves. These two waves, usually sinusoids, are out of phase with each other by 90° and are thus called quadrature carriers — hence the name of the scheme. [1]
Oftentimes, the author is writing in the context of HDTV transmission. The other forms being OTA and satellite service.
