Amplitude modulation: Difference between revisions
From Glossary of Meteorology
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<div class="definition"><div class="short_definition">Changing the [[amplitude]] of a [[carrier wave]] by some means so that the resultant waveform transmits a [[signal]] conveying information.</div><br/> <div class="paragraph">For example, if the carrier wave with [[angular frequency]] ω is cos(ω''t''), the corresponding amplitude-modulated signal is <div class="display-formula"><blockquote>[[File:ams2001glos-Ae19.gif|link=|center|ams2001glos-Ae19]]</blockquote></div> where ''g''(''t'') is a function that varies more slowly with time than does the carrier wave. <br/>''Compare'' [[frequency modulation]].</div><br/> </div> | <div class="definition"><div class="short_definition">Changing the [[amplitude]] of a [[carrier wave|carrier wave]] by some means so that the resultant waveform transmits a [[signal]] conveying information.</div><br/> <div class="paragraph">For example, if the carrier wave with [[angular frequency]] ω is cos(ω''t''), the corresponding amplitude-modulated signal is <div class="display-formula"><blockquote>[[File:ams2001glos-Ae19.gif|link=|center|ams2001glos-Ae19]]</blockquote></div> where ''g''(''t'') is a function that varies more slowly with time than does the carrier wave. <br/>''Compare'' [[frequency modulation]].</div><br/> </div> | ||
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Revision as of 15:23, 25 April 2012
amplitude modulation[edit | edit source]
Changing the amplitude of a carrier wave by some means so that the resultant waveform transmits a signal conveying information.
For example, if the carrier wave with angular frequency ω is cos(ωt), the corresponding amplitude-modulated signal is where g(t) is a function that varies more slowly with time than does the carrier wave.
Compare frequency modulation.
Compare frequency modulation.
Changing the amplitude of a carrier wave by some means so that the resultant waveform transmits a signal conveying information.
For example, if the carrier wave with angular frequency ω is cos(ωt), the corresponding amplitude-modulated signal is
Compare frequency modulation.
For example, if the carrier wave with angular frequency ω is cos(ωt), the corresponding amplitude-modulated signal is
where g(t) is a function that varies more slowly with time than does the carrier wave.
Compare frequency modulation.
