Posted by Brian Gregory [UK] on 09/24/07 18:21

I'm not an really an expert either.

Actually, come to think of it, thinking of QAM as a combination of AM and
PSK isn't at all helpful.

I think QAM should be thought of as two carriers in quadrature with each
other each being AM modulated, that is multiplied by numbers (which can be
both positive and negative). The overall phase of the generated QAM signal
(sum of the two carriers) does shift about as does the overall amplitude but
treating them separately will not help you demodulate the QAM.

I don't think I have much more to say on this subject.

--

Brian Gregory. (In the UK)
ng@bgdsv.co.uk
To email me remove the letter vee.

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