Module 3: Quadrature Modulation and Single Side Band (SSB)

[kindjupiter]

one of the best explanation i have seen in modulation.Thank you

[NGBigfield]

Such a good and informative set of videos. I love it!

[simonlariviere]

I think the last step missing is adding up the last signal X_AM(f) (with negative outer band) with the original one (all positive). The plus and minus in the outer band will cancel out and we will be left with only the inner band. So all of this is a way to get a single side band (here the inner band) without the use of a high-pass filter which would be non ideal.

Also, at 13:32 there is a small mistake. Professor says (-j)*(-j) gives +1, but in fact (-j)*(-j) = +j^2 = +(-1) = -1, and the drawn arrow should point to the negative outer band on the right side. The positive bands are actually the result of j*(-j) and (-j)*j.

Other than that, very well presented video. Thank you!

[hankhsu]

Hi everybody, I found the remaining video can be found at the link provided in the slides. The lectures is more orginized and more complete there!

[danthomas]

Thank you for this video and I found it very informative. However it seems to end abruptly; can you please check it? You seem to be leading up to a conclusion that seems to be missing. Thank you in advance!

[odissey]

So it was all for nothing! - where is the end?

[appoloniarozia]

Can you plz tell me. Please help me
1?what effect if frequency change the carrier output Quadrature amplotude modulation
2) what effect if frequency and phase both chage carrier output Quadrature amplotude modulation ??