Amplitude Modulation

Amplitude modulation (AM) is widely used for transmitting information or signals. AM shifts the spectrum of the signal by the carrier frequency. This enables relatively low-frequency signals to be shifted to frequency bands that propagate better and allows multiple signals of similar frequency content to be transmitted simultaneously.

[theIpatix]

Excellent explanation! Actually, it's quite a pity that I now start watching all these videos now that I'm done with my signal and systems class, but it's cool to recognize all the stuff and actually understanding it.

[PTNLemay]

2:23
What exactly do negative frequencies mean here? I remember reading that it has something to do with phase and complex numbers.

[jpgdotexe]

Great video, a little confused on one part though. In your equations, when splitting the cosines into the exponentials, why is it that the green equations have the Ak turn into ak and it’s conjugate, but when you do the same to the blue equations, there is no coefficient/conjugate?

[RD]

Nice vid but I thought you slipped a 2 in your equation for V(t) because Re (z) = (z + z conjugate)/2. Thought about it some more and realized you hid that fact in the ak and ak conjugate terms. Tricky, bit hard to follow, but legit. OK chief, got it!

[locoparentis]

why would you put ads in the middle of an education video for heavens sake