Lec 2 MIT 6.451 Principles of Digital Communication II
PROFESSOR: There is one handout being passed out, it's chapters four and five, so be sure to pick it up. And just a reminder that there is a homework due on next Wednesday, so we have homeworks due every week in this course as well. So last class, we covered Chapters One through Three quite quickly rather, because it was mostly a review of 6.450, and one of the key ideas we covered last class was the connection between continuous time and discrete time systems. So we have continuous time, discrete time. A specific example that we saw was that of an orthonormal PAM system. The architecture for a PAM system is as follows: you have Xk, a sequence of symbols coming in, they get into a PAM modulator. What you get out is a wave form, X of t, is what the PAM modulator produces. You have a little noise on the channel, and what you receive out is Y of t. So Y of t is the wave form that the receiver receives, and what a canonical receiver's structure to a matched filter fol...