Re: Up conversion
He says you must have some carrier cycles within one bit duration, otherwise you don't have a carrier. This confuses me because the problem is very basic and I'm sure I'm right.. I think his view is that when using the stream [1 -1 1 -1 1 -1 ...] we'll have half a cycle per bit duration, which means the spectrum starts sharply from zero till 2B where B is the baseband BW.
btw, why 2*0.5 MHz, this should be the sampling freq I think, but to avoid spectral overlapping, the minimum carrier = Baseband BW, right ?