ie: http://m.eet.com/media/1072296/RFFig84.jpg I am 99% sure the answer is: no, it can't. I've read that DSB-SC demodulation requires the carrier frequency to be put back into the signal at the receiving end prior to demodulation (or as part of the demod process), and that if its too out of phase with the original carrier waveform you lose the message. I've seen the math for that, and the math makes sense...what I don't understand is why a basic envelope detector won't work for DSB-SC. Is it because of the phase reversal? Wouldn't the phase reversal have predictable effects though on the envelope? Wouldn't it double the frequency if a simple envelope detector was used, and couldn't one also just half the frequency again to correct for this?