I don't have much circuit expertise, but in theory I believe demodulating SSB can be done by mixing (multiplying) a sine wave 2x the SSB center frequency, and s

I don't have much circuit expertise, but in theory I believe demodulating SSB can be done by mixing (multiplying) a sine wave 2x the SSB center frequency, and summing that with the original signal (and then filtering the large frequency residues of course). This brings the opposite bands next to each other (then you can demodulate as DSB normally).