I have electronic and radio books that are 70 years old and nothing inside of any of them ever came close to the confabulations this person proposes.
You have a carrier - which does nothing except carry the intelligence and you have a upper and a lower side band - which is the intelligence that rides upon the carrier. And that is it for AM!
In single side band you suppress one side band which forces the energy up into the other side band.
When Regency came out with Double Suppressed Side Band, they suppressed both the carrier and one side band.. The model I had was the Range Gain II or the Imperial. Either model required another radio that could do the same thing in order for it to work - else you ended up talking to yourself.
When the Japanese came into the market with the cheap CB radios, all that technology was forgotten and the companies that made it were soon forced to do other things or get out of the business because the days of quality American Made CB radios came to an end when Cobra came out with a $39.00 AM CB that did the same thing as the more expensive units - just didn't have SSB or DSSB...
Television used a mode called Vestigial side band where part of the one side band was suppressed and the remaining energy was diverted up into the remaining side band.
If there was a way to double the power, don't you think that someone would have came up with it long before now?
AM for the most part is dead as far as commercial broadcast goes and the only people who participates in it on Amateur Radio are the ones with the old boat anchors who wants to keep their tubes warm, who thinks that they are doing something when they broadcast with their old equipment.
It usually ends up being a bunch of old lids who talks just to hear themselves talk, with nothing of no importance to say and just looking for an audience...