It uses SDR techniques and a combination of AM and FM to achieve polar modulation and generate SSB. He’s provided a fascinating in-depth technical explanation to help understand how it works.

“Because Tarsio’s SSB generator of necessity used an analog 90-degree phase difference network with non-linear group delay, there may have been additional modulation overshoot artifacts.” Orban ...

The frequency response above implies attenuation of “negative” frequency components while passing “positive” frequency components. In an SSB situation, this relates to the lower and upper sideband ...

This seems to be a ‘laws of physics’ issue — the SSB waveform cannot exploit the interleaving property of the DSB waveform and thus requires more peak limiting,” Orban wrote. Frank Foti maintains that ...

AM, or amplitude modulation, was the earliest way of sending voice over radio waves. That makes sense because it is easy to modulate a signal and easy to demodulate it, as well. A carbon microphone… ...