29-07-2022, 12:14 PM
That's sort of what a digital radio transmitter is. Except that mostly they use fast DACs.
Frank Cuffe did some experiments along these lines to generate the RF output directly from a FPGA. I've also done some very simple experiments. I got as far as a 1kHz tone on a 15MHz carrier. It proved that the ideas worked. I also sketched, but never implemented, a vestigial sideband digital modulator. This used the so-called "3rd method" of SSB generation, also known as the Weaver method after his paper from 1956. This method, designed to avoid difficult filter or phase shifter problems that afflict other SSB methods, is rather complex in analogue but pretty simple in digits.
Frank Cuffe did some experiments along these lines to generate the RF output directly from a FPGA. I've also done some very simple experiments. I got as far as a 1kHz tone on a 15MHz carrier. It proved that the ideas worked. I also sketched, but never implemented, a vestigial sideband digital modulator. This used the so-called "3rd method" of SSB generation, also known as the Weaver method after his paper from 1956. This method, designed to avoid difficult filter or phase shifter problems that afflict other SSB methods, is rather complex in analogue but pretty simple in digits.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
