Hi,
After seeing how cool the idea of building a transceiver (the QDX) for digital modes is, because they do not require a linear final RF output stage is. And getting five watts out with just plastic signal transistors.?
The question is, are there any potential modulation schemes that might only require a nonlinear RF final and provide acceptable or even very good performance, on HF bands, as a new mode for ham radio digital voice. Doesn't need to be as bandwidth conserving or as good S/N wise as OFDM, but something that could make low cost voice transceivers, with energy efficient RF final stages possible.?
Tom, wb6b
