[hpsdr] Pre-Distortion

[Dan Mills]

Silly question, but would it be worthwhile to modify the sampler to
give both current and voltage sample outputs?
That way folks with a dual adc rx can use it to measure the impedance
seen at the point the sampler is inserted and things like gamma, RL
and SWR can be trivially calculated.

It would even allow for some tricks like say making the PA drain
voltage track the value of |Z| so that the amplifier always operates
at a drain voltage corresponding to full power into the actual load
impedance presented. Making the drain voltage track the modulation
envelope is harder but also offers worthwhile efficiency improvements.


Just a thought.

73 M0HCN.

 1386513593.0