[Elecraft] K3/K3S noise blanker performance greatly enhanced (at my QTH) -- need testers

[David Woolley]

Noise reduction is a difficult problem and hearing aid manufacturers 
have been trying to solve it for the last couple of decades.

One important point to note is that noise reduction is normally aimed at 
reducing subjective noise and therefore reducing fatigue.  Generally 
what you are doing is actually recognising signal, then suppressing 
those frequencies that are not conveying the signal.  The noise on the 
same frequencies as important parts of the signal still gets through.

You cannot remove noise unless you have first identified the signal, so 
you cannot remove the noise that is masking an unknown signal.

The simplest noise reduction is a narrow band CW filter!  The ultimate 
noise reduction for CW would be to decode the signal, and regenerate it, 
but that is currently only possible for signals that are already clean 
an well formed.

Decode and  recreate might be the ultimate solution for hearing aids, as 
well.

-- 
David Woolley
Owner K2 06123

On 06/02/16 03:35, drewko wrote:
> I'm glad that noise solutions are being investigated. I think advances
> in NR/NB would be of more importance to many hams than close-in dynamic
> range, however useful the improvement in those attention-getting figures
> are. On a day to day basis noise is the top culprit for many of us.