[Elecraft] here is how to "get a feel" for a roofing

[Ken N9VV]

F.Y.I.

I know of at least two experimental ANTENNA --> DSP designs that are 
out there being tested:

HPSDR "Mercury" design
http://hpsdr.org/mercury.html

and Phil Covington N8VB's QuickSilver QS1R/QS1T design
http://pcovington.blogspot.com/2006/12/qucksilver-qs1r-software-defined.html

de ken n9vv

> Is there no way to put dsp at/as the first filter?
> 
>> Yes, more or less. This is High Performance Software
> Defined Radio solution where you connect the ADC to
> the antenna, then a DSP is handling all the
> demodulation of signals, manage the filters and
> notches, once this works (software) is completed the
> voices or dit dah willa come out from an audio
> amplifier and on to the loudspeaker(s).