[LAD] Smallest, simplest, silliest SDR?

fons at kokkinizita.net fons at kokkinizita.net
Sun Feb 28 00:50:54 UTC 2010

On Sun, Feb 28, 2010 at 12:50:07AM +0000, Gordon JC Pearce wrote:

> On Sun, 2010-02-28 at 01:41 +0100, fons at kokkinizita.net wrote:
> > On Sun, Feb 28, 2010 at 12:40:00AM +0000, Gordon JC Pearce wrote:
> > 
> > > I wanted a very simple SDR with jack inputs and outputs for a
> > > demonstration I was doing.  I had a look at the DSP guts of dttsp and
> > > quisk, and sat down to code.
> > 
> > Forgive my ignorance, but what is an SDR ?
> Software-Defined Radio.  Basically you downmix incoming RF to the audio
> range with two mixers fed 90 degrees out of phase.  You can then munge
> this in various different ways to tune and demodulate various different
> radio signals.

So if I understand this well the input (which has to 
be in the audio range) is a complex signal already
near to zero Hz carrier and the plugin shifts it to
exactly zero ? 
Does it do SSB as well ?



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