Another failure of decoding UAT

Pete Zaitcev zaitcev at kotori.zaitcev.us
Wed Jan 22 15:36:25 UTC 2014


The hardware receives the Extended Squitter at 1090 MHz, so we may
assume that it works. I'm using a little monopole antenna sized for
978 MHz for this, sitting right on the connector.

-- Pete

On Wed, 22 Jan 2014 12:35:35 +0200
Nikos Balkanas <nikos.balkanas at eyeonix.com> wrote:

> Have you checked your hardware? Mostly antenna and grounds...
> 
> BR,
> Nikos
> 
> 
> On Wed, Jan 22, 2014 at 6:54 AM, Pete Zaitcev <zaitcev at kotori.zaitcev.us>wrote:
> 
> > Guys,
> >
> > As you know, our sample rate is not good enough to decode UAT's FSK in
> > a conventional way, so I thought to try something else: use 2 samples
> > per bit to detect the frequency shift. This is obviously unreliable,
> > but I hoped to see something at least. But it didn't work: seems like
> > decoding noise.
> >
> > The code is here:
> >  https://github.com/zaitcev/ruat
> >
> > Anyone is willing to critique? Where did I go wrong?
> >
> > Thanks,
> > -- Pete




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