Re: forked projects?

Any additional comments?  Andrew, what do you think?

Cliff
----- Original Message ----- 
From: "Krzysztof Kamieniecki" <[email protected]>
To: <[email protected]>
Sent: Thursday, March 31, 2005 7:47 PM
Subject: Re: [OpenSource_GPS] forked projects?


> I think a common interface between tracking and position fixing may be
needed. There are several
> groups of people that are interested in different layers of GPS receivers
with different sets of
> hardware. (pure SW, correlator chipsets, FPGAs / ASICs)
>
>
> Here is what I have been pondering, as a minimal API.
>
> Each correlator/tracker  sends an asynchronous symbol up the chain at
about (1kS/s)
>
> All of the correlator/tracker PLL and DLL phases and cycle counts have to
be sampled at the same
> time and sent up the chain. This would also have to include an internal
clock value and/or sample count.
>
> The position fixing level would need to allocate and setup correlators
based on which SVs are in view.
>
>
> Good, Bad, Stupid?
>
> Matt Ettus wrote:
>
> >
> > I am embarking on a project to build a GPS receiver in software around
my
> > hardware, the Universal Software Radio Peripheral (USRP, see
> > http://www.ettus.com for more info).  I wanted to use OpenSourceGPS to
do the
> > position fixes, but I'll have to do my own tracking, etc.
> >
> > My question is this -- it seems that there are several disparate efforts
around
> > the same code base.  There's a PCI one, RTAI linux-based one, and a
couple for
> > some different hardware.  Is there a common code repository for these?
Or have
> > they forked?  It would be nice to adapt the main code base so that
different
> > hardware and operating systems could be used without duplicating effort
on the
> > common parts.
> >
> > Thanks,
> > Matt Ettus
> > Ettus Research LLC
> >
> >
> > _______________________________________________
> > opensource_gps mailing list
> > [email protected]
> > http://lists.psas.pdx.edu/cgi-bin/mailman/listinfo/opensource_gps
> >
>
> -- 
> Krzysztof Kamieniecki
> callsign:KB1KLB
> mailto:[email protected]
>
> _______________________________________________
> opensource_gps mailing list
> [email protected]
> http://lists.psas.pdx.edu/cgi-bin/mailman/listinfo/opensource_gps
>