Re: GPS receiver
- From: Wim Lewis <wiml@xxxxxxxx>
- Date: Sat, 8 Oct 2005 00:15:05 +0000 (UTC)
In article <11k7tnann89rm49@xxxxxxxxxxxxxxxxxx>,
Joel Kolstad <JKolstad71HatesSpam@xxxxxxxxx> wrote:
>"eeh" <eehobbyist@xxxxxxxxxxxx> wrote in message
>news:1128473875.393576.253710@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>> I want to buy a GPS receiver to analyse the base band signal for
>> University course learning purpose. Could anyone introduce me one?
>
>You could use GNURadio and a USRP to do this (although the near-baseband IF
>might end up in slightly odd locations based on which transverter you use,
>although hopefully this won't matter to you). Most GPS receivers today use a
>highly integrated IC where you don't have any access to various intermediate
>RF signals.
There are a handful of exceptions to that rule, though, and I recently
stumbled across these open-source GPS receiver projects:
http://gps.psas.pdx.edu/WebHome
http://home.earthlink.net/~cwkelley/
The chip maker's reference design is close enough to some commercial
receivers' designs that replacement firmware can be written, for
educational purposes or (presumably) for specialized tasks that
don't have a large enough market to support a commercial offering.
The two links up there are related, but the cwkelley site has some links
to other projects along the same lines.
--
Wim Lewis <wiml@xxxxxxxx>, Seattle, WA, USA. PGP keyID 27F772C1
.
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- From: Joel Kolstad
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