[time-nuts] GPS timing receivers - what now?

Poul-Henning Kamp phk at phk.freebsd.dk
Wed Jul 20 15:38:30 EDT 2005

In message <4D57CA67-9887-4B59-82DB-E82EC06EE5BA at jcmco.com>, Jim Miller writes:
>On Jul 20, 2005, at 3:06 PM, Poul-Henning Kamp wrote:
>> The really interesting one would be to get a pci board with the
>> "host-assisted" SiRF GPS chip and be able to do our own math on
>> the raw measurements :-)
>Another (probably crazy) thought came to mind... I wonder if the  
>GNURadio can be used to demodulate signals at L1 either directly or  
>through a downconverter/LNB..  We could make a software defined GPS  
>receiver - a GNUGPS!  Twiddling the software could make it support  
>Galileo..or Glonass.. or the new civilian GPS frequencies.

I belive there is a radio-frontend in the works which will cover
the L1 frequency but the USB2 bandwidth is limited to 6 MHz
of spectrum so I'm not sure how creative we can get.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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