Re: [Discuss-gnuradio] GPS on DBSRX

[Trond Danielsen]

2007/5/23, Ben Loftin <address@hidden>:
> Chris,
>
> I have successfully done coarse acquisition using the correlator developed
> here,
>
> https://projects.cecs.pdx.edu/~icarroll/SoftwareGPSCorrelator/index.cgi/wiki
>
> A plot of the 'acquisition' is here
>
> http://64.6.242.226/grblog/uploaded_images/sat_18-714418.png
>
> for satellite PRN 18 with a code offset of 1988 as shown by the 'spike'.  The
> gain for the dbsrx was 86 dB while using an active external antenna to get 28
> dB more of gain.  More details on my blog,
>
> http://64.6.242.226/grblog/grblog.html
>
> Not sure if I will have a link to the sample data because it is almost 2 GB
> compressed, yikes!  If you know how to break up the data let me know and I will
> upload just the begininning of the file, since it is just over a minute of
> data.

If anyone is interested, I have a complete coarse acquisition module
written for GNU Radio. The source code is available from
http://code.google.com/p/opengnss/. Some cleaning of the code is still
required. You can find images of the current results here:
http://trondd.blogspot.com/2007/05/opengnss-status.html

The current version has been tested against signals generated by a
Spirent GPS simulator. The recorded data files are available from
ftp://open-gnss.org/pub/opengnss/raw_gps_data.

Please let me know if you have any feedback.

Regards,
--
Trond Danielsen