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Re: [Discuss-gnuradio] GPS on DBSRX

From: Trond Danielsen
Subject: Re: [Discuss-gnuradio] GPS on DBSRX
Date: Wed, 23 May 2007 23:33:47 +0200

2007/5/23, Ben Loftin <address@hidden>:

I have successfully done coarse acquisition using the correlator developed


A plot of the 'acquisition' is here

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,

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

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:

The current version has been tested against signals generated by a
Spirent GPS simulator. The recorded data files are available from

Please let me know if you have any feedback.

Trond Danielsen

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