2011/11/18 山本弘貴 <k.yamamoto.0...@gmail.com>:
> Hi, All
> I have very trouble
> My experiment enviroment isUBUNTU 11.04 , USRP N200, DBSRX2 ,active
> antenna and gnuradio
> I am worrying about good software GPS receiver is not exist .
> I want to receive L1 signal , and want to demodulate that signal
> However GPS signal is used Spread spectrum modulation scheme.
> I try to creating gnuradio-companion's blocks.(use to Spread spectrum
> demodulation blocks)
> but that is very difficult so Now I think method is
>
> GPS L1 signal → USRP N200 → gnuradio-companion(UHD_source→File_sink)
> → software decode soft → output(Location data)
>
>
> Eventually I want to Calculate location data,
> Please let me know if you're a good this way
I recently came across this product listing at Spark Fun:
http://www.sparkfun.com/products/10981
Which has a link to a book all about GPS receiving and even comes with
MATLAB source code:
http://www.amazon.com/Software-Defined-GPS-Galileo-Receiver-Single-Frequency/dp/0817643907
I am sure, with the source, you could adapt it to use the USRP
recorded signal, and then possibly port the MATLAB over to either
Python (using Josh's signal processing in Python blocks) or straight
C++.
> I am sorry that My English is not good
>
> Kouki
Good luck - it's definitely not a trivial task, but it sounds extremely fun.
Brian
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