On 01/02/12 15:07, John Ackermann N8UR wrote:
There've been numerous threads on the Gnuradio mailing list about code to receive GPS using the Ettus Research USRP hardware. I don't know whether anyone has actually made it work, but it appears that it's been the subject of quite a few academic projects.
I bought one of those GNSS samplers, pulled data from the air and actually managed to have my GPS SDR written in C scan the doppler bins and code-phases with FFT correlation techniques (with a little help of FFTW), find a bird and lock the PLL up to it... locked onto the symbols and started spitting out the sub-code info. I wrote all the code myself except for the USB application. I also spent some time to start calculating position and such.
I will have to get one of those Ettus Research devices to be able to do anything useful thought.
So, it is certainly possible. Takes a few of the software GPS books alongside the ICD-GPS-200 and traditional GPS books to piece together the full suite of references, but it didn't take THAT long to get where I where.
Cheers, Magnus _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
