Monday, January 19, 2009

Did I mention that...

Hello,
did I mention that with the CPLD version of the dongle we can receive Beidou-M1, the first satellite of the Chinese global navigation system?
The bird transmits a BPSK(2) on a 1561.098 MHz carrier. Slightly modifying the Matlab code from the book "A Software-Defined GPS and Galileo Receiver. A single frequency approach" by Kai Borre, Dennis M. Akos, Nicolaj Bertelsen, Peter Rinder, and Soren Holdt Jense, I got the following results:

We then decoded some subframes :)
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And soon I will publish some more results...

Michele

6 comments:

Artyom said...

I'm very interested in your devices. Do you sell them? May be you can recomend any other devices for grabbing data from navigational sattelites?

Michele Bavaro said...
This comment has been removed by the author.
Artyom said...

Thanks for quick answer. But what about FPGA version? When do you expect it will be available? And for what price? Will you produce devices with another sampling frequencies (for example 10 or 12 MHz?

Michele Bavaro said...
This comment has been removed by the author.
MyGeoTracker said...

Can you post settings? where I can find a sample file?

Michele Bavaro said...

Hi,

I cannot post the settings, but it should be pretty trivial to change N from 1536 to 1522 (I like riddles).
I don't have a file at hand (as this post is 2 years old) but if you are ready to retribute half a day of my work then I can grab one for you ;)

Bests,
Michele