[time-nuts] SDR GPS

[Magnus Danielson]

On 24/11/11 12:19, Poul-Henning Kamp wrote:
>
> Has any of you played with this:
>
> 	http://www.sparkfun.com/products/8238
>

I have. I managed to log data, write code to use FFT correlation search 
and then lock-up to a good strong bird and decode the sub-code.

One has to look in a few books to "get it" but it's fun. Much harder to 
real-time decode, but I didn't spend quality time on achieving an 
efficient digital RF section.

The dataformat is inefficient with only 2 out of 8 bits used, so one 
might consider stuffing the bits, but it would be a trivial fix.

Cheers,
Magnus