[time-nuts] L1/L2 GPS Receiver

Magnus Danielson magnus at rubidium.dyndns.org
Fri Jan 17 14:35:20 EST 2014


On 2014-01-16 20:29, Hal Murray wrote:
>
> anders.e.e.wallin at gmail.com said:
>> The real benefit of dual-frequency is you can do post-processing with PPP.
>> Javad has some modules but they start at 3 kUSD - if anyone knows of hobby
>> level priced L1/L2 receivers that can produce rinex-files for PPP processing
>> that would be interesting!
>
> Has anybody considered doing it in software?
>
> If I wanted to play with that sort of stuff, is there any particular SDR
> hardware package/project that would good to start with?

Well, considering that you will need to get the P(Y) signal at 10,23 
Mchip/s on both L1 and L2, requiring say 40 Msamples/s for both 
frequencies, and that you will need to do it for say 12 channeles and a 
bit of interesting processing beyond doing the same amount of channels 
for the C/A code, it will be an interesting challenge to do that in CPU 
code, rather than doing the "baseband-processing" in some form of 
hardware/FPGA.

Cheers,
Magnus



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