[time-nuts] GPS SDR (was: FE-.5680A trimming resolution)

[Jim Lux]

On 2/2/12 12:05 PM, Daniel Schultz wrote:
> I found this homebrew GPS receiver project recently:
>
> http://www.holmea.demon.co.uk/GPS/Main.htm
>
> No custom specialized chips that are unavailable in small quantities, or which
> will go obsolete in a few months. I think the best solution for the open
> source GPS community is to design open source receivers with commodity parts
> that won't be discontinued in the near future, or for which another commodity
> part can be substituted if need be. Maybe somebody can extend this design with
> a 2-bit ADC on the end (not me, too many projects here already...)
>
> Dan Schultz N8FGV
>

I still think that finding appropriate off the shelf parts to make a 
subharmonic sampler would be a better strategy..

It's all about whether you want IF filters and a mixer+LO or RF filters. 
  I think the amps are the same either way.