Re: [Discuss-gnuradio] ask : USRP Mode-S/ADS-B project

[Eric A. Cottrell]

Bino Oetomo wrote:
> Dear All
>
> I'm just searching about low cost ADS-B Receiver/Decoder solution.
> First, I found most people using SBS-1/RadarBox. They need to use 
> propietary BaseStation software.
> But there is pio that looks like have a good progress on handling the 
> output for linux and OS-x
> http://piopawlu.net/2008/04/15/sbs1-under-linux-and-mac-os-x/
>
> And then I found GNU-Radio.
> I search the discussion archieve ... and looks like Eric have magic 
> work on it.
> So .. how is the stage of this GNU-Radio USRP Mode-S project ?
> Is there any specific distribution for non technical people that just 
> want to dumb decoded mode-s message to a console or pipe it to another 
> program/script ?
>
> Regards
> -bino-
Hello,

The code is still a work-in-progress.  The hardware used, the USRP and 
DBSRX board, costs as much or slightly more than the RadarBox or SBS-1.  
It might be possible to do a simplified hardware board but I am not a 
hardware engineer.  Mode-S/ADS-B has a 1 Megabit symbol rate which is 
way above what a sound card can do.

The code decodes to raw frames and the source is under my developer 
branch in the gnuradio repository.  I need to convert it to use the new 
mblock scheme and to write some better output formatters and decoders.  
Mode-S and ADS-B are complex protocols.

My 1090 antenna was down for the winter and I am planning on putting up 
a better antenna even higher after the snow melts and the weather gets 
better.

73 Eric