Re: [Discuss-gnuradio] USRP and RFID

[Matthias Wilhelm]

Hi, 

there is a project for Gen2 RFID chips, they have a reader implementation for 
the USRP1 and a monitoring tool to eavesdrop on reader-tag communication for 
the USRP2:
https://www.cgran.org/wiki/Gen2

There are also papers on the design posted there. They had to tinker with the 
USB driver as well because of timing issues with the reader. 

I think Gen2 is only ~868MHz, I don't know if the code can be adapted to 
13.56MHz stuff.  And for a (duplex) reader you will need a URSP1 there, because 
two 900-daughterboards are required. It may be possible out of the box to build 
a reader for 13.56MHz with the USRP2, as you have two "half"-daughterboards.

For the protocol implementation, you can take a look at
http://www.libnfc.org
it seems that they have some Gen1 support and you only have to implement the 
physical layer in gnuradio.

We are currently thinking to start a RFID project as well, so I'm interested 
what you find out.  

Matthias


Am 25.08.2010 um 16:38 schrieb address@hidden:

> Hello!
> 
> We are just working on a project aiming at investigating the use of the
> Ettus USRP device concerning RFID sniffing. According to the manuals,
> purchasing the LFTX and the RFTX devices should be suitable for being able
> to talk to 125kHz and 13,56Mhz RFID devices. What kind of antennas do you
> recommend for this purpose? Will simple loops of copper suffice?
> 
> Are there any tutorials or papers available which concentrate on using
> Gnuradio in terms of RFID? I know that OpenPCD & Co might offer an easier
> way to go, but as I want to learn about the stuff I decided to go the more
> difficult way.
> 
> Thanks for your help any kind of comment,
> Fabian Steiner