Hi! Thanks a lot Matthias for your answer! I had a close look at the Gen2 stuff and it sounds rather promising although they are working with UHF tags.
As far as my project is concerned I will start with some basic experiments the next days: First of all, I just want see whether the general system works as expected (using usrp_fft.py, usrp_oscope.py, etc.) when emitting a continuous sine wave at 13.56Mhz and receiving the subcarrier signal afterwards. If this yields the expected results, I will let you know and take care of the modulation & demodulation thing then. Cheers, Fabian > 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 [email protected]: > >> 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 > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
