Hello Marco I not familiar with RFID ASK10% or ASK100%.
(1) I use usrp -> sinkfft. I can see the wave and tune the target frequency to 13.56MHz However, I don't understand the question "why USRP outputs I/Q samples?" I have to reading more knowledge about communication theory. (2) You want to plot in the time domain When I got RFID signal, I will do demodulation and get the information carried by the phase. I still trying. CJay Marco Bottino wrote: > hello everybody, > > I am using the USRP with LFRX daughterboard to catch an RFID signal ASK > modulated (frequency 13.56MHz, decimation factor 16). > I really need an help because I don't understand very well the meaning > of the > outputs of my USRP: if the information related to the ASK is only the > amplitude, so why USRP outputs I/Q samples? > Which is the meaning of the Q samples? Which is the information carried > by the > phase (that should not be important in ASK modulation)? > If I want to plot in the time domain the samples got, which kind of > operation is > necessary (given that I would compare my result with the > usrp_oscope.py)? > > Any kind of help will be really well appreciated. > Thank you, > > Marco -- Posted via http://www.ruby-forum.com/. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
