[Discuss-gnuradio] Complex samples format with ASK modulation

[Marco Bottino]

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