Really Im not waiting for an identical signal in the receiver, but at
least
similar.
Im conscious about my thinking and some thinks in electronic
communications
are not clearly for me, I need to learn a lot of concepts in electronics
communications, but working with, by example, usrp module and with help
of
people, like you, Im learning more and more things.
Now, the transceiver is working!!, I adjusted some parameters in the tx
and
finally the received signal is similar to the transmitted signal, in the
image you can see the received signal in time and freq. domain.
The next step is to work with FM tx and rx using complex envelope, now
the
question is: There is a math cosine and sine block in grc???
Marcus, thanks for all your help