When USRP down convert the passband signal, does it perform phase
estimation?
Or in other words, does the phase of the sin wave from the local
oscillator
lock to the phase of the incoming signal?
Phase is needed in coherent demodulation. I just want to know where it
is
performed in the USRP and GNU radio. I conjecture that the USRP does not
estimate the phase and the demodulator does phase estimation, for
example,
in gr_mpsk_receiver_cc. But I am not sure.
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