Hi:
I recently used the GRC to test my Pi/4 DQPSK modulation and
demodulation block.But and my
flow graph is vector_source->packet_encoder->pi/4 dqpsk
mod->mutily_const->usrp_sink, usrp_source->
pi/4 dqpsk demod->packet_decoder->file_sink.but in my file_sink I got
nothing.It seem that there is no
data output the packet_decoder.then I change the modulator to DQPSK,but there
is still nothing output the
packder_decoder block. And I confirm that there is data input the
packer_decoder block.Why did it happen?
Inter.
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