Hello,
I want to calculate BER between 2 USRPs connected via coaxial cable. For that
reason my aim is to send bits and pick them in the receiver. Then, in another
application (not with GNUradio), calculate BER with both sequences, the one
sent and the one received.
In the transmitter I use the example benchmark_tx.py but changing some things
in the transmit_path:
self.source = gr.vector_source_b(data,False) #data = (0,1,1,0,1,0...)
# use the modulator dbpsk
self.mod = blks2.dbpsk_mod()
# Set the USRP for maximum transmit gain
# (Note that on the RFX cards this is a nop.)
self.set_gain(self.subdev.gain_range()[1])
self.amp = gr.multiply_const_cc(1)
self.set_tx_amplitude(self._tx_amplitude)
# Create and setup transmit path flow graph
self.connect(self.source, self.mod, self.amp, self.u)
So I just send bits without any packet format.
In the receiver, the receive_path is changed as:
self.sink = gr.vector_sink_b()
self.connect(self.u, self.demod, self.sink)
But the problem is how to get the data from self.sink. I have been thinking of
doing a thread that blocks when no data, runs when something arrives to the
USRP, and have everything in an infinitive loop. But I dont really know how to
do it... any suggestions??
Thank you so much,
Sergio.
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