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[Discuss-gnuradio] new to GNU radio

From: Manav Rohil
Subject: [Discuss-gnuradio] new to GNU radio
Date: Sun, 2 Mar 2008 22:35:06 +0100


I am new to gnu radio and am trying to understand how a packet
transmission happens using GNU radio

I am looking at benchmark_tx.py and benchmark_rx.py.I understood that
this is the top block which uses transmit_py and receive_py as the
underlying blocks.
I am using DQPSK for modulation.I went through dbpsk.py to understand
how the modulation is done.What i couldnt find out is where is the bit
stream modulated with the carrier frequency.From the theory of QPSK i
know that the phase of the carrier is changed depending if the bit that
modulates it is '1' or '0'.
I cant figure out where this happens in the code.

My eventual aim is to put a block for BPSK in place.Any pointers on how
to do it will use greatly appreciated

Please help me

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