GNU Radio Companion - BPSK Pulse shaping
How to convert a digital data stream to a baseband analog signal using the built-in constellation modulator block.
Prepared by Dr. Aaron Scher
[email protected]
Oregon Institute of Technology
Back to My collection of GNU radio companion flow graphs
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(Last updated: Oct 2015)
You can also create an eye diagram by replacing the repeating vector source with a random binary pattern generator
and using a WX Gui Scope Sink. To see the eye pattern set the trigger mode of the WX Gui Scope Sink
to "free run" and run the simulation. In the scope plot, turn on Persistance and set analog alpha as close to zero as possible.
Below is the flow graph. Note that I included the Channel model block. This way I can see how the eye "closes" with
with noise.