Hey Laura,
Have you tried the vanilla complex 'fft' block? If you generate the full
spectra including negative frequencies before inputting (I think there's a
mirror_spectrum block that might do this(?)), I would have thought you
could add two input streams together, as streamA + j*streamB. Since
Make sure you have the right permissions for the port, i.e. do:
ls -l /dev/ttyUSB0
and make sure you have permissions.
On a lot of systems, the ttyUSB* are in the dialout group, so if you add
your username to that group and log out and back in, you should be able to
access it.
Glenn
On Thu, Dec
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