Hi. I am testing my custom modulation scheme ppm.py. I followed this post http://lists.gnu.org/archive/html/discuss-gnuradio/2010-12/msg00265.html to register this modulation into mods/demods. I added a line import ppm in my benchmark_tx.py. I also tried placing the ppm.py file in blks2impl directory. However neither method worked. The result from "print digital.modulation_utils.type_1_mods()" did not contain ppm. Another issue is that I modified digital_constellation.cc, and I called functions in the modified digital_constellation.cc in my ppm.py. In this case should I rebuild gnuradio? If not, what should I do? Any suggestions? Thanks! Fei
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