On Sun, 2020-06-28 at 16:31 -0500, Alex Roberts wrote: > Andy, > > I had a copy of an old flowgraph that you posted on the mailing list > a long while back ( > https://lists.gnu.org/archive/html/discuss-gnuradio/2016-03/msg00735.html > ). This is what initially confused me on what to pass in as gmsk > symbols to corr_est block as it has strictly real values. > > I modified it to mux in the preamble that's in the octave code with a > random source. I also modified the octave code to match the samples > per symbol of the flowgraph (10) and generated the modulated symbols > for the corr_est block. The corr_est block does indeed > perform conjugation and reversal of the symbols, so I used the "h_iq" > value from the octave code as the modulated symbols since it has not > been conjugated or reversed. I'm not getting corr_est tags.
On that flowgraph, set your threshold on the corr_est block to 0.23. BTW, that preamble has horrible correlation properties. > Thanks,Alex. -Andy
