Copy that. Would a preamble with better properties like a gold code allow to raise that threshold? I guess I need to dig into what that threshold means. On the examples I’ve seen it’s always 0.9 or higher.
On Monday, June 29, 2020, Andy Walls <a...@silverblocksystems.net> wrote: > 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 > >
