Thank you for your help, Nick, Christoph, and Achilleas! @Christoph > How close to 1 did you use thresholds for the relative threshold method? > For the relative threshold method I use thresholds between 1-exp(-5) > .. 1-exp(-8).
Even with 1-exp(-15) I get many false positive detections. And it seems to get worse over time. The longer the flowgraph runs, the more false positives are detected. I guess that somehow has to do with the way that the threshold is updated in the relative mode? But that's speculation.. @Nick > The magnitude of the correlation depends on the magnitude of your signal. The > AGC normalizes the signal amplitude before the correlator, so you see > expected behavior. The correlation estimator block expects the input to have > a normalized amplitude. @Achilleas > This means that if one wants to build a correlator that works with an > arbitrary scaling "a" (suppose a genie gave you that at the Rx), the only > thing you should have to do is to > put as the parameter "threshold" in the block the quantity "a fraction". > This would make the whole system transparent: no matter what the scaling is, > your estimator would work exactly the same. > HOWEVER, as it turns out the "correct" scaling that works for this block is > to set "threshold= a^2 fraction". > This is really weird and I do not see any intuition behind that type of > scaling... As genies are currently busy with forecasting the Covid-19 situation, I'll stick with an AGC3 block prior to the Estimator. ;-) Best regards Fabian