Just came across a typo in gr_fmdet_cf.cc
(compare to previous version to see the correct code). Line 87 currently
reads:
Sdot = d_scl * (-S0+d_8*S1-d_8*S1+S4);
Note that the middle two terms are identical
and therefore don't do anything. The correct code should read:
Sdot = d_scl * (-S0+d_8*S1-d_8*S3+S4);
I am no longer actively working with
GR and don't recall how to submit a patch request, plus my version is very
old. I'd appreciate somebody putting the patch in for me.