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Adjust the and-correction numbers for averaged Q65 decodes.

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This commit is contained in:
Joe Taylor 2021-11-01 10:22:41 -04:00
parent 93ade73af7
commit 994e00c5d2
1 changed files with 3 additions and 3 deletions
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lib/qra/q65/q65.f90
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@ -785,9 +785,9 @@ subroutine q65_snr(dat4,dtdec,f0dec,mode_q65,nused,snr2)
sig_area=sum(spec(ia+nsum:ib-nsum)-1.0) sig_area=sum(spec(ia+nsum:ib-nsum)-1.0)
w_equiv=sig_area/(smax-1.0) w_equiv=sig_area/(smax-1.0)
snr2=db(max(1.0,sig_area)) - db(2500.0/df) snr2=db(max(1.0,sig_area)) - db(2500.0/df)
if(nused.eq.2) snr2=snr2 - 2.0 if(nused.eq.2) snr2=snr2 - 1.5
if(nused.eq.3) snr2=snr2 - 2.9 if(nused.eq.3) snr2=snr2 - 2.4
if(nused.ge.4) snr2=snr2 - 3.5 if(nused.ge.4) snr2=snr2 - 3.0
return return
end subroutine q65_snr end subroutine q65_snr