w4kek/WSJT-X
1
0
Fork 0
mirror of https://github.com/saitohirga/WSJT-X.git synced 2025-04-05 19:08:38 -04:00
Code Issues Packages Projects Releases Wiki Activity

Correct the estimate of SNR for FT4 signals.

Browse Source
This commit is contained in:
Joe Taylor 2019-01-29 13:56:04 -05:00
parent 0a6d67c1d6
commit 7e3b153d8b
1 changed files with 1 additions and 1 deletions

2
lib/ft4/ft4_decode.f90
View File

@ -74,7 +74,7 @@ subroutine ft4_decode(cdatetime0,nfqso,iwave,ndecodes,mycall,hiscall,nrx,line)
ndecodes=0
do icand=1,ncand
f0=candidate(1,icand)
xsnr=10*log10(candidate(3,icand))-15.0
xsnr=10*log10(candidate(3,icand))-18.0
if( f0.le.375.0 .or. f0.ge.(5000.0-375.0) ) cycle
call ft4_downsample(iwave,f0,cd2) ! downsample from 320 Sa/Symbol to 20 Sa/Symbol
sum2=sum(cd2*conjg(cd2))/(20.0*76)