mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-08 10:06:11 -05:00
162 lines
4.6 KiB
Fortran
162 lines
4.6 KiB
Fortran
subroutine q65_avg(nutc,ntrperiod,mode_q65,LL,nfqso,ntol,lclearave, &
|
|
baud,nsubmode,ibwa,ibwb,codewords,ncw,xdt,f0,snr1,s3)
|
|
|
|
! Accumulate Q65 spectra s3(LL,63) and associated parameters for
|
|
! message averaging.
|
|
|
|
use q65
|
|
use packjt77
|
|
parameter (PLOG_MIN=-240.0) !List decoding threshold
|
|
character*37 avemsg
|
|
character*1 csync,cused(MAXAVE)
|
|
character*6 cutc
|
|
character*77 c77
|
|
real s3(-64:LL-65,63) !Symbol spectra
|
|
real s3prob(0:63,63) !Symbol-value probabilities
|
|
integer iused(MAXAVE)
|
|
integer dat4(13)
|
|
integer codewords(63,206)
|
|
logical first,lclearave,unpk77_success
|
|
data first/.true./
|
|
save
|
|
|
|
if(first .or. LL.ne.LL0 .or.lclearave) then
|
|
iutc=-1
|
|
iseq=-1
|
|
f0save=0.0
|
|
dtdiff=0.2
|
|
nsave=0
|
|
LL0=LL
|
|
first=.false.
|
|
if(allocated(s3save)) deallocate(s3save)
|
|
if(allocated(s3avg)) deallocate(s3avg)
|
|
allocate(s3save(-64:LL-65,63,MAXAVE))
|
|
allocate(s3avg(-64:LL-65,63))
|
|
s3save=0.
|
|
s3avg=0.
|
|
endif
|
|
|
|
if(ntrperiod.eq.15) then
|
|
dtdiff=0.038
|
|
else if(ntrperiod.eq.30) then
|
|
dtdiff=0.08
|
|
else if(ntrperiod.eq.60) then
|
|
dtdiff=0.16
|
|
else if(ntrperiod.eq.120) then
|
|
dtdiff=0.4
|
|
else if(ntrperiod.eq.300) then
|
|
dtdiff=0.9
|
|
endif
|
|
|
|
do i=1,MAXAVE !Don't save info more than once for same UTC and freq
|
|
if(nutc.eq.iutc(i) .and. abs(nfreq-f0save(i)).le.ntol) go to 10
|
|
enddo
|
|
|
|
! Save data for message averaging
|
|
nsave=nsave+1
|
|
n=nutc
|
|
if(ntrperiod.ge.60) n=100*n
|
|
write(cutc,'(i6.6)') n
|
|
read(cutc,'(3i2)') ih,im,is
|
|
nsec=3600*ih + 60*im + is
|
|
iseq(nsave)=mod(nsec/ntrperiod,2) !T/R sequence: 0 (even) or 1 (odd)
|
|
iutc(nsave)=nutc !UTC, hhmm or hhmmss
|
|
snr1save(nsave)=snr1 !SNR from sync
|
|
xdtsave(nsave)=xdt !DT
|
|
f0save(nsave)=f0 !f0
|
|
s3save(:,:,nsave)=s3(:,:) !Symbol spectra
|
|
|
|
10 continue
|
|
|
|
!10 if(nsave.lt.2) go to 900
|
|
|
|
snr1sum=0.
|
|
xdtsum=0.
|
|
fsum=0.
|
|
nsum=0
|
|
s3avg=0.
|
|
|
|
! Find previously saved spectra that should be averaged with this one
|
|
do i=1,MAXAVE
|
|
cused(i)='.' !Flag for "not used"
|
|
if(iutc(i).lt.0) cycle
|
|
if(iseq(i).ne.iseq(nsave)) cycle !Sequence must match
|
|
! write(*,3000) i,iseq(i),nutc,iutc(i),xdt-xdtsave(i),f0-f0save(i)
|
|
!3000 format(2i2,2i5,2f7.2)
|
|
if(abs(xdt-xdtsave(i)).gt.dtdiff) cycle !DT must be close
|
|
if(abs(f0-f0save(i)).gt.float(ntol)) cycle !Freq must match
|
|
! write(*,3001) 'a',i,nsave,iseq(i),snr1,xdt,f0
|
|
!3001 format(a1,3i4,3f8.2)
|
|
cused(i)='$' !Flag for "use this one"
|
|
s3avg=s3avg + s3save(:,:,i) !Add this spectrum
|
|
snr1sum=snr1sum + snr1save(i)
|
|
xdtsum=xdtsum + xdtsave(i)
|
|
fsum=fsum + f0save(i)
|
|
nsum=nsum+1
|
|
iused(nsum)=i
|
|
enddo
|
|
if(nsum.lt.MAXAVE) iused(nsum+1)=0
|
|
|
|
! Find averages of snr1, xdt, and f0 used in this decoding attempt.
|
|
snr1ave=0.
|
|
xdtave=0.
|
|
fave=0.
|
|
if(nsum.gt.0) then
|
|
snr1ave=snr1sum/nsum
|
|
xdtave=xdtsum/nsum
|
|
fave=fsum/nsum
|
|
endif
|
|
|
|
! Write parameters for display to User in the Message Averaging window.
|
|
do i=1,nsave
|
|
if(ntrperiod.le.30) write(14,1000) cused(i),iutc(i),snr1save(i), &
|
|
xdtsave(i),f0save(i)
|
|
1000 format(a1,i7.6,f6.1,f6.2,f7.1)
|
|
if(ntrperiod.ge.60) write(14,1001) cused(i),iutc(i),snr1save(i), &
|
|
xdtsave(i),f0save(i)
|
|
1001 format(a1,i5.4,f6.1,f6.2,f7.1)
|
|
enddo
|
|
! if(nsum.lt.2) go to 900 !Must have at least 2
|
|
|
|
! Find rms scatter of DT and f0 values
|
|
sqt=0.
|
|
sqf=0.
|
|
do j=1,MAXAVE
|
|
i=iused(j)
|
|
if(i.eq.0) exit
|
|
csync='*'
|
|
sqt=sqt + (xdtsave(i)-dtave)**2
|
|
sqf=sqf + (f0save(i)-fave)**2
|
|
enddo
|
|
rmst=0.
|
|
rmsf=0.
|
|
if(nsum.ge.2) then
|
|
rmst=sqrt(sqt/(nsum-1))
|
|
rmsf=sqrt(sqf/(nsum-1))
|
|
endif
|
|
|
|
s3avg=s3avg/nsum
|
|
nFadingModel=1
|
|
do ibw=ibwa,ibwb
|
|
b90=1.72**ibw
|
|
call q65_intrinsics_ff(s3avg,nsubmode,b90/baud,nFadingModel,s3prob)
|
|
call q65_dec_fullaplist(s3avg,s3prob,codewords,ncw,esnodb,dat4,plog,irc)
|
|
if(irc.ge.0 .and. plog.ge.PLOG_MIN) then
|
|
snr2=esnodb - db(2500.0/baud) + 3.0 !Empirical adjustment
|
|
id1=1
|
|
write(c77,3050) dat4(1:12),dat4(13)/2
|
|
3050 format(12b6.6,b5.5)
|
|
call unpack77(c77,0,avemsg,unpk77_success) !Unpack to get msgsent
|
|
open(55,file='fort.55',status='unknown',position='append')
|
|
write(55,3055) nutc,ibw,xdt,f0,85.0*base,ccfmax,snr2,plog, &
|
|
irc,trim(avemsg)
|
|
3055 format(i6,i3,6f8.2,i5,2x,a)
|
|
close(55)
|
|
print*,'F ',avemsg
|
|
exit
|
|
endif
|
|
enddo
|
|
|
|
900 return
|
|
end subroutine q65_avg
|