mirror of https://github.com/saitohirga/WSJT-X.git
145 lines
4.2 KiB
Fortran
145 lines
4.2 KiB
Fortran
subroutine qra64a(dd,npts,nutc,nf1,nf2,nfqso,ntol,mode64,minsync,ndepth, &
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mycall_12,hiscall_12,hisgrid_6,sync,nsnr,dtx,nfreq,decoded,nft)
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use packjt
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use timer_module, only: timer
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parameter (NMAX=60*12000,LN=1152*63)
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character decoded*22
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character*12 mycall_12,hiscall_12
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character*6 mycall,hiscall,hisgrid_6
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character*4 hisgrid
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logical ltext
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complex c00(0:720000) !Complex spectrum of dd()
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complex c0(0:720000) !Complex data for dd()
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real a(3)
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real dd(NMAX) !Raw data sampled at 12000 Hz
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real s3(LN) !Symbol spectra
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real s3a(LN) !Symbol spectra
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integer dat4(12) !Decoded message (as 12 integers)
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integer dat4x(12)
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integer nap(0:11)
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data nap/0,2,3,2,3,4,2,3,6,4,6,6/
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data nc1z/-1/,nc2z/-1/,ng2z/-1/,maxaptypez/-1/
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save
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call timer('qra64a ',0)
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decoded=' '
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if(nfqso.lt.nf1 .or. nfqso.gt.nf2) go to 900
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nft=99
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nsnr=-30
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mycall=mycall_12(1:6) !### May need fixing ###
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hiscall=hiscall_12(1:6)
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hisgrid=hisgrid_6(1:4)
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call packcall(mycall,nc1,ltext)
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call packcall(hiscall,nc2,ltext)
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call packgrid(hisgrid,ng2,ltext)
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nSubmode=0
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if(mode64.eq.2) nSubmode=1
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if(mode64.eq.4) nSubmode=2
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if(mode64.eq.8) nSubmode=3
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if(mode64.eq.16) nSubmode=4
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b90=1.0
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nFadingModel=1
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maxaptype=4
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if(iand(ndepth,64).ne.0) maxaptype=5
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if(nc1.ne.nc1z .or. nc2.ne.nc2z .or. ng2.ne.ng2z .or. &
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maxaptype.ne.maxaptypez) then
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do naptype=0,maxaptype
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if(naptype.eq.2 .and. maxaptype.eq.4) cycle
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call qra64_dec(s3,nc1,nc2,ng2,naptype,1,nSubmode,b90, &
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nFadingModel,dat4,snr2,irc)
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enddo
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nc1z=nc1
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nc2z=nc2
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ng2z=ng2
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maxaptypez=maxaptype
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endif
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naptype=maxaptype
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maxf1=0
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call timer('sync64 ',0)
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call sync64(dd,npts,nf1,nf2,nfqso,ntol,mode64,maxf1,dtx,f0,jpk,kpk,sync,c00)
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call timer('sync64 ',1)
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irc=-99
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if(sync.lt.float(minsync)) go to 900
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npts2=npts/2
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itz=11
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if(mode64.eq.4) itz=9
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if(mode64.eq.2) itz=7
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if(mode64.eq.1) itz=5
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LL=64*(mode64+2)
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NN=63
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! do itry0=1,3
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do itry0=1,1
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idf0=itry0/2
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if(mod(itry0,2).eq.0) idf0=-idf0
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a(1)=-(f0+0.248*(idf0-0.33*kpk))
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nfreq=nint(-a(1))
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a(3)=0.
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! do itry1=1,3
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do itry1=1,1
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idf1=itry1/2
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if(mod(itry1,2).eq.0) idf1=-idf1
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a(2)=-0.67*(idf1 + 0.67*kpk)
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call twkfreq(c00,c0,npts2,6000.0,a)
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call spec64(c0,npts2,mode64,jpk,s3a,LL,NN)
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napmin=99
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do iter=itz,0,-2
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b90=1.728**iter
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s3(1:LL*NN)=s3a(1:LL*NN)
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call timer('qra64_de',0)
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call qra64_dec(s3,nc1,nc2,ng2,naptype,0,nSubmode,b90, &
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nFadingModel,dat4,snr2,irc)
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call timer('qra64_de',1)
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if(abs(snr2).gt.30.) snr2=-30.0
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if(irc.eq.0) go to 10
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if(irc.gt.0) call badmsg(irc,dat4,nc1,nc2,ng2)
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if(irc.lt.0) cycle
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iirc=max(0,min(irc,11))
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if(irc.gt.0 .and. nap(iirc).le.napmin) then
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dat4x=dat4
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b90x=b90
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snr2x=snr2
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napmin=nap(iirc)
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irckeep=irc
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endif
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enddo
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if(napmin.ne.99) then
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dat4=dat4x
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b90=b90x
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snr2=snr2x
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irc=irckeep
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endif
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10 decoded=' '
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if(irc.ge.0) then
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call unpackmsg(dat4,decoded) !Unpack the user message
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call fmtmsg(decoded,iz)
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nft=100 + irc
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nsnr=nint(snr2)
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else
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snr2=0.
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endif
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enddo
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enddo
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900 continue
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if(index(decoded,"000AAA ").ge.1) then
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! Suppress a certain type of garbage decode.
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decoded=' '
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irc=-1
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endif
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if(irc.lt.0) then
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sy=max(1.0,sync+1.0)
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if(nSubmode.eq.0) nsnr=nint(10.0*log10(sy)-38.0) !A
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if(nSubmode.eq.1) nsnr=nint(10.0*log10(sy)-36.0) !B
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if(nSubmode.eq.2) nsnr=nint(10.0*log10(sy)-34.0) !C
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if(nSubmode.eq.3) nsnr=nint(10.0*log10(sy)-29.0) !D
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if(nSubmode.eq.4) nsnr=nint(10.0*log10(sy)-24.0) !E
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endif
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call timer('qra64a ',1)
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return
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end subroutine qra64a
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