WSJT-X/libm65/qra64c.f90
Joe Taylor 48505621ae Progress toward full implementation of QRA64 in MAP65.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/map65@7505 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
2017-01-15 22:01:24 +00:00

178 lines
4.8 KiB
Fortran

subroutine qra64c(cx,cy,nutc,nqd,ikhz,nfqso,ntol,xpol,mycall_12, &
hiscall_12,hisgrid_6,nwrite_qra64)
use packjt
parameter (NFFT2=336000) !56*6000 (downsampled by 1/16)
parameter (NMAX=60*12000,LN=1152*63)
! Required input data:
! nutc,cx,cy,nf1,nf2,nfqso,ntol,mode64,minsync,ndepth,emedelay,
! mycall_12,hiscall_12,hisgrid_6
character decoded*22
character*12 mycall_12,hiscall_12
character*6 mycall,hiscall,hisgrid_6
character*4 hisgrid
character*1 cp,cmode
logical xpol,ltext
complex cx(0:NFFT2-1),cy(0:NFFT2-1)
complex c00(0:720000) !Complex spectrum of dd()
complex c0(0:720000) !Complex data for dd()
real a(3)
real s3(LN) !Symbol spectra
real s3a(LN) !Symbol spectra
integer dat4(12) !Decoded message (as 12 integers)
integer dat4x(12)
integer nap(0:11)
data nap/0,2,3,2,3,4,2,3,6,4,6,6/,cmode/'$'/
data nc1z/-1/,nc2z/-1/,ng2z/-1/,maxaptypez/-1/
save
! For now:
nf1=-3000
nf2=3000
mode64=1
minsync=-1
ndepth=3
emedelay=2.5
irc=-1
nwrite_qra64=0
decoded=' '
nft=99
mycall=mycall_12(1:6)
hiscall=hiscall_12(1:6)
hisgrid=hisgrid_6(1:4)
call packcall(mycall,nc1,ltext)
call packcall(hiscall,nc2,ltext)
call packgrid(hisgrid,ng2,ltext)
nSubmode=0
if(mode64.eq.2) nSubmode=1
if(mode64.eq.4) nSubmode=2
if(mode64.eq.8) nSubmode=3
if(mode64.eq.16) nSubmode=4
b90=1.0
nFadingModel=1
maxaptype=4
if(iand(ndepth,64).ne.0) maxaptype=5
if(nc1.ne.nc1z .or. nc2.ne.nc2z .or. ng2.ne.ng2z .or. &
maxaptype.ne.maxaptypez) then
do naptype=0,maxaptype
if(naptype.eq.2 .and. maxaptype.eq.4) cycle
call qra64_dec(s3,nc1,nc2,ng2,naptype,1,nSubmode,b90, &
nFadingModel,dat4,snr2,irc)
enddo
nc1z=nc1
nc2z=nc2
ng2z=ng2
maxaptypez=maxaptype
endif
naptype=maxaptype
npts2=NFFT2
!###
c00(0:NFFT2-1)=conjg(cy)
!###
call sync64(c00,nf1,nf2,nfqso,ntol,mode64,emedelay,dtx,f0,jpk0,sync, &
sync2,width)
nfreq=nint(f0)
if(mode64.eq.1 .and. minsync.ge.0 .and. (sync-7.0).lt.minsync) go to 900
a=0.
a(1)=-f0
call twkfreq(c00,c0,npts2,6000.0,a)
irc=-99
s3lim=20.
itz=11
if(mode64.eq.4) itz=9
if(mode64.eq.2) itz=7
if(mode64.eq.1) itz=5
LL=64*(mode64+2)
NN=63
napmin=99
do itry0=1,5
idt=itry0/2
if(mod(itry0,2).eq.0) idt=-idt
jpk=jpk0 + 750*idt
call spec64(c0,npts2,mode64,jpk,s3a,LL,NN)
call pctile(s3a,LL*NN,40,base)
s3a=s3a/base
where(s3a(1:LL*NN)>s3lim) s3a(1:LL*NN)=s3lim
do iter=itz,0,-2
b90=1.728**iter
if(b90.gt.230.0) cycle
if(b90.lt.0.15*width) exit
s3(1:LL*NN)=s3a(1:LL*NN)
call timer('qra64_de',0)
call qra64_dec(s3,nc1,nc2,ng2,naptype,0,nSubmode,b90, &
nFadingModel,dat4,snr2,irc)
call timer('qra64_de',1)
if(irc.eq.0) go to 10
if(irc.gt.0) call badmsg(irc,dat4,nc1,nc2,ng2)
iirc=max(0,min(irc,11))
if(irc.gt.0 .and. nap(iirc).lt.napmin) then
dat4x=dat4
b90x=b90
snr2x=snr2
napmin=nap(iirc)
irckeep=irc
dtxkeep=jpk/6000.0 - 1.0
itry0keep=itry0
iterkeep=iter
endif
enddo
if(irc.eq.0) exit
enddo
if(napmin.ne.99) then
dat4=dat4x
b90=b90x
snr2=snr2x
irc=irckeep
dtx=dtxkeep
itry0=itry0keep
iter=iterkeep
endif
10 decoded=' '
if(irc.ge.0) then
call unpackmsg(dat4,decoded) !Unpack the user message
call fmtmsg(decoded,iz)
if(index(decoded,"000AAA ").ge.1) then
! Suppress a certain type of garbage decode.
decoded=' '
irc=-1
endif
nft=100 + irc
nsnr=nint(snr2)
else
snr2=0.
endif
900 if(irc.lt.0) then
sy=max(1.0,sync)
if(nSubmode.eq.0) nsnr=nint(10.0*log10(sy)-35.0) !A
if(nSubmode.eq.1) nsnr=nint(10.0*log10(sy)-34.0) !B
if(nSubmode.eq.2) nsnr=nint(10.0*log10(sy)-29.0) !C
if(nSubmode.eq.3) nsnr=nint(10.0*log10(sy)-29.0) !D
if(nSubmode.eq.4) nsnr=nint(10.0*log10(sy)-24.0) !E
endif
npol=0
cp='H'
ntxpol=0
if(irc.ge.0) then
write(*,1010) ikHz,nfreq,npol,nutc,dtx,nsnr,cmode,decoded,irc,ntxpol,cp
1010 format('!',i3,i5,i4,i6.4,f5.1,i5,a1,1x,a22,i2,i5,1x,a1)
nwrite_qra64=nwrite_qra64+1
else
write(*,1010) ikHz,nfreq,npol,nutc,dtx,nsnr,cmode
nwrite_qra64=nwrite_qra64+1
endif
999 return
end subroutine qra64c