WSJT-X/lib/qra64a.f90

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2.4 KiB
Fortran
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subroutine qra64a(dd,nutc,nf1,nf2,nfqso,ntol,mode64,mycall_12,hiscall_12, &
hisgrid_6,sync,nsnr,dtx,nfreq,decoded,nft)
use packjt
parameter (NFFT=2*6912,NZ=5760,NMAX=60*12000)
character decoded*22
character*12 mycall_12,hiscall_12
character*6 mycall,hiscall,hisgrid_6
character*4 hisgrid
logical ltext
complex c00(0:360000) !Complex spectrum of dd()
complex c0(0:360000) !Complex spectrum of dd()
! integer*8 count0,count1,clkfreq
real a(3)
real dd(NMAX) !Raw data sampled at 12000 Hz
real s3(0:63,1:63) !Symbol spectra
integer dat4(12) !Decoded message (as 12 integers)
integer icos7(0:6)
data icos7/2,5,6,0,4,1,3/ !Costas 7x7 pattern
data nc1z/-1/,nc2z/-1/,ng2z/-1/
save
nft=99
nsnr=-30
mycall=mycall_12(1:6) !### May need fixing ###
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)
if(nc1.ne.nc1z .or. nc2.ne.nc2z .or. ng2.ne.ng2z) then
do naptype=0,5
call qra64_dec(s3,nc1,nc2,ng2,naptype,1,dat4,snr2,irc)
enddo
nc1z=nc1
nc2z=nc2
ng2z=ng2
endif
maxf1=5
call sync64(dd,nf1,nf2,nfqso,ntol,mode64,maxf1,dtx,f0,jpk,kpk,snr1,c00)
npts2=216000
naptype=4
do itry0=1,3
idf0=itry0/2
if(mod(itry0,2).eq.0) idf0=-idf0
a(1)=-(f0+0.248*(idf0-0.33*kpk))
nfreq=nint(-a(1))
a(3)=0.
do itry1=1,3
idf1=itry1/2
if(mod(itry1,2).eq.0) idf1=-idf1
a(2)=-0.67*(idf1 + 0.67*kpk)
call twkfreq(c00,c0,npts2,4000.0,a)
call spec64(c0,npts2,mode64,jpk,s3)
call qra64_dec(s3,nc1,nc2,ng2,naptype,0,dat4,snr2,irc)
decoded=' '
if(irc.ge.0) then
call unpackmsg(dat4,decoded) !Unpack the user message
call fmtmsg(decoded,iz)
nft=100 + irc
nsnr=nint(snr2)
else
snr2=0.
endif
! write(78,3900) nutc,snr1,snr2,dtx,nfreq,kpk,idf0,idf1,irc,decoded
!3900 format(i4.4,2f6.1,f6.2,i5,4i3,1x,a22)
! flush(78)
! write(*,3006) idf0,idf1,nfreq,jpk,kpk,irc,decoded
!3006 format(2i4,i6,i7,2i4,2x,a22)
if(irc.ge.0) go to 900
enddo
enddo
900 continue
return
end subroutine qra64a