mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-26 06:08:42 -05:00
c8e340cf88
2. Suppress rare QRA64 garbage decodes that contain "000AAA". git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7033 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
85 lines
2.6 KiB
Fortran
85 lines
2.6 KiB
Fortran
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
|
|
|
|
if(nfqso.lt.nf1 .or. nfqso.gt.nf2) go to 900
|
|
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
|
|
if(index(decoded,"000AAA ").ge.1) then
|
|
! Suppress a certain type of garbage decode.
|
|
decoded=' '
|
|
irc=-1
|
|
endif
|
|
|
|
return
|
|
end subroutine qra64a
|