mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-18 10:01:57 -05:00
1a23757b26
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6122 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
205 lines
5.2 KiB
Fortran
205 lines
5.2 KiB
Fortran
subroutine iscat(cdat0,npts0,nh,npct,t2,pick,cfile6,minsync,ntol, &
|
|
NFreeze,MouseDF,mousebutton,mode4,nafc,nmore,psavg,maxlines,nlines,line)
|
|
|
|
! Decode an ISCAT signal
|
|
|
|
parameter (NMAX=30*3101)
|
|
parameter (NSZ=4*1400)
|
|
character cfile6*6 !File time
|
|
character c42*42
|
|
character msg*29,msg1*29,msgbig*29
|
|
character*80 line(100)
|
|
character csync*1
|
|
complex cdat0(NMAX)
|
|
complex cdat(NMAX)
|
|
real s0(288,NSZ)
|
|
real fs1(0:41,30)
|
|
real psavg(72) !Average spectrum of whole file
|
|
integer nsum(30)
|
|
integer ntol
|
|
integer icos(4)
|
|
logical pick,last
|
|
data icos/0,1,3,2/
|
|
data nsync/4/,nlen/2/,ndat/18/
|
|
data c42/'0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ /.?@-'/
|
|
|
|
nlines = 0
|
|
fsample=3100.78125 !Sample rate after 9/32 downsampling
|
|
nsps=144/mode4
|
|
|
|
bigworst=-1.e30 !Silence compiler warnings ...
|
|
bigxsync=0.
|
|
bigsig=-1.e30
|
|
msglenbig=0
|
|
ndf0big=0
|
|
nfdotbig=0
|
|
bigt2=0.
|
|
bigavg=0.
|
|
bigtana=0.
|
|
if(nmore.eq.-999) bigsig=-1 !... to here
|
|
|
|
last=.false.
|
|
do inf=1,6 !Loop over data-segment sizes
|
|
nframes=2**inf
|
|
if(nframes*24*nsps.gt.npts0) then
|
|
nframes=npts0/(24*nsps)
|
|
last=.true.
|
|
endif
|
|
npts=nframes*24*nsps
|
|
|
|
do ia=1,npts0-npts,nsps*24 !Loop over start times stepped by 1 frame
|
|
ib=ia+npts-1
|
|
cdat(1:npts)=cdat0(ia:ib)
|
|
t3=(ia + 0.5*npts)/fsample + 0.9
|
|
if(pick) t3=t2+t3
|
|
|
|
! Compute symbol spectra and establish sync:
|
|
call synciscat(cdat,npts,nh,npct,s0,jsym,df,ntol,NFreeze, &
|
|
MouseDF,mousebutton,mode4,nafc,psavg,xsync,sig,ndf0,msglen, &
|
|
ipk,jpk,idf,df1)
|
|
nfdot=nint(idf*df1)
|
|
|
|
isync=xsync
|
|
if(msglen.eq.0 .or. isync.lt.max(minsync,0)) then
|
|
msglen=0
|
|
worst=1.
|
|
avg=1.
|
|
ndf0=0
|
|
cycle
|
|
endif
|
|
|
|
ipk3=0 !Silence compiler warning
|
|
nblk=nsync+nlen+ndat
|
|
fs1=0.
|
|
nsum=0
|
|
nfold=jsym/96
|
|
jb=96*nfold
|
|
k=0
|
|
n=0
|
|
do j=jpk,jsym,4 !Fold information symbols into fs1
|
|
k=k+1
|
|
km=mod(k-1,nblk)+1
|
|
if(km.gt.6) then
|
|
n=n+1
|
|
m=mod(n-1,msglen)+1
|
|
ii=nint(idf*float(j-jb/2)/float(jb))
|
|
do i=0,41
|
|
iii=ii+ipk+2*i
|
|
if(iii.ge.1 .and. iii.le.288) fs1(i,m)=fs1(i,m) + s0(iii,j)
|
|
enddo
|
|
nsum(m)=nsum(m)+1
|
|
endif
|
|
enddo
|
|
|
|
do m=1,msglen
|
|
fs1(0:41,m)=fs1(0:41,m)/nsum(m)
|
|
enddo
|
|
|
|
! Read out the message contents:
|
|
msg= ' '
|
|
msg1=' '
|
|
mpk=0
|
|
worst=9999.
|
|
sum=0.
|
|
do m=1,msglen
|
|
smax=0.
|
|
smax2=0.
|
|
do i=0,41
|
|
if(fs1(i,m).gt.smax) then
|
|
smax=fs1(i,m)
|
|
ipk3=i
|
|
endif
|
|
enddo
|
|
do i=0,41
|
|
if(fs1(i,m).gt.smax2 .and. i.ne.ipk3) smax2=fs1(i,m)
|
|
enddo
|
|
rr=0.
|
|
if(smax2.gt.0.0) rr=smax/smax2
|
|
sum=sum + rr
|
|
if(rr.lt.worst) worst=rr
|
|
if(ipk3.eq.40) mpk=m
|
|
msg1(m:m)=c42(ipk3+1:ipk3+1)
|
|
enddo
|
|
|
|
avg=sum/msglen
|
|
if(mpk.eq.1) then
|
|
msg=msg1(2:)
|
|
else if(mpk.lt.msglen) then
|
|
msg=msg1(mpk+1:msglen)//msg1(1:mpk-1)
|
|
else
|
|
msg=msg1(1:msglen-1)
|
|
endif
|
|
|
|
ttot=npts/3100.78125
|
|
|
|
if(worst.gt.bigworst) then
|
|
bigworst=worst
|
|
bigavg=avg
|
|
bigxsync=xsync
|
|
bigsig=sig
|
|
ndf0big=ndf0
|
|
nfdotbig=nfdot
|
|
msgbig=msg
|
|
msglenbig=msglen
|
|
bigt2=t3
|
|
bigtana=nframes*24*nsps/fsample
|
|
endif
|
|
|
|
isync = xsync
|
|
if(navg.gt.0 .and. isync.ge.max(minsync,0) .and. maxlines.ge.2) then
|
|
nsig=nint(sig)
|
|
nworst=10.0*(worst-1.0)
|
|
navg=10.0*(avg-1.0)
|
|
if(nworst.gt.10) nworst=10
|
|
if(navg.gt.10) navg=10
|
|
tana=nframes*24*nsps/fsample
|
|
csync=' '
|
|
if(isync.ge.1) csync='*'
|
|
if(nlines.le.maxlines-1) nlines = nlines + 1
|
|
write(line(nlines),1020) cfile6,isync,nsig,t2,ndf0,nfdot,csync, &
|
|
msg(1:28),msglen,nworst,navg,tana,char(0)
|
|
endif
|
|
enddo
|
|
if(last) exit
|
|
enddo
|
|
|
|
worst=bigworst
|
|
avg=bigavg
|
|
xsync=bigxsync
|
|
sig=bigsig
|
|
ndf0=ndf0big
|
|
nfdot=nfdotbig
|
|
msg=msgbig
|
|
msglen=msglenbig
|
|
t2=bigt2
|
|
tana=bigtana
|
|
|
|
isync=xsync
|
|
nworst=10.0*(worst-1.0)
|
|
navg=10.0*(avg-1.0)
|
|
if(nworst.gt.10) nworst=10
|
|
if(navg.gt.10) navg=10
|
|
|
|
if(navg.le.0 .or. isync.lt.max(minsync,0)) then
|
|
msg=' '
|
|
nworst=0
|
|
navg=0
|
|
ndf0=0
|
|
nfdot=0
|
|
sig=-20
|
|
msglen=0
|
|
tana=0.
|
|
t2=0.
|
|
endif
|
|
csync=' '
|
|
if(isync.ge.1) csync='*'
|
|
nsig=nint(sig)
|
|
|
|
if(nlines.le.maxlines-1) nlines = nlines + 1
|
|
write(line(nlines),1020) cfile6,isync,nsig,t2,ndf0,nfdot,csync,msg(1:28), &
|
|
msglen,nworst,navg,tana,char(0)
|
|
1020 format(a6,2i4,f5.1,i5,i4,1x,a1,2x,a28,i4,2i3,f5.1,a1)
|
|
|
|
return
|
|
end subroutine iscat
|