mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2025-10-30 20:40:28 -04:00
58 lines
1.8 KiB
FortranFixed
58 lines
1.8 KiB
FortranFixed
|
subroutine decode65(dat,npts,dtx,dfx,flip,ndepth,neme,nsked,
|
||
|
|
+ mycall,hiscall,hisgrid,mode65,lsave,ftrack,decoded,ncount,
|
||
|
|
+ deepmsg,qual)
|
||
|
|
|
||
|
|
C Decodes JT65 data, assuming that DT and DF have already been determined.
|
||
|
|
|
||
|
|
real dat(npts) !Raw data
|
||
|
|
real s2(77,126)
|
||
|
|
real s3(64,63)
|
||
|
|
real ftrack(126)
|
||
|
|
logical lsave
|
||
|
|
character decoded*22,deepmsg*22
|
||
|
|
character mycall*12,hiscall*12,hisgrid*6
|
||
|
|
include 'avecom.h'
|
||
|
|
include 'prcom.h'
|
||
|
|
save
|
||
|
|
|
||
|
|
dt=2.0/11025.0 !Sample interval (2x downsampled data)
|
||
|
|
istart=nint(dtx/dt) !Start index for synced FFTs
|
||
|
|
nsym=126
|
||
|
|
|
||
|
|
C Compute FFTs of symbols
|
||
|
|
f0=1270.46 + dfx
|
||
|
|
call spec2d65(dat,npts,nsym,flip,istart,f0,ftrack,mode65,s2)
|
||
|
|
|
||
|
|
do j=1,63
|
||
|
|
k=mdat(j) !Points to data symbol
|
||
|
|
if(flip.lt.0.0) k=mdat2(j)
|
||
|
|
do i=1,64
|
||
|
|
s3(i,j)=s2(i+7,k)
|
||
|
|
enddo
|
||
|
|
enddo
|
||
|
|
nadd=mode65
|
||
|
|
|
||
|
|
call extract(s3,nadd,ndepth,ncount,decoded) !Extract the message
|
||
|
|
c if(lsave) call deep65(s3,mode65,neme,nsked,flip,mycall,hiscall,hisgrid,
|
||
|
|
call deep65(s3,mode65,neme,nsked,flip,mycall,hiscall,hisgrid,
|
||
|
|
+ deepmsg,qual)
|
||
|
|
|
||
|
|
if(ncount.lt.0) decoded=' '
|
||
|
|
|
||
|
|
C Suppress "birdie messages":
|
||
|
|
if(decoded(1:7).eq.'000AAA ') decoded=' '
|
||
|
|
if(decoded(1:7).eq.'0L6MWK ') decoded=' '
|
||
|
|
|
||
|
|
C If ncount>=0 or if this is the "0,0" run, save spectrum in ppsave:
|
||
|
|
C Q: should ftrack be used here?
|
||
|
|
100 if((ncount.ge.0 .or. lsave)) then
|
||
|
|
do j=1,63
|
||
|
|
k=mdat(j)
|
||
|
|
if(flip.lt.0.0) k=mdat2(j)
|
||
|
|
call move(s2(8,k),ppsave(1,j,nsave),64)
|
||
|
|
enddo
|
||
|
|
endif
|
||
|
|
|
||
|
|
return
|
||
|
|
end
|