mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2025-10-30 20:40:28 -04:00
413 lines
12 KiB
Fortran
413 lines
12 KiB
Fortran
module jt4_decode
|
|
type :: jt4_decoder
|
|
procedure(jt4_decode_callback), pointer :: decode_callback => null ()
|
|
procedure(jt4_average_callback), pointer :: average_callback => null ()
|
|
contains
|
|
procedure :: decode
|
|
procedure, private :: wsjt4, avg4
|
|
end type jt4_decoder
|
|
|
|
! Callback function to be called with each decode
|
|
abstract interface
|
|
subroutine jt4_decode_callback (this, snr, dt, freq, have_sync, &
|
|
sync, is_deep, decoded, qual, ich, is_average, ave)
|
|
import jt4_decoder
|
|
implicit none
|
|
class(jt4_decoder), intent(inout) :: this
|
|
integer, intent(in) :: snr
|
|
real, intent(in) :: dt
|
|
integer, intent(in) :: freq
|
|
logical, intent(in) :: have_sync
|
|
logical, intent(in) :: is_deep
|
|
character(len=1), intent(in) :: sync
|
|
character(len=22), intent(in) :: decoded
|
|
real, intent(in) :: qual
|
|
integer, intent(in) :: ich
|
|
logical, intent(in) :: is_average
|
|
integer, intent(in) :: ave
|
|
end subroutine jt4_decode_callback
|
|
end interface
|
|
|
|
! Callback function to be called with each average result
|
|
abstract interface
|
|
subroutine jt4_average_callback (this, used, utc, sync, dt, freq, flip)
|
|
import jt4_decoder
|
|
implicit none
|
|
class(jt4_decoder), intent(inout) :: this
|
|
logical, intent(in) :: used
|
|
integer, intent(in) :: utc
|
|
real, intent(in) :: sync
|
|
real, intent(in) :: dt
|
|
integer, intent(in) :: freq
|
|
logical, intent(in) :: flip
|
|
end subroutine jt4_average_callback
|
|
end interface
|
|
|
|
contains
|
|
|
|
subroutine decode(this,decode_callback,dd,jz,nutc,nfqso,ntol0,emedelay, &
|
|
dttol,nagain,ndepth,nclearave,minsync,minw,nsubmode,mycall,hiscall, &
|
|
hisgrid,nlist0,listutc0,average_callback)
|
|
|
|
use jt4
|
|
use timer_module, only: timer
|
|
|
|
class(jt4_decoder), intent(inout) :: this
|
|
procedure(jt4_decode_callback) :: decode_callback
|
|
integer, intent(in) :: jz,nutc,nfqso,ntol0,ndepth,minsync,minw,nsubmode, &
|
|
nlist0,listutc0(10)
|
|
real, intent(in) :: dd(jz),emedelay,dttol
|
|
logical, intent(in) :: nagain, nclearave
|
|
character(len=12), intent(in) :: mycall,hiscall
|
|
character(len=6), intent(in) :: hisgrid
|
|
procedure(jt4_average_callback), optional :: average_callback
|
|
|
|
real*4 dat(30*11025)
|
|
character*6 cfile6
|
|
|
|
this%decode_callback => decode_callback
|
|
if (present (average_callback)) then
|
|
this%average_callback => average_callback
|
|
end if
|
|
mode4=nch(nsubmode+1)
|
|
ntol=ntol0
|
|
neme=0
|
|
lumsg=6 !### temp ? ###
|
|
ndiag=1
|
|
nlist=nlist0
|
|
listutc=listutc0
|
|
|
|
! Lowpass filter and decimate by 2
|
|
call timer('lpf1 ',0)
|
|
call lpf1(dd,jz,dat,jz2)
|
|
call timer('lpf1 ',1)
|
|
|
|
write(cfile6(1:4),1000) nutc
|
|
1000 format(i4.4)
|
|
cfile6(5:6)=' '
|
|
|
|
call timer('wsjt4 ',0)
|
|
call this%wsjt4(dat,jz2,nutc,NClearAve,minsync,ntol,emedelay,dttol,mode4, &
|
|
minw,mycall,hiscall,hisgrid,nfqso,NAgain,ndepth,neme)
|
|
call timer('wsjt4 ',1)
|
|
|
|
return
|
|
end subroutine decode
|
|
|
|
subroutine wsjt4(this,dat,npts,nutc,NClearAve,minsync,ntol,emedelay,dttol, &
|
|
mode4,minw,mycall,hiscall,hisgrid,nfqso,NAgain,ndepth,neme)
|
|
|
|
! Orchestrates the process of decoding JT4 messages. Note that JT4
|
|
! always operates as if in "Single Decode" mode; it looks for only one
|
|
! decodable signal in the FTol range.
|
|
|
|
use jt4
|
|
use timer_module, only: timer
|
|
|
|
class(jt4_decoder), intent(inout) :: this
|
|
integer, intent(in) :: npts,nutc,minsync,ntol,mode4,minw, &
|
|
nfqso,ndepth,neme
|
|
logical, intent(in) :: NAgain,NClearAve
|
|
character(len=12), intent(in) :: mycall,hiscall
|
|
character(len=6), intent(in) :: hisgrid
|
|
real, intent(in) :: dat(npts) !Raw data
|
|
logical first,prtavg
|
|
character decoded*22,special*5
|
|
character*22 avemsg,deepmsg,deepave,blank,deepmsg0,deepave1
|
|
character csync*1
|
|
data first/.true./,nutc0/-999/,nfreq0/-999999/
|
|
save
|
|
|
|
if(first) then
|
|
nsave=0
|
|
first=.false.
|
|
blank=' '
|
|
! Silence compiler warnings
|
|
if(dttol.eq.-99.0 .and. emedelay.eq.-99.0 .and. nagain) stop
|
|
endif
|
|
|
|
zz=0.
|
|
! syncmin=3.0 + minsync
|
|
syncmin=1.0+minsync
|
|
naggressive=0
|
|
if(ndepth.ge.2) naggressive=1
|
|
nq1=3
|
|
nq2=6
|
|
if(naggressive.eq.1) nq1=1
|
|
if(NClearAve) then
|
|
nsave=0
|
|
iutc=-1
|
|
nfsave=0.
|
|
listutc=0
|
|
ppsave=0.
|
|
rsymbol=0.
|
|
dtsave=0.
|
|
syncsave=0.
|
|
nfanoave=0
|
|
ndeepave=0
|
|
endif
|
|
|
|
! Attempt to synchronize: look for sync pattern, get DF and DT.
|
|
call timer('sync4 ',0)
|
|
call sync4(dat,npts,ntol,nfqso,4,mode4,minw+1,dtx,dfx, &
|
|
snrx,snrsync,flip,width)
|
|
sync=snrsync
|
|
dtxz=dtx-0.8
|
|
nfreqz=nint(dfx)
|
|
call timer('sync4 ',1)
|
|
|
|
nsnr=-26
|
|
if(sync.lt.syncmin) then
|
|
if (associated (this%decode_callback)) then
|
|
call this%decode_callback(nsnr,dtxz,nfreqz,.false.,csync, &
|
|
.false.,decoded,0.,ich,.false.,0)
|
|
end if
|
|
go to 990
|
|
endif
|
|
|
|
! We have achieved sync
|
|
nsnr=nint(snrsync - 22.9)
|
|
decoded=blank
|
|
deepmsg=blank
|
|
special=' '
|
|
nsync=sync
|
|
nsnrlim=-33
|
|
csync='*'
|
|
if(flip.lt.0.0) csync='#'
|
|
qbest=0.
|
|
qabest=0.
|
|
prtavg=.false.
|
|
|
|
do idt=-2,2
|
|
dtx=dtxz + 0.03*idt
|
|
nfreq=nfreqz + 2*idf
|
|
|
|
! Attempt a single-sequence decode, including deep4 if Fano fails.
|
|
call timer('decode4 ',0)
|
|
call decode4(dat,npts,dtx,nfreq,flip,mode4,ndepth,neme,minw, &
|
|
mycall,hiscall,hisgrid,decoded,nfano,deepmsg,qual,ich)
|
|
call timer('decode4 ',1)
|
|
|
|
if(nfano.gt.0) then
|
|
! Fano succeeded: report the message and return !Fano OK
|
|
if (associated (this%decode_callback)) then
|
|
call this%decode_callback(nsnr,dtx,nfreq,.true.,csync, &
|
|
.false.,decoded,99.,ich,.false.,0)
|
|
end if
|
|
!### nsave=0
|
|
go to 990
|
|
|
|
else !Fano failed
|
|
if(qual.gt.qbest) then
|
|
dtx0=dtx
|
|
nfreq0=nfreq
|
|
deepmsg0=deepmsg
|
|
ich0=ich
|
|
qbest=qual
|
|
endif
|
|
endif
|
|
|
|
if(idt.ne.0) cycle
|
|
! Single-sequence Fano decode failed, so try for an average Fano decode:
|
|
qave=0.
|
|
! If we're doing averaging, call avg4
|
|
if(iand(ndepth,16).eq.16 .and. (.not.prtavg)) then
|
|
if(nutc.ne.nutc0 .or. abs(nfreq-nfreq0).gt.ntol) then
|
|
! This is a new minute or a new frequency, so call avg4.
|
|
nutc0=nutc !Try decoding average
|
|
nfreq0=nfreq
|
|
nsave=nsave+1
|
|
nsave=mod(nsave-1,64)+1
|
|
call timer('avg4 ',0)
|
|
call this%avg4(nutc,sync,dtx,flip,nfreq,mode4,ntol,ndepth,neme, &
|
|
mycall,hiscall,hisgrid,nfanoave,avemsg,qave,deepave,ich, &
|
|
ndeepave)
|
|
call timer('avg4 ',1)
|
|
endif
|
|
|
|
if(nfanoave.gt.0) then
|
|
! Fano succeeded: report the message AVG FANO OK
|
|
if (associated (this%decode_callback)) then
|
|
call this%decode_callback(nsnr,dtx,nfreq,.true.,csync, &
|
|
.false.,avemsg,99.,ich,.true.,nfanoave)
|
|
end if
|
|
prtavg=.true.
|
|
cycle
|
|
else
|
|
if(qave.gt.qabest) then
|
|
dtx1=dtx
|
|
nfreq1=nfreq
|
|
deepave1=deepave
|
|
ich1=ich
|
|
qabest=qave
|
|
endif
|
|
endif
|
|
endif
|
|
enddo
|
|
|
|
dtx=dtx0
|
|
nfreq=nfreq0
|
|
deepmsg=deepmsg0
|
|
ich=ich0
|
|
qual=qbest
|
|
|
|
if (associated (this%decode_callback)) then
|
|
if(int(qual).ge.nq1) then
|
|
call this%decode_callback(nsnr,dtx,nfreqz,.true.,csync,.true., &
|
|
deepmsg,qual,ich,.false.,0)
|
|
else
|
|
call this%decode_callback(nsnr,dtxz,nfreqz,.true.,csync, &
|
|
.false.,blank,0.,ich,.false.,0)
|
|
endif
|
|
end if
|
|
|
|
dtx=dtx1
|
|
nfreq=nfreq1
|
|
deepave=deepave1
|
|
ich=ich1
|
|
qave=qabest
|
|
|
|
if (associated (this%decode_callback) .and. ndeepave.ge.2) then
|
|
if(int(qave).ge.nq1) then
|
|
call this%decode_callback(nsnr,dtx,nfreq,.true.,csync,.true., &
|
|
deepave,qave,ich,.true.,ndeepave)
|
|
endif
|
|
end if
|
|
|
|
990 return
|
|
end subroutine wsjt4
|
|
|
|
subroutine avg4(this,nutc,snrsync,dtxx,flip,nfreq,mode4,ntol,ndepth,neme, &
|
|
mycall,hiscall,hisgrid,nfanoave,avemsg,qave,deepave,ichbest,ndeepave)
|
|
|
|
! Decodes averaged JT4 data
|
|
|
|
use jt4
|
|
class(jt4_decoder), intent(inout) :: this
|
|
|
|
character*22 avemsg,deepave,deepbest
|
|
character mycall*12,hiscall*12,hisgrid*6
|
|
character*1 csync,cused(64)
|
|
real sym(207,7)
|
|
integer iused(64)
|
|
logical first
|
|
data first/.true./
|
|
save
|
|
|
|
if(first) then
|
|
iutc=-1
|
|
nfsave=0
|
|
dtdiff=0.2
|
|
first=.false.
|
|
nsave=1 ! ### Should this be here? ###
|
|
endif
|
|
|
|
do i=1,64
|
|
if(nutc.eq.iutc(i) .and. abs(nfreq-nfsave(i)).le.ntol) go to 10
|
|
enddo
|
|
|
|
! Save data for message averaging
|
|
iutc(nsave)=nutc
|
|
syncsave(nsave)=snrsync
|
|
dtsave(nsave)=dtxx
|
|
nfsave(nsave)=nfreq
|
|
flipsave(nsave)=flip
|
|
ppsave(1:207,1:7,nsave)=rsymbol(1:207,1:7)
|
|
|
|
10 sym=0.
|
|
syncsum=0.
|
|
dtsum=0.
|
|
nfsum=0
|
|
nsum=0
|
|
|
|
do i=1,64
|
|
cused(i)='.'
|
|
if(iutc(i).lt.0) cycle
|
|
if(mod(iutc(i),2).ne.mod(nutc,2)) cycle !Use only same sequence
|
|
if(abs(dtxx-dtsave(i)).gt.dtdiff) cycle !DT must match
|
|
if(abs(nfreq-nfsave(i)).gt.ntol) cycle !Freq must match
|
|
if(flip.ne.flipsave(i)) cycle !Sync (*/#) must match
|
|
sym(1:207,1:7)=sym(1:207,1:7) + ppsave(1:207,1:7,i)
|
|
syncsum=syncsum + syncsave(i)
|
|
dtsum=dtsum + dtsave(i)
|
|
nfsum=nfsum + nfsave(i)
|
|
cused(i)='$'
|
|
nsum=nsum+1
|
|
iused(nsum)=i
|
|
enddo
|
|
if(nsum.lt.64) iused(nsum+1)=0
|
|
|
|
syncave=0.
|
|
dtave=0.
|
|
fave=0.
|
|
if(nsum.gt.0) then
|
|
sym=sym/nsum
|
|
syncave=syncsum/nsum
|
|
dtave=dtsum/nsum
|
|
fave=float(nfsum)/nsum
|
|
endif
|
|
|
|
do i=1,nsave
|
|
csync='*'
|
|
if(flipsave(i).lt.0.0) csync='#'
|
|
if (associated (this%average_callback)) then
|
|
call this%average_callback(cused(i) .eq. '$',iutc(i), &
|
|
syncsave(i),dtsave(i),nfsave(i),flipsave(i).lt.0.)
|
|
end if
|
|
enddo
|
|
|
|
sqt=0.
|
|
sqf=0.
|
|
do j=1,64
|
|
i=iused(j)
|
|
if(i.eq.0) exit
|
|
csync='*'
|
|
if(flipsave(i).lt.0.0) csync='#'
|
|
sqt=sqt + (dtsave(i)-dtave)**2
|
|
sqf=sqf + (nfsave(i)-fave)**2
|
|
enddo
|
|
rmst=0.
|
|
rmsf=0.
|
|
if(nsum.ge.2) then
|
|
rmst=sqrt(sqt/(nsum-1))
|
|
rmsf=sqrt(sqf/(nsum-1))
|
|
endif
|
|
kbest=ich1
|
|
do k=ich1,ich2
|
|
call extract4(sym(1,k),ncount,avemsg) !Do the Fano decode
|
|
nfanoave=0
|
|
if(ncount.ge.0) then
|
|
ichbest=k
|
|
nfanoave=nsum
|
|
go to 900
|
|
endif
|
|
if(nch(k).ge.mode4) exit
|
|
enddo
|
|
|
|
deepave=' '
|
|
qave=0.
|
|
|
|
! Possibly should pass nadd=nused, also ?
|
|
if(iand(ndepth,32).eq.32) then
|
|
flipx=1.0 !Normal flip not relevant for ave msg
|
|
qbest=0.
|
|
do k=ich1,ich2
|
|
call deep4(sym(2,k),neme,flipx,mycall,hiscall,hisgrid,deepave,qave)
|
|
if(qave.gt.qbest) then
|
|
qbest=qave
|
|
deepbest=deepave
|
|
kbest=k
|
|
ndeepave=nsum
|
|
endif
|
|
if(nch(k).ge.mode4) exit
|
|
enddo
|
|
|
|
deepave=deepbest
|
|
qave=qbest
|
|
ichbest=kbest
|
|
endif
|
|
|
|
900 return
|
|
end subroutine avg4
|
|
end module jt4_decode
|