mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-25 05:38:46 -05:00
382 lines
14 KiB
Fortran
382 lines
14 KiB
Fortran
module q65_decode
|
|
|
|
integer nsnr0,nfreq0
|
|
real xdt0
|
|
character msg0*37,cq0*3
|
|
|
|
type :: q65_decoder
|
|
procedure(q65_decode_callback), pointer :: callback
|
|
contains
|
|
procedure :: decode
|
|
end type q65_decoder
|
|
|
|
abstract interface
|
|
subroutine q65_decode_callback (this,nutc,snr1,nsnr,dt,freq, &
|
|
decoded,idec,nused,ntrperiod)
|
|
import q65_decoder
|
|
implicit none
|
|
class(q65_decoder), intent(inout) :: this
|
|
integer, intent(in) :: nutc
|
|
real, intent(in) :: snr1
|
|
integer, intent(in) :: nsnr
|
|
real, intent(in) :: dt
|
|
real, intent(in) :: freq
|
|
character(len=37), intent(in) :: decoded
|
|
integer, intent(in) :: idec
|
|
integer, intent(in) :: nused
|
|
integer, intent(in) :: ntrperiod
|
|
end subroutine q65_decode_callback
|
|
end interface
|
|
|
|
contains
|
|
|
|
subroutine decode(this,callback,iwave,nqd0,nutc,ntrperiod,nsubmode,nfqso, &
|
|
ntol,ndepth,nfa0,nfb0,lclearave,single_decode,lagain,max_drift0, &
|
|
lnewdat0,emedelay,mycall,hiscall,hisgrid,nQSOprogress,ncontest, &
|
|
lapcqonly,navg0)
|
|
|
|
! Top-level routine that organizes the decoding of Q65 signals
|
|
! Input: iwave Raw data, i*2
|
|
! nutc UTC for time-tagging the decode
|
|
! ntrperiod T/R sequence length (s)
|
|
! nsubmode Tone-spacing indicator, 0-4 for A-E
|
|
! nfqso Target signal frequency (Hz)
|
|
! ntol Search range around nfqso (Hz)
|
|
! ndepth Optional decoding level
|
|
! lclearave Flag to clear the message-averaging arrays
|
|
! emedelay Sync search extended to cover EME delays
|
|
! nQSOprogress Auto-sequencing state for the present QSO
|
|
! ncontest Supported contest type
|
|
! lapcqonly Flag to use AP only for CQ calls
|
|
! Output: sent to the callback routine for display to user
|
|
|
|
use timer_module, only: timer
|
|
use packjt77
|
|
use, intrinsic :: iso_c_binding
|
|
use q65 !Shared variables
|
|
use prog_args
|
|
|
|
parameter (NMAX=300*12000) !Max TRperiod is 300 s
|
|
class(q65_decoder), intent(inout) :: this
|
|
procedure(q65_decode_callback) :: callback
|
|
character(len=12) :: mycall, hiscall !Used for AP decoding
|
|
character(len=6) :: hisgrid
|
|
character*37 decoded !Decoded message
|
|
character*77 c77
|
|
character*78 c78
|
|
character*6 cutc
|
|
character c6*6,c4*4,cmode*4
|
|
character*80 fmt
|
|
integer*2 iwave(NMAX) !Raw data
|
|
real, allocatable :: dd(:) !Raw data
|
|
integer dat4(13) !Decoded message as 12 6-bit integers
|
|
integer dgen(13)
|
|
logical lclearave,lnewdat0,lapcqonly,unpk77_success
|
|
logical single_decode,lagain
|
|
complex, allocatable :: c00(:) !Analytic signal, 6000 Sa/s
|
|
complex, allocatable :: c0(:) !Analytic signal, 6000 Sa/s
|
|
integer stageno !Added by W3SZ
|
|
stageno=0
|
|
|
|
! Start by setting some parameters and allocating storage for large arrays
|
|
call sec0(0,tdecode)
|
|
nfa=nfa0
|
|
nfb=nfb0
|
|
nqd=nqd0
|
|
lnewdat=lnewdat0
|
|
max_drift=max_drift0
|
|
idec=-1
|
|
idf=0
|
|
idt=0
|
|
nrc=-2
|
|
mode_q65=2**nsubmode
|
|
npts=ntrperiod*12000
|
|
nfft1=ntrperiod*12000
|
|
nfft2=ntrperiod*6000
|
|
npasses=1
|
|
if(lagain) ndepth=ior(ndepth,3) !Use 'Deep' for manual Q65 decodes
|
|
dxcall13=hiscall ! initialize for use in packjt77
|
|
mycall13=mycall
|
|
|
|
! Determine the T/R sequence: iseq=0 (even), or iseq=1 (odd)
|
|
n=nutc
|
|
if(ntrperiod.ge.60 .and. nutc.le.2359) n=100*n
|
|
write(cutc,'(i6.6)') n
|
|
read(cutc,'(3i2)') ih,im,is
|
|
nsec=3600*ih + 60*im + is
|
|
iseq=mod(nsec/ntrperiod,2)
|
|
|
|
if(lclearave) call q65_clravg
|
|
allocate(dd(npts))
|
|
allocate (c00(0:nfft1-1))
|
|
allocate (c0(0:nfft1-1))
|
|
|
|
if(lagain) then
|
|
call q65_hist(nfqso,dxcall=hiscall,dxgrid=hisgrid)
|
|
endif
|
|
|
|
nsps=1800
|
|
if(ntrperiod.eq.30) then
|
|
nsps=3600
|
|
else if(ntrperiod.eq.60) then
|
|
nsps=7200
|
|
else if(ntrperiod.eq.120) then
|
|
nsps=16000
|
|
else if(ntrperiod.eq.300) then
|
|
nsps=41472
|
|
endif
|
|
|
|
baud=12000.0/nsps
|
|
this%callback => callback
|
|
nFadingModel=1
|
|
maxiters=33
|
|
ibwa=max(1,int(1.8*log(baud*mode_q65)) + 1)
|
|
ibwb=min(10,ibwa+2)
|
|
if(iand(ndepth,3).ge.2) then
|
|
ibwa=max(1,int(1.8*log(baud*mode_q65)) + 1)
|
|
ibwb=min(10,ibwa+5)
|
|
maxiters=67
|
|
endif
|
|
if(iand(ndepth,3).eq.3) then
|
|
ibwa=max(1,ibwa-1)
|
|
ibwb=min(10,ibwb+1)
|
|
maxiters=100
|
|
endif
|
|
! Generate codewords for full-AP list decoding
|
|
if(ichar(hiscall(1:1)).eq.0) hiscall=' '
|
|
if(ichar(hisgrid(1:1)).eq.0) hisgrid=' '
|
|
ncw=0
|
|
if(nqd.eq.1 .or. lagain) then
|
|
call q65_set_list(mycall,hiscall,hisgrid,codewords,ncw)
|
|
endif
|
|
dgen=0
|
|
call q65_enc(dgen,codewords) !Initialize the Q65 codec
|
|
nused=1
|
|
iavg=0
|
|
|
|
! W3SZ patch: Initialize AP params here, rather than afer the call to ana64().
|
|
call ft8apset(mycall,hiscall,ncontest,apsym0,aph10) ! Generate ap symbols
|
|
where(apsym0.eq.-1) apsym0=0
|
|
npasses=2
|
|
if(nQSOprogress.eq.5) npasses=3
|
|
|
|
call timer('q65_dec0',0)
|
|
! Call top-level routine in q65 module: establish sync and try for a
|
|
! q3 or q0 decode.
|
|
call q65_dec0(iavg,nutc,iwave,ntrperiod,nfqso,ntol,ndepth,lclearave, &
|
|
emedelay,xdt,f0,snr1,width,dat4,snr2,idec,stageno)
|
|
call timer('q65_dec0',1)
|
|
! write(*,3001) '=a',sum(abs(float(iwave))),nfqso,ntol,ndepth,xdt,f0,idec
|
|
!3001 format(a2,f15.0,3i5,f7.2,f7.1,i5)
|
|
|
|
if(idec.ge.0) then
|
|
dtdec=xdt !We have a q3 or q0 decode at nfqso
|
|
f0dec=f0
|
|
go to 100
|
|
endif
|
|
|
|
! Prepare for a single-period decode with iaptype = 0, 1, 2, or 4
|
|
jpk0=(xdt+1.0)*6000 !Index of nominal start of signal
|
|
if(ntrperiod.le.30) jpk0=(xdt+0.5)*6000 !For shortest sequences
|
|
if(jpk0.lt.0) jpk0=0
|
|
call ana64(iwave,npts,c00) !Convert to complex c00() at 6000 Sa/s
|
|
if(lapcqonly) npasses=1
|
|
iaptype=0
|
|
do ipass=0,npasses !Loop over AP passes
|
|
apmask=0 !Try first with no AP information
|
|
apsymbols=0
|
|
if(ipass.ge.1) then
|
|
! Subsequent passes use AP information appropiate for nQSOprogress
|
|
call q65_ap(nQSOprogress,ipass,ncontest,lapcqonly,iaptype, &
|
|
apsym0,apmask1,apsymbols1)
|
|
write(c78,1050) apmask1
|
|
1050 format(78i1)
|
|
read(c78,1060) apmask
|
|
1060 format(13b6.6)
|
|
write(c78,1050) apsymbols1
|
|
read(c78,1060) apsymbols
|
|
endif
|
|
|
|
call timer('q65loops',0)
|
|
call q65_loops(c00,npts/2,nsps/2,nsubmode,ndepth,jpk0, &
|
|
xdt,f0,iaptype,xdt1,f1,snr2,dat4,idec)
|
|
call timer('q65loops',1)
|
|
if(idec.ge.0) then
|
|
dtdec=xdt1
|
|
f0dec=f1
|
|
go to 100 !Successful decode, we're done
|
|
endif
|
|
enddo ! ipass
|
|
|
|
if(iand(ndepth,16).eq.0 .or. navg(iseq).lt.2) go to 100
|
|
|
|
! There was no single-transmission decode. Try for an average 'q3n' decode.
|
|
50 call timer('list_avg',0)
|
|
! Call top-level routine in q65 module: establish sync and try for a q3
|
|
! decode, this time using the cumulative 's1a' symbol spectra.
|
|
iavg=1
|
|
call q65_dec0(iavg,nutc,iwave,ntrperiod,nfqso,ntol,ndepth,lclearave, &
|
|
emedelay,xdt,f0,snr1,width,dat4,snr2,idec,stageno)
|
|
call timer('list_avg',1)
|
|
|
|
if(idec.ge.0) then
|
|
dtdec=xdt !We have a list-decode result from averaged data
|
|
f0dec=f0
|
|
nused=navg(iseq)
|
|
go to 100
|
|
endif
|
|
|
|
! There was no 'q3n' decode. Try for a 'q[0124]n' decode.
|
|
! Call top-level routine in q65 module: establish sync and try for a q[012]n
|
|
! decode, this time using the cumulative 's1a' symbol spectra.
|
|
|
|
call timer('q65_avg ',0)
|
|
iavg=2
|
|
call q65_dec0(iavg,nutc,iwave,ntrperiod,nfqso,ntol,ndepth,lclearave, &
|
|
emedelay,xdt,f0,snr1,width,dat4,snr2,idec,stageno)
|
|
call timer('q65_avg ',1)
|
|
if(idec.ge.0) then
|
|
dtdec=xdt !We have a q[012]n result
|
|
f0dec=f0
|
|
nused=navg(iseq)
|
|
endif
|
|
|
|
100 if(idec.lt.0 .and. max_drift.eq.50) then
|
|
stageno = 5
|
|
call timer('q65_dec0',0)
|
|
! Call top-level routine in q65 module: establish sync and try for a
|
|
! q3 or q0 decode.
|
|
call q65_dec0(iavg,nutc,iwave,ntrperiod,nfqso,ntol,ndepth,lclearave, &
|
|
emedelay,xdt,f0,snr1,width,dat4,snr2,idec,stageno)
|
|
call timer('q65_dec0',1)
|
|
if(idec.ge.0) then
|
|
dtdec=xdt !We have a q[012]n result
|
|
f0dec=f0
|
|
endif
|
|
endif ! if(idec.lt.0)
|
|
|
|
decoded=' '
|
|
if(idec.ge.0) then
|
|
! idec Meaning
|
|
! ------------------------------------------------------
|
|
! -1: No decode
|
|
! 0: Decode without AP information
|
|
! 1: Decode with AP for "CQ ? ?"
|
|
! 2: Decode with AP for "MyCall ? ?"
|
|
! 3: Decode with AP for "MyCall DxCall ?"
|
|
|
|
! Unpack decoded message for display to user
|
|
write(c77,1000) dat4(1:12),dat4(13)/2
|
|
1000 format(12b6.6,b5.5)
|
|
call unpack77(c77,1,decoded,unpk77_success) !Unpack to get msgsent
|
|
call q65_snr(dat4,dtdec,f0dec,mode_q65,nused,snr2)
|
|
nsnr=nint(snr2)
|
|
call this%callback(nutc,snr1,nsnr,dtdec,f0dec,decoded, &
|
|
idec,nused,ntrperiod)
|
|
call q65_hist(nint(f0dec),msg0=decoded)
|
|
if(iand(ndepth,128).ne.0 .and. .not.lagain .and. &
|
|
int(abs(f0dec-nfqso)).le.ntol ) call q65_clravg !AutoClrAvg
|
|
call sec0(1,tdecode)
|
|
open(22,file=trim(data_dir)//'/q65_decodes.dat',status='unknown', &
|
|
position='append',iostat=ios)
|
|
if(ios.eq.0) then
|
|
! Save decoding parameters to q65_decoded.dat, for later analysis.
|
|
write(cmode,'(i3)') ntrperiod
|
|
cmode(4:4)=char(ichar('A')+nsubmode)
|
|
c6=hiscall(1:6)
|
|
if(c6.eq.' ') c6='<b> '
|
|
c4=hisgrid(1:4)
|
|
if(c4.eq.' ') c4='<b> '
|
|
fmt='(i6.4,1x,a4,4i2,6i3,i4,f6.2,f7.1,f6.1,f7.1,f6.2,'// &
|
|
'1x,a6,1x,a6,1x,a4,1x,a)'
|
|
if(ntrperiod.le.30) fmt(5:5)='6'
|
|
if(idec.eq.3) nrc=0
|
|
write(22,fmt) nutc,cmode,nQSOprogress,idec,idfbest,idtbest,ibw, &
|
|
ndistbest,nused,icand,ncand,nrc,ndepth,xdt,f0,snr2,plog, &
|
|
tdecode,mycall(1:6),c6,c4,trim(decoded)
|
|
close(22)
|
|
endif
|
|
endif
|
|
navg0=1000*navg(0) + navg(1)
|
|
if(single_decode .or. lagain) go to 900
|
|
|
|
do icand=1,ncand
|
|
! Prepare for single-period candidate decodes with iaptype = 0, 1, 2, or 4
|
|
snr1=candidates(icand,1)
|
|
xdt= candidates(icand,2)
|
|
f0 = candidates(icand,3)
|
|
jpk0=(xdt+1.0)*6000 !Index of nominal start of signal
|
|
if(ntrperiod.le.30) jpk0=(xdt+0.5)*6000 !For shortest sequences
|
|
if(jpk0.lt.0) jpk0=0
|
|
call ana64(iwave,npts,c00) !Convert to complex c00() at 6000 Sa/s
|
|
call ft8apset(mycall,hiscall,ncontest,apsym0,aph10) ! Generate ap symbols
|
|
where(apsym0.eq.-1) apsym0=0
|
|
|
|
npasses=2
|
|
if(nQSOprogress.eq.5) npasses=3
|
|
if(lapcqonly) npasses=1
|
|
iaptype=0
|
|
do ipass=0,npasses !Loop over AP passes
|
|
apmask=0 !Try first with no AP information
|
|
apsymbols=0
|
|
if(ipass.ge.1) then
|
|
! Subsequent passes use AP information appropiate for nQSOprogress
|
|
call q65_ap(nQSOprogress,ipass,ncontest,lapcqonly,iaptype, &
|
|
apsym0,apmask1,apsymbols1)
|
|
write(c78,1050) apmask1
|
|
read(c78,1060) apmask
|
|
write(c78,1050) apsymbols1
|
|
read(c78,1060) apsymbols
|
|
endif
|
|
|
|
call timer('q65loops',0)
|
|
call q65_loops(c00,npts/2,nsps/2,nsubmode,ndepth,jpk0, &
|
|
xdt,f0,iaptype,xdt1,f1,snr2,dat4,idec)
|
|
call timer('q65loops',1)
|
|
if(idec.ge.0) then
|
|
dtdec=xdt1
|
|
f0dec=f1
|
|
go to 200 !Successful decode, we're done
|
|
endif
|
|
enddo ! ipass
|
|
|
|
200 decoded=' '
|
|
if(idec.ge.0) then
|
|
! Unpack decoded message for display to user
|
|
write(c77,1000) dat4(1:12),dat4(13)/2
|
|
call unpack77(c77,1,decoded,unpk77_success) !Unpack to get msgsent
|
|
call q65_snr(dat4,dtdec,f0dec,mode_q65,nused,snr2)
|
|
nsnr=nint(snr2)
|
|
call this%callback(nutc,snr1,nsnr,dtdec,f0dec,decoded, &
|
|
idec,nused,ntrperiod)
|
|
call q65_hist(nint(f0dec),msg0=decoded)
|
|
if(iand(ndepth,128).ne.0 .and. .not.lagain .and. &
|
|
int(abs(f0dec-nfqso)).le.ntol ) call q65_clravg !AutoClrAvg
|
|
call sec0(1,tdecode)
|
|
open(22,file=trim(data_dir)//'/q65_decodes.dat',status='unknown', &
|
|
position='append',iostat=ios)
|
|
if(ios.eq.0) then
|
|
! Save decoding parameters to q65_decoded.dat, for later analysis.
|
|
write(cmode,'(i3)') ntrperiod
|
|
cmode(4:4)=char(ichar('A')+nsubmode)
|
|
c6=hiscall(1:6)
|
|
if(c6.eq.' ') c6='<b> '
|
|
c4=hisgrid(1:4)
|
|
if(c4.eq.' ') c4='<b> '
|
|
fmt='(i6.4,1x,a4,4i2,6i3,i4,f6.2,f7.1,f6.1,f7.1,f6.2,'// &
|
|
'1x,a6,1x,a6,1x,a4,1x,a)'
|
|
if(ntrperiod.le.30) fmt(5:5)='6'
|
|
if(idec.eq.3) nrc=0
|
|
write(22,fmt) nutc,cmode,nQSOprogress,idec,idfbest,idtbest,ibw, &
|
|
ndistbest,nused,icand,ncand,nrc,ndepth,xdt,f0,snr2,plog, &
|
|
tdecode,mycall(1:6),c6,c4,trim(decoded)
|
|
close(22)
|
|
endif
|
|
endif
|
|
enddo ! icand
|
|
if(iavg.eq.0 .and.navg(iseq).ge.2 .and. iand(ndepth,16).ne.0) go to 50
|
|
900 return
|
|
end subroutine decode
|
|
|
|
end module q65_decode
|