subroutine extract(s3,nadd,mode65,ntrials,naggressive,ndepth,nflip, &
mycall_12,hiscall_12,hisgrid,nQSOProgress,ljt65apon, &
ncount,nhist,decoded,ltext,nft,qual)
! Input:
! s3 64-point spectra for each of 63 data symbols
! nadd number of spectra summed into s3
! nqd 0/1 to indicate decode attempt at QSO frequency
! Output:
! ncount number of symbols requiring correction (-1 for no KV decode)
! nhist maximum number of identical symbol values
! decoded decoded message (if ncount >=0)
! ltext true if decoded message is free text
! nft 0=no decode; 1=FT decode; 2=hinted decode
use prog_args !shm_key, exe_dir, data_dir
use packjt
use jt65_mod
use timer_module, only: timer
real s3(64,63)
character decoded*22, apmessage*22
character*12 mycall_12,hiscall_12
character*6 mycall,hiscall,hisgrid
character*6 mycall0,hiscall0,hisgrid0
integer apsymbols(7,12),ap(12)
integer nappasses(0:5) ! the number of decoding passes to use for each QSO state
integer naptypes(0:5,4) ! (nQSOProgress, decoding pass) maximum of 4 passes for now
integer dat4(12)
integer mrsym(63),mr2sym(63),mrprob(63),mr2prob(63)
integer correct(63),tmp(63)
logical first,ltext,ljt65apon
common/chansyms65/correct
data first/.true./
save
if(mode65.eq.-99) stop !Silence compiler warning
if(first) then
! aptype
!------------------------
! 1 CQ ??? ???
! 2 MyCall ??? ???
! 3 MyCall DxCall ???
! 4 MyCall DxCall RRR
! 5 MyCall DxCall 73
! 6 MyCall DxCall DxGrid
! 7 CQ DxCall DxGrid
apsymbols=-1
nappasses=(/3,4,2,3,3,4/)
naptypes(0,1:4)=(/1,2,6,0/) ! Tx6
naptypes(1,1:4)=(/2,3,6,7/) ! Tx1
naptypes(2,1:4)=(/2,3,0,0/) ! Tx2
naptypes(3,1:4)=(/3,4,5,0/) ! Tx3
naptypes(4,1:4)=(/3,4,5,0/) ! Tx4
naptypes(5,1:4)=(/2,3,4,5/) ! Tx5
first=.false.
endif
mycall=mycall_12(1:6)
hiscall=hiscall_12(1:6)
! Fill apsymbols array
if(ljt65apon .and. &
(mycall.ne.mycall0 .or. hiscall.ne.hiscall0 .or. hisgrid.ne.hisgrid0)) then
!write(*,*) 'initializing apsymbols '
apsymbols=-1
mycall0=mycall
hiscall0=hiscall
ap=-1
apsymbols(1,1:4)=(/62,32,32,49/) ! CQ
if(len_trim(mycall).gt.0) then
apmessage=mycall//" "//mycall//" RRR"
call packmsg(apmessage,ap,itype)
if(itype.ne.1) ap=-1
apsymbols(2,1:4)=ap(1:4)
!write(*,*) 'mycall symbols ',ap(1:4)
if(len_trim(hiscall).gt.0) then
apmessage=mycall//" "//hiscall//" RRR"
call packmsg(apmessage,ap,itype)
if(itype.ne.1) ap=-1
apsymbols(3,1:9)=ap(1:9)
apsymbols(4,:)=ap
apmessage=mycall//" "//hiscall//" 73"
call packmsg(apmessage,ap,itype)
if(itype.ne.1) ap=-1
apsymbols(5,:)=ap
if(len_trim(hisgrid(1:4)).gt.0) then
apmessage=mycall//' '//hiscall//' '//hisgrid(1:4)
call packmsg(apmessage,ap,itype)
if(itype.ne.1) ap=-1
apsymbols(6,:)=ap
apmessage='CQ'//' '//hiscall//' '//hisgrid(1:4)
call packmsg(apmessage,ap,itype)
if(itype.ne.1) ap=-1
apsymbols(7,:)=ap
endif
endif
endif
endif
qual=0.
nbirdie=20
npct=50
afac1=1.1
nft=0
nfail=0
decoded=' '
call pctile(s3,4032,npct,base)
s3=s3/base
s3a=s3 !###
! Get most reliable and second-most-reliable symbol values, and their
! probabilities
1 call demod64a(s3,nadd,afac1,mrsym,mrprob,mr2sym,mr2prob,ntest,nlow)
call chkhist(mrsym,nhist,ipk) !Test for birdies and QRM
if(nhist.ge.nbirdie) then
nfail=nfail+1
call pctile(s3,4032,npct,base)
s3(ipk,1:63)=base
if(nfail.gt.30) then
decoded=' '
ncount=-1
go to 900
endif
go to 1
endif
mrs=mrsym
mrs2=mr2sym
call graycode65(mrsym,63,-1) !Remove gray code
call interleave63(mrsym,-1) !Remove interleaving
call interleave63(mrprob,-1)
call graycode65(mr2sym,63,-1) !Remove gray code and interleaving
call interleave63(mr2sym,-1) !from second-most-reliable symbols
call interleave63(mr2prob,-1)
npass=1 ! if ap decoding is disabled
if(ljt65apon .and. len_trim(mycall).gt.0) then
npass=1+nappasses(nQSOProgress)
!write(*,*) 'ap is on: ',npass-1,'ap passes of types ',naptypes(nQSOProgress,:)
endif
do ipass=1,npass
ap=-1
ntype=0
if(ipass.gt.1) then
ntype=naptypes(nQSOProgress,ipass-1)
!write(*,*) 'ap pass, type ',ntype
ap=apsymbols(ntype,:)
if(count(ap.ge.0).eq.0) cycle ! don't bother if all ap symbols are -1
!write(*,'(12i3)') ap
endif
ntry=0
call timer('ftrsd ',0)
param=0
call ftrsdap(mrsym,mrprob,mr2sym,mr2prob,ap,ntrials,correct,param,ntry)
call timer('ftrsd ',1)
ncandidates=param(0)
nhard=param(1)
nsoft=param(2)
nerased=param(3)
rtt=0.001*param(4)
ntotal=param(5)
qual=0.001*param(7)
nd0=81
r0=0.87
if(naggressive.eq.10) then
nd0=83
r0=0.90
endif
if(ntotal.le.nd0 .and. rtt.le.r0) then
nft=1+ishft(ntype,2)
endif
if(nft.gt.0) exit
enddo
if(nft.eq.0 .and. iand(ndepth,32).eq.32) then
qmin=2.0 - 0.1*naggressive
call timer('hint65 ',0)
call hint65(s3,mrs,mrs2,nadd,nflip,mycall,hiscall,hisgrid,qual,decoded)
if(qual.ge.qmin) then
nft=2
ncount=0
else
decoded=' '
ntry=0
endif
call timer('hint65 ',1)
go to 900
endif
ncount=-1
decoded=' '
ltext=.false.
if(nft.gt.0) then
! Turn the corrected symbol array into channel symbols for subtraction;
! pass it back to jt65a via common block "chansyms65".
do i=1,12
dat4(i)=correct(13-i)
enddo
do i=1,63
tmp(i)=correct(64-i)
enddo
correct(1:63)=tmp(1:63)
call interleave63(correct,1)
call graycode65(correct,63,1)
call unpackmsg(dat4,decoded) !Unpack the user message
ncount=0
if(iand(dat4(10),8).ne.0) ltext=.true.
endif
900 continue
if(nft.eq.1 .and. nhard.lt.0) decoded=' '
return
end subroutine extract
subroutine getpp(workdat,p)
use jt65_mod
integer workdat(63)
integer a(63)
a(1:63)=workdat(63:1:-1)
call interleave63(a,1)
call graycode(a,63,1,a)
psum=0.
do j=1,63
i=a(j)+1
x=s3a(i,j)
s3a(i,j)=0.
psum=psum + x
s3a(i,j)=x
enddo
p=psum/63.0
return
end subroutine getpp