subroutine hint65(s3,mrs,mrs2,mrsym,mr2sym,mrprob,mode65,flip, & mycall,hiscall0,hisgrid0,nexp_decode,qual,decoded) use packjt use prog_args parameter (NMAX=10000) real s3(64,63) integer*1 sym1(0:62,NMAX) integer*1 sym2(0:62,NMAX) integer mrs(63),mrs2(63) integer mrsym(0:62),mr2sym(0:62),mrprob(0:62) integer dgen(12),sym(0:62),sym_rev(0:62) ! integer test(0:62) character*6 mycall,hiscall0,hisgrid0,hiscall(NMAX) character*4 hisgrid(NMAX) character callsign*12,grid*4 character*180 line character ceme*3,msg*22 character*22 msg0(2*NMAX+100),decoded logical*1 eme(NMAX) logical first data first/.true./ save first,sym1,nused,msg0,sym2 if(first) then neme=0 open(23,file=trim(data_dir)//'/CALL3.TXT',status='unknown') icall=0 j=0 do i=1,NMAX read(23,1002,end=10) line 1002 format(a80) if(line(1:4).eq.'ZZZZ') cycle if(line(1:2).eq.'//') cycle i1=index(line,',') if(i1.lt.4) cycle i2=index(line(i1+1:),',') if(i2.lt.5) cycle i2=i2+i1 i3=index(line(i2+1:),',') if(i3.lt.1) i3=index(line(i2+1:),' ') i3=i2+i3 callsign=line(1:i1-1) grid=line(i1+1:i2-1) ceme=line(i2+1:i3-1) eme(i)=ceme.eq.'EME' if(neme.eq.1 .and. (.not.eme(i))) cycle j=j+1 hiscall(j)=callsign(1:6) !### Fix for compound callsigns! hisgrid(j)=grid enddo 10 ncalls=j close(23) ! NB: generation of test messages is not yet complete! j=0 do i=1,ncalls j=j+1 msg=mycall//' '//hiscall(i)//' '//hisgrid(i) ! if(isnr.ne.-20) write(msg(14:18),"(i3,' ')") isnr call fmtmsg(msg,iz) call packmsg(msg,dgen,itype) !Pack message into 72 bits call rs_encode(dgen,sym_rev) !RS encode sym(0:62)=sym_rev(62:0:-1) sym1(0:62,j)=sym call interleave63(sym_rev,1) !Interleave channel symbols call graycode(sym_rev,63,1,sym_rev) !Apply Gray code sym2(0:62,j)=sym_rev(0:62) msg0(j)=msg enddo nused=j first=.false. endif ref0=0. do j=1,63 ref0=ref0 + s3(mrs(j)+1,j) enddo u1=0. u1=-99.0 u2=u1 dtotal=199.0 ! Find u1 and u2 (best and second-best) codeword from a list, using ! a bank of matched filters on the symbol spectra s3(i,j). ipk=1 do k=1,nused if(k.ge.2 .and. k.le.64 .and. flip.lt.0.0) cycle ! Test all messages if flip=+1; skip the CQ messages if flip=-1. if(flip.gt.0.0 .or. msg0(k)(1:3).ne.'CQ ') then psum=0. ref=ref0 do j=1,63 i=sym2(j-1,k)+1 psum=psum + s3(i,j) if(i.eq.mrs(j)+1) ref=ref - s3(i,j) + s3(mrs2(j)+1,j) enddo p=psum/ref ! Find the FT-defined soft distance ! test=sym1(0:62,k) ! nh=0 ! ns=0 ! do i=0,62 ! j=62-i ! if(mrsym(j).ne.test(i)) then ! nh=nh+1 ! if(mr2sym(j).ne.test(i)) ns=ns+mrprob(j) ! endif ! enddo ! ds=ns*63.0/sum(mrprob) if(p.gt.u1) then u2=u1 u1=p ipk=k ! nhard=nh ! dsoft=ds ! dtotal=nh+ds ! ncandidates=0 ! ntry=0 endif endif enddo decoded=' ' qual=100.0*(u1-1.12*u2) qmin=1.0 if(qual.ge.qmin) decoded=msg0(ipk) return end subroutine hint65