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https://github.com/saitohirga/WSJT-X.git
synced 2025-04-04 10:28:33 -04:00
Some cleanup to genmsk144.f90 and commented out debug statements for loopback test on OS X.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6713 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Steven Franke
parent
2e7910fdfa
commit
968705cb9c
@ -53,8 +53,9 @@ subroutine genmsk144(msg0,ichk,msgsent,i4tone,itype)
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if( first ) then
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first=.false.
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nsym=128
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pchk_file="peg-128-80-reg3.pchk"
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gen_file="peg-128-80-reg3.gen"
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!! Fix this
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pchk_file="/Users/sfranke/Builds/wsjtx_install/peg-128-80-reg3.pchk"
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gen_file="/Users/sfranke/Builds/wsjtx_install/peg-128-80-reg3.gen"
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call init_ldpc(trim(pchk_file)//char(0),trim(gen_file)//char(0))
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pi=4.*atan(1.0)
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twopi=8.*atan(1.0)
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@ -124,13 +125,10 @@ subroutine genmsk144(msg0,ichk,msgsent,i4tone,itype)
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enddo
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call ldpc_encode(msgbits,codeword)
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write(*,*) 'codeword',codeword
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j=0
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do i=1,nsym/2 !Reorder the encoded bits
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j=j+1
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reorderedcodeword(j)=codeword(2*i-1)
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reorderedcodeword(j+nsym/2)=codeword(2*i)
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enddo
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! Reorder the bits.
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reorderedcodeword(1:64)=codeword(1:127:2)
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reorderedcodeword(65:128)=codeword(2:128:2)
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!Create 144-bit channel vector:
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!8-bit sync word + 48 bits + 8-bit sync word + 80 bits
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@ -146,19 +144,12 @@ write(*,*) 'codeword',codeword
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is=(i-1)*12+7
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xq(is:is+11)=bitseq(2*i+1)*pp
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enddo
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xq(864-5:864)=bitseq(1)*pp(1:6) !first half of last zero bit on q channel
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xq(864-5:864)=bitseq(1)*pp(1:6) !last half symbol
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do i=1,72
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is=(i-1)*12+1
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xi(is:is+11)=bitseq(2*i)*pp
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enddo
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! dphi=2*pi*1500/12000.0;
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! phi=0.0
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! do i=1,864
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! waveform(i)=imag(complex(xi(i),xq(i))*complex(cos(phi),sin(phi)))
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! phi=mod(phi+dphi,twopi)
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! enddo
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! Map I and Q to tones.
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i4tone=0
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do i=1,72
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@ -167,14 +158,8 @@ write(*,*) 'codeword',codeword
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enddo
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endif
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! Had to flip the polarity - not sure if this will be needed when we are
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! sending the tone to Modulator.cpp.
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! Flip polarity
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i4tone=-i4tone+1
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! print*,"transmitted tones"
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! do i=1,144
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! print*,i,bitseq(i),i4tone(i)
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! enddo
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999 return
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end subroutine genmsk144
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@ -1,10 +1,10 @@
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subroutine jtmsk_decode(id2,narg,line)
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! Decoder for JTMSK mode
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! Calls the experimental decoder for JTMSK 72ms ldpc messages
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parameter (NMAX=30*12000)
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parameter (NFFTMAX=512*1024)
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parameter (NSPM=1404) !Samples per JTMSK long message
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parameter (NSPM=864) !Samples per JTMSK long message
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integer*2 id2(0:NMAX) !Raw i*2 data, up to T/R = 30 s
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integer hist(0:32868)
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real d(0:NMAX) !Raw r*4 data
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@ -54,58 +54,58 @@ subroutine jtmsk_decode(id2,narg,line)
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!### Would it be better to set median rms to 1.0 ?
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! d(0:npts-1)=d(0:npts-1)/rms !Normalize so that rms=1.0
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call mskdt(d,npts,ty,yellow,nyel)
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! do i=1,nyel
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! print*,i,ty(i),yellow(i)
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! enddo
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nyel=min(nyel,5)
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n=log(float(npts))/log(2.0) + 1.0
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nfft=min(2**n,1024*1024)
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call analytic(d,npts,nfft,c) !Convert to analytic signal and filter
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nbefore=NSPM
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nafter=4*NSPM
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nafter=NSPM
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! Process ping list (sorted by S/N) from top down.
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! do n=1,nyel
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do n=1,nyel
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ia=ty(n)*12000.0 - nbefore
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ia=ty(n)*12000.0 - NSPM/2
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if(ia.lt.1) ia=1
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ib=ia + nafter
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ib=ia + 2*nafter-1
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if(ib.gt.NFFTMAX) ib=NFFTMAX
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iz=ib-ia+1
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cdat2(1:iz)=c(ia:ib) !Select nlen complex samples
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! write(*,*) ty(1),ia,ib,iz
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ja=ia/NSPM + 1
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jb=ib/NSPM
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t0=ia/12000.0
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do itry=1,21
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! do itry=1,21
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do itry=1,1
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idf1=(itry/2) * 50
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if(mod(itry,2).eq.1) idf1=-idf1
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if(abs(idf1).gt.ntol) exit
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fpk=idf1 + nrxfreq
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call tweak1(cdat2,iz,1500.0-fpk,cdat)
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call syncmsk(cdat,iz,jpk,ipk,idf,rmax,snr,metric,msg)
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call syncmsk144(cdat,iz,jpk,ipk,idf,rmax,snr,metric,msg,freq)
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if(metric.eq.-9999) cycle !No output if no significant sync
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if(msg(1:1).eq.' ') call jtmsk_short(cdat,iz,narg,tbest,idfpk,msg)
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if(msg(1:1).eq.'<' .and. naggressive.eq.0 .and. &
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narg(13)/8.ne.narg(12)) msg=' '
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if(msg(1:1).ne.' ') then
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if(msg.ne.msg0) then
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! if(msg.ne.msg0) then
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nline=nline+1
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nsnr0=-99
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endif
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freq=fpk+idf
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! endif
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t0=(ia+jpk)/12000.0
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y=10.0**(0.1*(yellow(n)-1.5))
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nsnr=max(-5,nint(db(y)))
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if(nsnr.gt.nsnr0 .and. nline.gt.0) then
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call rectify_msk(cdat2(jpk:jpk+NSPM-1),msg,narg(13),freq2)
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freq=freq2
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if(msg(1:1).eq.'<') freq=freq2+idfpk
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!### Check freq values !!!
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! if(nsnr.gt.nsnr0 .and. nline.gt.0) then
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write(line(nline),1020) nutc,nsnr,t0,nint(freq),msg
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1020 format(i6.6,i4,f5.1,i5,' & ',a22)
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1020 format(i6.6,i4,f5.1,i5,' & ',a22)
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nsnr0=nsnr
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go to 900
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endif
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! go to 900
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! endif
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msg0=msg
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if(nline.ge.maxlines) go to 900
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! if(nline.ge.maxlines) go to 900
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endif
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enddo
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! print*,'c',nutc,n,nint(yellow(n)-4.0),freq,freq2
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@ -86,7 +86,6 @@ subroutine jtmsk_decode(id2,narg,line)
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fpk=idf1 + nrxfreq
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call tweak1(cdat2,iz,1500.0-fpk,cdat)
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call syncmsk144(cdat,iz,jpk,ipk,idf,rmax,snr,metric,msg,freq)
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print*,'returned message :',msg
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if(metric.eq.-9999) cycle !No output if no significant sync
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if(msg(1:1).eq.' ') call jtmsk_short(cdat,iz,narg,tbest,idfpk,msg)
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if(msg(1:1).eq.'<' .and. naggressive.eq.0 .and. &
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@ -109,11 +108,11 @@ print*,'returned message :',msg
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! if(nline.ge.maxlines) go to 900
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endif
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enddo
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print*,'c',nutc,n,nint(yellow(n)-4.0),freq,freq2
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! print*,'c',nutc,n,nint(yellow(n)-4.0),freq,freq2
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enddo
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900 continue
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print*,'d',nutc,n,nint(yellow(n)-4.0),freq,freq2
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! print*,'d',nutc,n,nint(yellow(n)-4.0),freq,freq2
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if(line(1)(1:6).eq.' ') line(1)(1:1)=char(0)
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return
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@ -43,12 +43,13 @@ subroutine syncmsk144(cdat,npts,jpk,ipk,idf,rmax,snr,metric,msgreceived,fest)
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data s8/0,1,1,1,0,0,1,0/
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save first,cb,cd,pi,twopi,dt,f0,f1
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open(unit=78,file="/Users/sfranke/Builds/wsjtx_install/sfdebug.txt")
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if(first) then
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print*,"Initializing ldpc."
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pchk_file="peg-128-80-reg3.pchk"
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gen_file="peg-128-80-reg3.gen"
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write(78,*) "Initializing ldpc."
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pchk_file="/Users/sfranke/Builds/wsjtx_install/peg-128-80-reg3.pchk"
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gen_file="/Users/sfranke/Builds/wsjtx_install/peg-128-80-reg3.gen"
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call init_ldpc(trim(pchk_file)//char(0),trim(gen_file)//char(0))
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write(78,*) "after init_ldpc"
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! define half-sine pulse and raised-cosine edge window
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pi=4d0*datan(1d0)
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twopi=8d0*datan(1d0)
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@ -70,11 +71,7 @@ subroutine syncmsk144(cdat,npts,jpk,ipk,idf,rmax,snr,metric,msgreceived,fest)
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cbi(25:36)=pp*s8(6)
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cbi(37:42)=pp(1:6)*s8(8)
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cb=cmplx(cbi,cbq)
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! print*,"cb"
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! do i=1,42
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! print*,i,cbi(i),cbq(i)
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! enddo
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first=.false.
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endif
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@ -112,9 +109,10 @@ subroutine syncmsk144(cdat,npts,jpk,ipk,idf,rmax,snr,metric,msgreceived,fest)
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q1=200*al/(tot-tonespec(ilpk))
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endif
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fdiff=(ihpk-ilpk)*df
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write(*,*) "Coarse frequency error: ",ferr
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write(*,*) "Tone / avg : ",q1
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write(*,*) "Tone separation : ",fdiff
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! write(78,*) "Coarse frequency error: ",ferr
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! write(78,*) "Tone / avg : ",q1
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! write(78,*) "Tone separation : ",fdiff
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! remove coarse freq error - should now be within a few Hz
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call tweak1(cdat,npts,-(1500+ferr),cdat)
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@ -135,25 +133,23 @@ subroutine syncmsk144(cdat,npts,jpk,ipk,idf,rmax,snr,metric,msgreceived,fest)
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iloc=maxloc(dd)
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ic2=iloc(1)
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write(*,*) "Syncs: ic1,ic2 ",ic1,ic2
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! write(78,*) "Syncs: ic1,ic2 ",ic1,ic2
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ic=ic2
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! open(unit=78,file="blah.txt")
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! do i=1,npts-448-41
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! write(78,*) i,abs(cc1(i)),abs(cc2(i)),abs(cc(i)),dd(i),abs(cc3(i))
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! enddo
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! close(78)
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cca=sum(cdat(ic:ic+41)*conjg(cb))
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ccb=sum(cdat(ic+56*6:ic+56*6+41)*conjg(cb))
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phase0=atan2(imag(cca+ccb),real(cca+ccb))
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cfac=ccb*conjg(cca)
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ferr2=atan2(imag(cfac),real(cfac))/(twopi*56*6*dt)
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write(*,*) "Fine frequency error: ",ferr2
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write(*,*) "Coarse Carrier phase : ",phase0
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write(78,*) "Fine frequency error: ",ferr2
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write(78,*) "Coarse Carrier phase : ",phase0
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fest=1500+ferr+ferr2
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write(*,*) "Estimated f0 : ",fest
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write(78,*) "Estimated f0 : ",fest
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! Remove fine frequency error
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call tweak1(cdat,npts,-ferr2,cdat)
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@ -164,22 +160,18 @@ subroutine syncmsk144(cdat,npts,jpk,ipk,idf,rmax,snr,metric,msgreceived,fest)
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cfac=ccb*conjg(cca)
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ffin=atan2(imag(cfac),real(cfac))/(twopi*56*6*dt)
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phase0=atan2(imag(cca+ccb),real(cca+ccb))
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write(*,*) "Final freq error: ",ffin
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write(78,*) "Final freq error: ",ffin
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cfac=cmplx(cos(phase0),sin(phase0))
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cdat=cdat*conjg(cfac)
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open(unit=79,file="cdat.txt")
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write(*,*) "npts = ",npts
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do i=1,864
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ii=ic+i-1
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if( ii .gt. npts ) then
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ii=ii-864
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endif
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c(i)=cdat(ii)
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write(79,*) i,real(c(i)),imag(c(i))
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enddo
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close(79)
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do i=1,72
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softbits(2*i-1)=imag(c(1+(i-1)*12))
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softbits(2*i)=real(c(7+(i-1)*12))
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@ -190,8 +182,8 @@ subroutine syncmsk144(cdat,npts,jpk,ipk,idf,rmax,snr,metric,msgreceived,fest)
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hardbits(i)=1
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endif
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enddo
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! write(*,*) hardbits(1:8)
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! write(*,*) hardbits(57:57+7)
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! write(78,*) hardbits(1:8)
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! write(78,*) hardbits(57:57+7)
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hardword(1:48)=hardbits(9:9+47)
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hardword(49:128)=hardbits(65:65+80-1)
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@ -213,7 +205,7 @@ subroutine syncmsk144(cdat,npts,jpk,ipk,idf,rmax,snr,metric,msgreceived,fest)
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max_iterations=20
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max_dither=100
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call ldpc_decode(unscrambledsoftbits, decoded, max_iterations, niterations, max_dither, ndither)
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write(*,*) 'Decoder used ',niterations,' and ',ndither,' dither trials.'
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write(78,*) 'Decoder used ',niterations,'iterations and ',ndither,' dither trials.'
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if( niterations .lt. 0 ) then
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msgreceived=' '
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@ -236,7 +228,6 @@ subroutine syncmsk144(cdat,npts,jpk,ipk,idf,rmax,snr,metric,msgreceived,fest)
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! Compare calculated hash with received byte 10 - if they agree, keep the message.
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i1hashdec=ihashdec
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write(*,*) "Hashes",i1hashdec,i1Dec8BitBytes(10)
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if( i1hashdec .eq. i1Dec8BitBytes(10) ) then
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! Good hash --- unpack 72-bit message
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@ -249,7 +240,7 @@ subroutine syncmsk144(cdat,npts,jpk,ipk,idf,rmax,snr,metric,msgreceived,fest)
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enddo
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call unpackmsg(i4Dec6BitWords,msgreceived)
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endif
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close(78)
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return
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end subroutine syncmsk144
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