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https://github.com/saitohirga/WSJT-X.git
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124 lines
3.4 KiB
Fortran
124 lines
3.4 KiB
Fortran
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program JTMSKcode
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! Generate simulated data for testing of JTMSK
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use iso_c_binding, only: c_loc,c_size_t
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use hashing
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use packjt
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character msg*22,decoded*22,bad*1,msgtype*13
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integer*4 i4tone(234) !Channel symbols (values 0-1)
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integer*1 e1(201)
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integer*1 r1(201)
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integer*1, target :: d8(13)
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integer mettab(0:255,0:1) !Metric table for BPSK modulation
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integer*1 i1hash(4)
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integer*4 i4Msg6BitWords(12) !72-bit message as 6-bit words
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character*72 c72
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! real*8 twopi,dt,f0,f1,f,phi,dphi
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real xp(29)
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equivalence (ihash,i1hash)
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data xp/0.500000, 0.401241, 0.309897, 0.231832, 0.168095, &
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0.119704, 0.083523, 0.057387, 0.039215, 0.026890, &
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0.018084, 0.012184, 0.008196, 0.005475, 0.003808, &
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0.002481, 0.001710, 0.001052, 0.000789, 0.000469, &
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0.000329, 0.000225, 0.000187, 0.000086, 0.000063, &
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0.000017, 0.000091, 0.000032, 0.000045/
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include 'testmsg.f90'
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nargs=iargc()
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if(nargs.ne.1) then
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print*,'Usage: JTMSKcode "message"'
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! print*,' JTMSKcode -t'
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go to 999
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endif
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call getarg(1,msg)
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nmsg=1
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if(msg(1:2).eq."-t") nmsg=NTEST
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! Get the metric table
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bias=0.0
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scale=20.0
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xln2=log(2.0)
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do i=128,156
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x0=log(max(0.0001,2.0*xp(i-127)))/xln2
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x1=log(max(0.001,2.0*(1.0-xp(i-127))))/xln2
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mettab(i,0)=nint(scale*(x0-bias))
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mettab(i,1)=nint(scale*(x1-bias))
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mettab(256-i,0)=mettab(i,1)
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mettab(256-i,1)=mettab(i,0)
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enddo
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do i=157,255
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mettab(i,0)=mettab(156,0)
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mettab(i,1)=mettab(156,1)
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mettab(256-i,0)=mettab(i,1)
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mettab(256-i,1)=mettab(i,0)
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enddo
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write(*,1010)
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1010 format(" Message Decoded Err? Type"/ &
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74("-"))
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do imsg=1,nmsg
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if(nmsg.gt.1) msg=testmsg(imsg)
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call fmtmsg(msg,iz) !To upper case, collapse multiple blanks
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ichk=0
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call genmsk(msg,ichk,decoded,i4tone,itype) !Encode message into tone #s
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msgtype=""
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if(itype.eq.1) msgtype="Std Msg"
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if(itype.eq.2) msgtype="Type 1 prefix"
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if(itype.eq.3) msgtype="Type 1 suffix"
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if(itype.eq.4) msgtype="Type 2 prefix"
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if(itype.eq.5) msgtype="Type 2 suffix"
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if(itype.eq.6) msgtype="Free text"
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! Extract the data symbols, skipping over sync and parity bits
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n1=35
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n2=69
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n3=94
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r1(1:n1)=i4tone(11+1:11+n1)
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r1(n1+1:n1+n2)=i4tone(23+n1+1:23+n1+n2)
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r1(n1+n2+1:n1+n2+n3)=i4tone(35+n1+n2+1:35+n1+n2+n3)
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where(r1.eq.0) r1=127
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where(r1.eq.1) r1=-127
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j=0
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do i=1,99
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j=j+1
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e1(j)=r1(i)
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j=j+1
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e1(j)=r1(i+99)
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enddo
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nb1=87
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call vit213(e1,nb1,mettab,d8,metric)
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ihash=nhash(c_loc(d8),int(9,c_size_t),146)
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ihash=2*iand(ihash,32767)
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decoded=" "
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if(d8(10).eq.i1hash(2) .and. d8(11).eq.i1hash(1)) then
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write(c72,1012) d8(1:9)
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1012 format(9b8.8)
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read(c72,1014) i4Msg6BitWords
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1014 format(12b6.6)
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call unpackmsg(i4Msg6BitWords,decoded) !Unpack to get msgsent
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endif
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bad=" "
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if(decoded.ne.msg) bad="*"
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write(*,1020) imsg,msg,decoded,bad,itype,msgtype
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1020 format(i2,'.',2x,a22,2x,a22,3x,a1,i3,": ",a13)
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enddo
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if(nmsg.eq.1) then
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open(10,file='JTMSKcode.out',status='unknown')
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do j=1,234
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write(10,1030) j,i4tone(j)
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1030 format(2i5)
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enddo
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close(10)
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endif
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999 end program JTMSKcode
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