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43 lines
1.1 KiB
Fortran
43 lines
1.1 KiB
Fortran
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subroutine genft8(msg,msgsent,itone)
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! Encode an FT8 message, producing array itone().
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use crc
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use packjt
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use hashing
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include 'ft8_params.f90'
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character*22 msg,msgsent
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character*84 cbits
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integer*4 i4Msg6BitWords(12) !72-bit message as 6-bit words
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integer*1 msgbits(KK),codeword(3*ND)
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integer itone(NN)
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integer icos7(0:6)
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data icos7/2,5,6,0,4,1,3/ !Costas 7x7 tone pattern
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call packmsg(msg,i4Msg6BitWords,itype) !Pack into 12 6-bit bytes
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call unpackmsg(i4Msg6BitWords,msgsent) !Unpack to get msgsent
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icrc=0 !### temporary ###
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write(cbits,1000) i4Msg6BitWords,icrc
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1000 format(12b6.6,b12.12)
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read(cbits,1002) msgbits
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1002 format(84i1)
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call encode168(msgbits,codeword) !Encode the test message
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! Message structure: S7 D28 S7 D28 S7
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itone(1:7)=icos7
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itone(35+1:35+7)=icos7
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itone(NN-6:NN)=icos7
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k=7
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do j=1,ND
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i=3*j -2
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k=k+1
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if(j.eq.29) k=k+7
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itone(k)=codeword(i)*4 + codeword(i+1)*2 + codeword(i+2)
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enddo
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return
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end subroutine genft8
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