84 lines
2.5 KiB
Plaintext
84 lines
2.5 KiB
Plaintext
subroutine gen65(msg0,ichk,msgsent,itone,itype)
|
|
|
|
! Encodes a JT65 message to yieild itone(1:126)
|
|
! Temporarily, does not implement EME shorthands
|
|
|
|
use packjt
|
|
character*22 msg0
|
|
character*22 message !Message to be generated
|
|
character*22 msgsent !Message as it will be received
|
|
integer itone(126)
|
|
character*3 cok !' ' or 'OOO'
|
|
integer dgen(13)
|
|
integer sent(63)
|
|
integer nprc(126)
|
|
data nprc/1,0,0,1,1,0,0,0,1,1,1,1,1,1,0,1,0,1,0,0, &
|
|
0,1,0,1,1,0,0,1,0,0,0,1,1,1,0,0,1,1,1,1, &
|
|
0,1,1,0,1,1,1,1,0,0,0,1,1,0,1,0,1,0,1,1, &
|
|
0,0,1,1,0,1,0,1,0,1,0,0,1,0,0,0,0,0,0,1, &
|
|
1,0,0,0,0,0,0,0,1,1,0,1,0,0,1,0,1,1,0,1, &
|
|
0,1,0,1,0,0,1,1,0,0,1,0,0,1,0,0,0,0,1,1, &
|
|
1,1,1,1,1,1/
|
|
save
|
|
|
|
if(msg0(1:1).eq.'@') then
|
|
read(msg0(2:5),*,end=1,err=1) nfreq
|
|
go to 2
|
|
1 nfreq=1000
|
|
2 itone(1)=nfreq
|
|
else
|
|
message=msg0
|
|
do i=1,22
|
|
if(ichar(message(i:i)).eq.0) then
|
|
message(i:)=' '
|
|
exit
|
|
endif
|
|
enddo
|
|
|
|
do i=1,22 !Strip leading blanks
|
|
if(message(1:1).ne.' ') exit
|
|
message=message(i+1:)
|
|
enddo
|
|
|
|
call chkmsg(message,cok,nspecial,flip)
|
|
ntest=0
|
|
if(flip.lt.0.0) ntest=1
|
|
if(nspecial.eq.0) then
|
|
call packmsg(message,dgen,itype) !Pack message into 72 bits
|
|
call unpackmsg(dgen,msgsent) !Unpack to get message sent
|
|
msgsent(20:22)=cok
|
|
call fmtmsg(msgsent,iz)
|
|
if(ichk.ne.0) go to 999 !Return if checking only
|
|
|
|
call rs_encode(dgen,sent) !Apply Reed-Solomon code
|
|
call interleave63(sent,1) !Apply interleaving
|
|
call graycode65(sent,63,1) !Apply Gray code
|
|
nsym=126 !Symbols per transmission
|
|
k=0
|
|
do j=1,nsym
|
|
if(nprc(j).eq.ntest) then
|
|
k=k+1
|
|
itone(j)=sent(k)+2
|
|
else
|
|
itone(j)=0
|
|
endif
|
|
enddo
|
|
else
|
|
nsym=32
|
|
k=0
|
|
do j=1,nsym
|
|
do n=1,4
|
|
k=k+1
|
|
if(iand(j,1).eq.1) itone(k)=0
|
|
if(iand(j,1).eq.0) itone(k)=10*nspecial
|
|
if(k.eq.126) go to 10
|
|
enddo
|
|
enddo
|
|
10 msgsent=message
|
|
itype=7
|
|
endif
|
|
endif
|
|
|
|
999 return
|
|
end subroutine gen65
|