mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-05 00:41:19 -05:00
67 lines
1.6 KiB
Fortran
67 lines
1.6 KiB
Fortran
subroutine genmsk40(msg,msgsent,ichk,itone,itype)
|
|
|
|
use hashing
|
|
character*37 msg,msgsent,hashmsg
|
|
character*4 crpt,rpt(0:15)
|
|
logical first
|
|
integer*4 itone(144)
|
|
integer*1 message(16),codeword(32),bitseq(40)
|
|
integer*1 s8r(8)
|
|
data s8r/1,0,1,1,0,0,0,1/ ! Sync word is reversed wrt msk144 sync word.
|
|
data first/.true./
|
|
data rpt/"-03 ","+00 ","+03 ","+06 ","+10 ","+13 ","+16 ", &
|
|
"R-03","R+00","R+03","R+06","R+10","R+13","R+16", &
|
|
"RRR ","73 "/
|
|
save first,rpt
|
|
|
|
itype=-1
|
|
msgsent='*** bad message ***'
|
|
itone=0
|
|
i1=index(msg,'>')
|
|
if(i1.lt.9) go to 900
|
|
call fmtmsg(msg,iz)
|
|
crpt=msg(i1+2:i1+5)
|
|
do i=0,15
|
|
if(crpt.eq.rpt(i)) go to 10
|
|
enddo
|
|
go to 900
|
|
|
|
10 irpt=i !Report index, 0-15
|
|
if(ichk.lt.10000) then
|
|
hashmsg=msg(2:i1-1)
|
|
call hash(hashmsg,37,ihash)
|
|
ihash=iand(ihash,4095) !12-bit hash
|
|
ig=16*ihash + irpt !4-bit report
|
|
else
|
|
ig=ichk-10000
|
|
endif
|
|
|
|
do i=1,16
|
|
message(i)=iand(1,ishft(ig,1-i))
|
|
enddo
|
|
|
|
call encode_msk40(message,codeword)
|
|
! write(*,'(a6,i6,2x,a6,i6,2x,a6,i6)') ' msg: ',ig,'rprt: ',irpt,'hash: ',ihash
|
|
! write(*,'(a6,32i1)') ' cw: ',codeword
|
|
|
|
bitseq(1:8)=s8r
|
|
bitseq(9:40)=codeword
|
|
bitseq=2*bitseq-1
|
|
|
|
! Map I and Q to tones.
|
|
itone=0
|
|
do i=1, 20
|
|
itone(2*i-1)=(bitseq(2*i)*bitseq(2*i-1)+1)/2;
|
|
itone(2*i)=-(bitseq(2*i)*bitseq(mod(2*i,40)+1)-1)/2;
|
|
enddo
|
|
|
|
! Flip polarity
|
|
itone=-itone+1
|
|
|
|
msgsent=msg
|
|
itype=7
|
|
|
|
900 return
|
|
end subroutine genmsk40
|
|
|