mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-03 16:01:18 -05:00
c4a1997191
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/map65@2464 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
94 lines
2.5 KiB
Fortran
94 lines
2.5 KiB
Fortran
subroutine gen65(message,mode65,samfac,nsendingsh,msgsent,iwave,nwave)
|
|
|
|
! Encodes a JT65 message into a wavefile.
|
|
! Executes in 17 ms on opti-745.
|
|
|
|
parameter (NMAX=60*11025) !Max length of wave file
|
|
character*22 message !Message to be generated
|
|
character*22 msgsent !Message as it will be received
|
|
character*3 cok !' ' or 'OOO'
|
|
real*8 dt,phi,f,f0,dfgen,dphi,twopi,samfac
|
|
integer*2 iwave(NMAX) !Generated wave file
|
|
integer dgen(12)
|
|
integer sent(63)
|
|
logical first
|
|
integer nprc(126)
|
|
real pr(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/
|
|
data twopi/6.283185307179586476d0/,first/.true./
|
|
save
|
|
|
|
if(first) then
|
|
do i=1,126
|
|
pr(i)=2*nprc(i)-1
|
|
enddo
|
|
first=.false.
|
|
endif
|
|
|
|
call chkmsg(message,cok,nspecial,flip)
|
|
if(nspecial.eq.0) then
|
|
call packmsg(message,dgen) !Pack message into 72 bits
|
|
nsendingsh=0
|
|
if(iand(dgen(10),8).ne.0) nsendingsh=-1 !Plain text flag
|
|
|
|
call rs_encode(dgen,sent)
|
|
call interleave63(sent,1) !Apply interleaving
|
|
call graycode(sent,63,1) !Apply Gray code
|
|
nsym=126 !Symbols per transmission
|
|
nsps=4096
|
|
else
|
|
nsym=32
|
|
nsps=16384
|
|
nsendingsh=1 !Flag for shorthand message
|
|
endif
|
|
if(mode65.eq.0) go to 900
|
|
|
|
! Set up necessary constants
|
|
dt=1.d0/(samfac*11025.d0)
|
|
f0=118*11025.d0/1024
|
|
dfgen=mode65*11025.d0/4096.d0
|
|
phi=0.d0
|
|
i=0
|
|
k=0
|
|
do j=1,nsym
|
|
f=f0
|
|
if(nspecial.ne.0 .and. mod(j,2).eq.0) f=f0+10*nspecial*dfgen
|
|
if(nspecial.eq.0 .and. flip*pr(j).lt.0.0) then
|
|
k=k+1
|
|
f=f0+(sent(k)+2)*dfgen
|
|
endif
|
|
dphi=twopi*dt*f
|
|
do ii=1,nsps
|
|
phi=phi+dphi
|
|
if(phi.gt.twopi) phi=phi-twopi
|
|
xphi=phi
|
|
i=i+1
|
|
iwave(i)=32767.0*sin(xphi)
|
|
enddo
|
|
enddo
|
|
|
|
iwave(nsym*nsps+1:)=0
|
|
nwave=nsym*nsps + 5512
|
|
call unpackmsg(dgen,msgsent)
|
|
if(flip.lt.0.0) then
|
|
do i=22,1,-1
|
|
if(msgsent(i:i).ne.' ') goto 10
|
|
enddo
|
|
10 msgsent=msgsent(1:i)//' OOO'
|
|
endif
|
|
|
|
if(nsendingsh.eq.1) then
|
|
if(nspecial.eq.2) msgsent='RO'
|
|
if(nspecial.eq.3) msgsent='RRR'
|
|
if(nspecial.eq.4) msgsent='73'
|
|
endif
|
|
|
|
900 return
|
|
end subroutine gen65
|