mirror of https://github.com/saitohirga/WSJT-X.git
78 lines
1.8 KiB
Fortran
78 lines
1.8 KiB
Fortran
subroutine gen_q65_wave(msg,ichk,ntxfreq,mode65,itype,msgsent,iwave,nwave)
|
|
|
|
! Encodes a QRA64 message to yield complex iwave() at fsample = 11025 Hz
|
|
|
|
use packjt
|
|
parameter (NMAX=2*60*11025)
|
|
character*22 msg
|
|
character*22 msgsent !Message as it will be received
|
|
character*120 cmnd
|
|
character*80 wsjtx_dir
|
|
character*16 cjunk
|
|
real*8 t,dt,phi,f,f0,dfgen,dphi,twopi,tsym
|
|
integer itone(85)
|
|
integer dgen(13)
|
|
integer sent(63)
|
|
integer*2 iwave(NMAX)
|
|
integer icos7(0:6)
|
|
logical first
|
|
data icos7/2,5,6,0,4,1,3/ !Defines a 7x7 Costas array
|
|
data twopi/6.283185307179586476d0/,first/.true./
|
|
save
|
|
|
|
if(first) then
|
|
open(9,file='wsjtx_dir.txt',status='old')
|
|
read(9,*) wsjtx_dir
|
|
close(9)
|
|
first=.false.
|
|
endif
|
|
|
|
msgsent=msg
|
|
! 1 2 3 4 5
|
|
! 12345678901234567890123456789012345678901234567890123456789012345
|
|
cmnd='q65sim "K1ABC W9XYZ EN37 " A 1500 0 0 0 0 60 0 99 >itone.txt'
|
|
cmnd(9:30)=msg
|
|
write(cmnd(35:38),'(i4)') ntxfreq
|
|
cmnd=trim(wsjtx_dir)//cmnd
|
|
call execute_command_line(cmnd)
|
|
open(9,file='itone.txt',status='old')
|
|
do i=1,99
|
|
read(9,1000,end=999) cjunk
|
|
1000 format(a16)
|
|
if(cjunk.eq.'Channel symbols:') exit
|
|
enddo
|
|
read(9,1002) itone
|
|
1002 format(20i3)
|
|
|
|
! Set up necessary constants
|
|
nsym=85
|
|
tsym=7200.d0/12000.d0
|
|
dt=1.d0/11025.d0
|
|
f0=ntxfreq
|
|
ndf=2**(mode65-1)
|
|
dfgen=ndf*12000.d0/7200.d0
|
|
phi=0.d0
|
|
dphi=twopi*dt*f0
|
|
i=0
|
|
iz=85*7200*11025.d0/12000.d0
|
|
t=0.d0
|
|
j0=0
|
|
do i=1,iz
|
|
t=t+dt
|
|
j=t/tsym
|
|
if(j.ne.j0) then
|
|
f=f0 + itone(j)*dfgen
|
|
dphi=twopi*dt*f
|
|
j0=j
|
|
endif
|
|
phi=phi+dphi
|
|
if(phi.gt.twopi) phi=phi-twopi
|
|
xphi=phi
|
|
iwave(2*i-1)=32767.0*cos(xphi)
|
|
iwave(2*i)=32767.0*sin(xphi)
|
|
enddo
|
|
nwave=2*iz
|
|
|
|
999 return
|
|
end subroutine gen_q65_wave
|