mirror of https://github.com/saitohirga/WSJT-X.git
94 lines
2.6 KiB
Fortran
94 lines
2.6 KiB
Fortran
program JTMSKsim
|
|
|
|
use wavhdr
|
|
parameter (NMAX=15*12000)
|
|
real pings(0:NMAX-1)
|
|
character arg*8,msg*22,msgsent*22,fname*40
|
|
character*3 rpt(0:7)
|
|
complex cmsg(0:1404-1) !Waveform of message (once)
|
|
complex cwave(0:NMAX-1) !Simulated received waveform
|
|
real*8 dt,twopi,freq,phi,dphi0,dphi1,dphi
|
|
type(hdr) h !Header for .wav file
|
|
integer*2 iwave(0:NMAX-1)
|
|
integer itone(234) !Message bits
|
|
integer b11(11) !Barker-11 code
|
|
data b11/1,1,1,0,0,0,1,0,0,1,0/
|
|
data rpt /'26 ','27 ','28 ','R26','R27','R28','RRR','73 '/
|
|
|
|
nargs=iargc()
|
|
if(nargs.ne.5) then
|
|
print*,'Usage: JTMSKsim message freq width snr nfiles'
|
|
print*,' '
|
|
print*,'Examples: JTMSKsim "K1ABC W9XYZ EN37" 1500 0.12 2 1'
|
|
print*,' JTMSKsim "<K1ABC W9XYZ> R26" 1500 0.01 1 3'
|
|
go to 999
|
|
endif
|
|
call getarg(1,msg)
|
|
call getarg(2,arg)
|
|
read(arg,*) freq
|
|
call getarg(3,arg)
|
|
read(arg,*) width
|
|
call getarg(4,arg)
|
|
read(arg,*) snrdb
|
|
call getarg(5,arg)
|
|
read(arg,*) nfiles
|
|
sig=10.0**(0.05*snrdb)
|
|
twopi=8.d0*atan(1.d0)
|
|
h=default_header(12000,NMAX)
|
|
|
|
ichk=0
|
|
call genmsk(msg,ichk,msgsent,itone,itype) !Check message type
|
|
if(itype.lt.1 .or. itype.gt.7) then
|
|
print*,'Illegal message'
|
|
go to 999
|
|
endif
|
|
dt=1.d0/12000.d0 !Sample interval
|
|
dphi0=twopi*(freq-500.d0)*dt !Phase increment, lower tone
|
|
dphi1=twopi*(freq+500.d0)*dt !Phase increment, upper tone
|
|
|
|
nsym=234
|
|
if(itype.eq.7) nsym=35
|
|
nspm=6*nsym !Samples per message
|
|
k=-1
|
|
phi=0.d0
|
|
do j=1,nsym
|
|
dphi=dphi0
|
|
if(itone(j).eq.1) dphi=dphi1
|
|
do i=1,6
|
|
k=k+1
|
|
phi=phi + dphi
|
|
if(phi.gt.twopi) phi=phi-twopi
|
|
xphi=phi
|
|
cmsg(k)=cmplx(cos(xphi),sin(xphi))
|
|
enddo
|
|
enddo
|
|
|
|
call makepings(pings,NMAX,width,sig)
|
|
|
|
do ifile=1,nfiles !Loop over requested number of files
|
|
write(fname,1002) ifile !Output filename
|
|
1002 format('000000_',i4.4)
|
|
open(10,file=fname(1:11)//'.wav',access='stream',status='unknown')
|
|
|
|
fac=sqrt(6000.0/2500.0)
|
|
j=-1
|
|
do i=0,NMAX-1
|
|
j=j+1
|
|
if(j.ge.6*nsym) j=j-6*nsym
|
|
xx=0.707*gran()
|
|
yy=0.707*gran()
|
|
cwave(i)=pings(i)*cmsg(j) + fac*cmplx(xx,yy)
|
|
iwave(i)=30.0*real(cwave(i))
|
|
! write(88,3003) i,i/12000.d0,cwave(i)
|
|
!3003 format(i8,f12.6,2f10.3)
|
|
enddo
|
|
|
|
write(10) h,iwave !Save the .wav file
|
|
close(10)
|
|
|
|
! call jtmsk_short(cwave,NMAX,msg)
|
|
|
|
enddo
|
|
|
|
999 end program JTMSKsim
|