mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-16 00:51:56 -05:00
30 lines
609 B
Fortran
30 lines
609 B
Fortran
|
subroutine makepings(iwave,nwave)
|
||
|
|
|
||
|
|
parameter (NFSAMPLE=48000)
|
||
|
|
integer*2 iwave(nwave)
|
||
|
|
real*8 t
|
||
|
|
|
||
|
|
iping0=-999
|
||
|
|
dt=1.0/NFSAMPLE
|
||
|
|
do i=1,nwave
|
||
|
|
iping=i/(3*NFSAMPLE)
|
||
|
|
if(iping.ne.iping0) then
|
||
|
|
ip=mod(iping,3)
|
||
|
|
w=0.015*(4-ip)
|
||
|
|
ig=(iping-1)/3
|
||
|
|
amp=sqrt((3.0-ig)/3.0)
|
||
|
|
t0=dt*(iping+0.5)*(3*NFSAMPLE)
|
||
|
|
iping0=iping
|
||
|
|
endif
|
||
|
|
t=(i*dt-t0)/w
|
||
|
|
if(t.lt.0.d0 .and. t.lt.10.0) then
|
||
|
|
fac=0.
|
||
|
|
else
|
||
|
|
fac=2.718*t*dexp(-t)
|
||
|
|
endif
|
||
|
|
iwave(i)=nint(fac*amp*iwave(i))
|
||
|
|
enddo
|
||
|
|
|
||
|
|
return
|
||
|
|
end subroutine makepings
|