mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2025-10-30 20:40:28 -04:00
4f2d3d08d0
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7620 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
24 lines
406 B
Fortran
24 lines
406 B
Fortran
subroutine tweak1(ca,jz,f0,cb)
|
|
|
|
! Shift frequency of analytic signal ca, with output to cb
|
|
|
|
complex ca(jz),cb(jz)
|
|
real*8 twopi
|
|
complex*16 w,wstep
|
|
complex w4
|
|
data twopi/0.d0/
|
|
save twopi
|
|
|
|
if(twopi.eq.0.d0) twopi=8.d0*atan(1.d0)
|
|
w=1.d0
|
|
dphi=twopi*f0/12000.d0
|
|
wstep=cmplx(cos(dphi),sin(dphi))
|
|
do i=1,jz
|
|
w=w*wstep
|
|
w4=w
|
|
cb(i)=w4*ca(i)
|
|
enddo
|
|
|
|
return
|
|
end subroutine tweak1
|