mirror of https://github.com/saitohirga/WSJT-X.git
34 lines
785 B
Fortran
34 lines
785 B
Fortran
program mfsk
|
|
! Compute probability of symbol error for non-coherent MFSK
|
|
implicit real*16 (a-h,o-z)
|
|
integer*8 binomial
|
|
integer x,s,XX,NN,M
|
|
real*16 hypergeo, snr, term, sum
|
|
character arg*8
|
|
|
|
nargs=iargc()
|
|
if(nargs.ne.1) then
|
|
print*,'Probability of symbol error for noncoherent MFSK'
|
|
print*,'Usage: prob M'
|
|
print*,'Example: prob 64'
|
|
go to 999
|
|
endif
|
|
call getarg(1,arg)
|
|
read(arg,*) M
|
|
|
|
write(*,1012)
|
|
1012 format('Es/No P(symbol error)'/ &
|
|
'----------------------')
|
|
do isnr=0,20
|
|
esno=10**(isnr/2.0/10.0)
|
|
hsum=0.d0
|
|
do k=1,M-1
|
|
h=binomial(M-1,k)
|
|
h=h*((-1)**(k+1))/(k+1)
|
|
h=h*exp(-esno*k/(k+1))
|
|
hsum=hsum + h
|
|
enddo
|
|
write(*,'(f4.1,4x,e10.4)') isnr/2.0, hsum
|
|
enddo
|
|
999 end program mfsk
|