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34 lines
890 B
Fortran
34 lines
890 B
Fortran
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subroutine sfox_demod(crcvd,f,t,isync,s3)
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use sfox_mod
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complex crcvd(NMAX) !Signal as received
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complex c(0:NSPS-1) !Work array, one symbol long
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real s3(0:NQ-1,0:NN-1) !Synchronized symbol spectra
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integer isync(44)
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! integer ipk(1)
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j0=nint(12000.0*(t+0.5))
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df=12000.0/NSPS
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i0=nint(f/df)-NQ/2
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k=-1
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do n=1,NDS !Loop over all symbols
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if(any(isync(1:NS).eq.n)) cycle
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jb=n*NSPS + j0
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ja=jb-NSPS+1
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if(ja.lt.1 .or. jb.gt.NMAX) cycle
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k=k+1
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c=crcvd(ja:jb)
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call four2a(c,NSPS,1,-1,1) !Compute symbol spectrum
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do i=0,NQ-1
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s3(i,k)=real(c(i0+i))**2 + aimag(c(i0+i))**2
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enddo
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! ipk=maxloc(s3(0:NQ-1,k))
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! if(k.lt.10) print*,'AAA',k,ipk(1)-1
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enddo
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call pctile(s3,NQ*NN,50,base)
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s3=s3/base
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return
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end subroutine sfox_demod
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