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git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7299 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
27 lines
821 B
Fortran
27 lines
821 B
Fortran
subroutine spec64(c0,npts2,mode64,jpk,s3,LL,NN)
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parameter (NSPS=2304) !Samples per symbol at 4000 Hz
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complex c0(0:360000) !Complex spectrum of dd()
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complex cs(0:NSPS-1) !Complex symbol spectrum
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real s3(LL,NN) !Synchronized symbol spectra
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nfft6=nsps
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fsample=4000.0
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df=fsample/nfft6
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do j=1,63
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jj=j+7 !Skip first Costas array
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if(j.ge.32) jj=j+14 !Skip middle Costas array
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ja=jpk + (jj-1)*nfft6
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jb=ja+nfft6-1
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cs(0:nfft6-1)=1.3e-8*c0(ja:jb)
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call four2a(cs,nfft6,1,-1,1)
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do ii=1,LL
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i=ii-65
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if(i.lt.0) i=i+nfft6
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s3(ii,j)=real(cs(i))**2 + aimag(cs(i))**2
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enddo
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enddo
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return
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end subroutine spec64
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