subroutine get_spectrum_baseline(dd,nfa,nfb,sbase) include 'ft8_params.f90' parameter(NST=NFFT1/2,NF=NMAX/NST-1) real s(NH1,NF) real savg(NH1) real sbase(NH1) real x(NFFT1) real window(NFFT1) complex cx(0:NH1) real dd(NMAX) equivalence (x,cx) logical first data first/.true./ save first,window if(first) then first=.false. pi=4.0*atan(1.) window=0. call nuttal_window(window,NFFT1) window=window/sum(window)*NSPS*2/300.0 endif ! Compute symbol spectra, stepping by NSTEP steps. savg=0. df=12000.0/NFFT1 do j=1,NF ia=(j-1)*NST + 1 ib=ia+NFFT1-1 if(ib.gt.NMAX) exit x=dd(ia:ib)*window call four2a(x,NFFT1,1,-1,0) !r2c FFT s(1:NH1,j)=abs(cx(1:NH1))**2 savg=savg + s(1:NH1,j) !Average spectrum enddo if(nfa.lt.nint(200.0)) nfa=nint(200.0) if(nfb.gt.nint(4910.0)) nfb=nint(4910.0) call baseline(savg,nfa,nfb,sbase) return end subroutine get_spectrum_baseline