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https://github.com/saitohirga/WSJT-X.git
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Add several more test routines.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7640 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
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61
lib/fsk4hf/cpolyfit.f90
Normal file
61
lib/fsk4hf/cpolyfit.f90
Normal file
@ -0,0 +1,61 @@
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subroutine cpolyfit(c,pp,id,maxn,aa,bb,zz)
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parameter (KK=84) !Information bits (72 + CRC12)
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parameter (ND=168) !Data symbols: LDPC (168,84), r=1/2
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parameter (NS=65) !Sync symbols (2 x 26 + Barker 13)
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parameter (NR=3) !Ramp up/down
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parameter (NN=NR+NS+ND) !Total symbols (236)
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parameter (NSPS=16) !Samples per MSK symbol (16)
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parameter (N2=2*NSPS) !Samples per OQPSK symbol (32)
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parameter (N13=13*N2) !Samples in central sync vector (416)
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parameter (NZ=NSPS*NN) !Samples in baseband waveform (3760)
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parameter (NFFT1=4*NSPS,NH1=NFFT1/2)
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complex c(0:NZ-1) !Complex waveform
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complex zz(NS+ND) !Complex symbol values (intermediate)
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real x(NS),yi(NS),yq(NS) !For complex polyfit
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real pp(2*NSPS) !Shaped pulse for OQPSK
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real aa(20),bb(20) !Fitted polyco's
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integer id(NS+ND) !NRZ values (+/-1) for Sync and Data
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ib=NSPS-1
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ib2=N2-1
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n=0
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do j=1,117 !First-pass demodulation
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ia=ib+1
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ib=ia+N2-1
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zz(j)=sum(pp*c(ia:ib))/NSPS
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if(abs(id(j)).eq.2) then !Save all sync symbols
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n=n+1
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x(n)=float(ia+ib)/NZ - 1.0
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yi(n)=real(zz(j))*0.5*id(j)
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yq(n)=aimag(zz(j))*0.5*id(j)
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! write(54,1225) n,x(n),yi(n),yq(n)
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!1225 format(i5,3f12.4)
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endif
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if(j.le.116) then
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zz(j+117)=sum(pp*c(ia+NSPS:ib+NSPS))/NSPS
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endif
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enddo
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aa=0.
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bb=0.
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nterms=0
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if(maxn.gt.0) then
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! Fit sync info with a complex polynomial
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npts=n
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mode=0
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chisqa0=1.e30
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chisqb0=1.e30
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nterms=maxn
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! do nterms=1,maxn
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call polyfit4(x,yi,yi,npts,nterms,mode,aa,chisqa)
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call polyfit4(x,yq,yq,npts,nterms,mode,bb,chisqb)
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! if(chisqa/chisqa0.ge.0.98 .and. chisqb/chisqb0.ge.0.98) exit
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chisqa0=chisqa
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chisqb0=chisqb
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! enddo
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endif
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return
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end subroutine cpolyfit
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59
lib/fsk4hf/getfc1.f90
Normal file
59
lib/fsk4hf/getfc1.f90
Normal file
@ -0,0 +1,59 @@
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subroutine getfc1(c,fc1)
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parameter (KK=84) !Information bits (72 + CRC12)
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parameter (ND=168) !Data symbols: LDPC (168,84), r=1/2
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parameter (NS=65) !Sync symbols (2 x 26 + Barker 13)
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parameter (NR=3) !Ramp up/down
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parameter (NN=NR+NS+ND) !Total symbols (236)
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parameter (NSPS=16) !Samples per MSK symbol (16)
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parameter (N2=2*NSPS) !Samples per OQPSK symbol (32)
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parameter (N13=13*N2) !Samples in central sync vector (416)
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parameter (NZ=NSPS*NN) !Samples in baseband waveform (3760)
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parameter (NFFT1=4*NSPS,NH1=NFFT1/2)
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complex c(0:NZ-1) !Complex waveform
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complex c2(0:NFFT1-1) !Short spectra
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real s(-NH1+1:NH1) !Coarse spectrum
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nspec=NZ/NFFT1
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fs=12000.0/72.0
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df1=fs/NFFT1
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s=0.
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do k=1,nspec
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ia=(k-1)*N2
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ib=ia+N2-1
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c2(0:N2-1)=c(ia:ib)
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c2(N2:)=0.
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call four2a(c2,NFFT1,1,-1,1)
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do i=0,NFFT1-1
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j=i
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if(j.gt.NH1) j=j-NFFT1
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s(j)=s(j) + real(c2(i))**2 + aimag(c2(i))**2
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enddo
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enddo
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! call smo121(s,NFFT1)
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smax=0.
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ipk=0
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fc1=0.
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ia=nint(40.0/df1)
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do i=-ia,ia
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f=i*df1
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if(s(i).gt.smax) then
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smax=s(i)
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ipk=i
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fc1=f
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endif
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! write(51,3001) f,s(i),db(s(i))
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! 3001 format(f10.3,e12.3,f10.3)
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enddo
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! The following is for testing SNR calibration:
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! sp3n=(s(ipk-1)+s(ipk)+s(ipk+1)) !Sig + 3*noise
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! base=(sum(s)-sp3n)/(NFFT1-3.0) !Noise per bin
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! psig=sp3n-3*base !Sig only
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! pnoise=(2500.0/df1)*base !Noise in 2500 Hz
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! xsnrdb=db(psig/pnoise)
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return
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end subroutine getfc1
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55
lib/fsk4hf/getfc2.f90
Normal file
55
lib/fsk4hf/getfc2.f90
Normal file
@ -0,0 +1,55 @@
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subroutine getfc2(c,fc1,fc2)
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parameter (KK=84) !Information bits (72 + CRC12)
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parameter (ND=168) !Data symbols: LDPC (168,84), r=1/2
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parameter (NS=65) !Sync symbols (2 x 26 + Barker 13)
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parameter (NR=3) !Ramp up/down
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parameter (NN=NR+NS+ND) !Total symbols (236)
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parameter (NSPS=16) !Samples per MSK symbol (16)
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parameter (N2=2*NSPS) !Samples per OQPSK symbol (32)
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parameter (N13=13*N2) !Samples in central sync vector (416)
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parameter (NZ=NSPS*NN) !Samples in baseband waveform (3760)
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parameter (NFFT1=4*NSPS,NH1=NFFT1/2)
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complex c(0:NZ-1) !Complex waveform
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complex cs(0:NZ-1) !For computing spectrum
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real a(5)
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fs=12000.0/72.0
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baud=fs/NSPS
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a(1)=-fc1
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a(2:5)=0.
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call twkfreq1(c,NZ,fs,a,cs) !Mix down by fc1
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! Filter, square, then FFT to get refined carrier frequency fc2.
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call four2a(cs,NZ,1,-1,1) !To freq domain
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df=fs/NZ
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ia=nint(0.75*baud/df)
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cs(ia:NZ-1-ia)=0. !Save only freqs around fc1
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call four2a(cs,NZ,1,1,1) !Back to time domain
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cs=cs/NZ
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cs=cs*cs !Square the data
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call four2a(cs,NZ,1,-1,1) !Compute squared spectrum
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! Find two peaks separated by baud
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pmax=0.
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fc2=0.
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ic=nint(baud/df)
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ja=nint(0.5*baud/df)
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do j=-ja,ja
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f2=j*df
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ia=nint((f2-0.5*baud)/df)
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if(ia.lt.0) ia=ia+NZ
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ib=nint((f2+0.5*baud)/df)
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p=real(cs(ia))**2 + aimag(cs(ia))**2 + &
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real(cs(ib))**2 + aimag(cs(ib))**2
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if(p.gt.pmax) then
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pmax=p
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fc2=0.5*f2
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endif
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! write(52,1200) f2,p,db(p)
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!1200 format(f10.3,2f15.3)
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enddo
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return
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end subroutine getfc2
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@ -28,19 +28,16 @@ program msksim
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complex csync(0:NZ-1) !Sync symbols only, from cbb
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complex cb13(0:N13-1) !Barker 13 waveform
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complex c(0:NZ-1) !Complex waveform
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complex cs(0:NZ-1) !For computing spectrum
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complex c2(0:NFFT1-1) !Short spectra
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complex zz(NS+ND) !Complex symbol values (intermediate)
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complex z,z0
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real s(-NH1+1:NH1) !Coarse spectrum
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complex z
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real xnoise(0:NZ-1) !Generated random noise
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real ynoise(0:NZ-1) !Generated random noise
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real x(NS),yi(NS),yq(NS) !For complex polyfit
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real rxdata(ND),llr(ND) !Soft symbols
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real pp(2*NSPS) !Shaped pulse for OQPSK
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real a(5) !For twkfreq1
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real aa(20),bb(20) !Fitted polyco's
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integer id(NS+ND) !NRZ values (+/-1) for Sync and Data
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integer ierror(NS+ND)
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integer icw(NN)
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integer*1 msgbits(KK),decoded(KK),apmask(ND),cw(ND)
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! integer*1 codeword(ND)
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@ -121,84 +118,12 @@ program msksim
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c=c + cmplx(xnoise,ynoise) !Add AWGN noise
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endif
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!----------------------------------------------------------------- fc1
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! First attempt at finding carrier frequency, fc1: low-resolution power spectra
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nspec=NZ/NFFT1
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df1=fs/NFFT1
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s=0.
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do k=1,nspec
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ia=(k-1)*N2
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ib=ia+N2-1
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c2(0:N2-1)=c(ia:ib)
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c2(N2:)=0.
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call four2a(c2,NFFT1,1,-1,1)
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do i=0,NFFT1-1
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j=i
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if(j.gt.NH1) j=j-NFFT1
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s(j)=s(j) + real(c2(i))**2 + aimag(c2(i))**2
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enddo
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enddo
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! call smo121(s,NFFT1)
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smax=0.
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ipk=0
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fc1=0.
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ia=nint(40.0/df1)
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do i=-ia,ia
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f=i*df1
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if(s(i).gt.smax) then
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smax=s(i)
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ipk=i
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fc1=f
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endif
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! write(51,3001) f,s(i),db(s(i))
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! 3001 format(f10.3,e12.3,f10.3)
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enddo
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! The following is for testing SNR calibration:
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! sp3n=(s(ipk-1)+s(ipk)+s(ipk+1)) !Sig + 3*noise
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! base=(sum(s)-sp3n)/(NFFT1-3.0) !Noise per bin
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! psig=sp3n-3*base !Sig only
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! pnoise=(2500.0/df1)*base !Noise in 2500 Hz
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! xsnrdb=db(psig/pnoise)
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a(1)=-fc1
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a(2:5)=0.
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call twkfreq1(c,NZ,fs,a,cs) !Mix down by fc1
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!----------------------------------------------------------------- fc2
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! Filter, square, then FFT to get refined carrier frequency fc2.
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call four2a(cs,NZ,1,-1,1) !To freq domain
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df=fs/NZ
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ia=nint(0.75*baud/df)
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cs(ia:NZ-1-ia)=0. !Save only freqs around fc1
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call four2a(cs,NZ,1,1,1) !Back to time domain
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cs=cs/NZ
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cs=cs*cs !Square the data
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call four2a(cs,NZ,1,-1,1) !Compute squared spectrum
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! Find two peaks separated by baud
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pmax=0.
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fc2=0.
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ic=nint(baud/df)
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ja=nint(0.5*baud/df)
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do j=-ja,ja
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f2=j*df
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ia=nint((f2-0.5*baud)/df)
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if(ia.lt.0) ia=ia+NZ
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ib=nint((f2+0.5*baud)/df)
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p=real(cs(ia))**2 + aimag(cs(ia))**2 + &
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real(cs(ib))**2 + aimag(cs(ib))**2
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if(p.gt.pmax) then
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pmax=p
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fc2=0.5*f2
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endif
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! write(52,1200) f2,p,db(p)
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!1200 format(f10.3,2f15.3)
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enddo
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call getfc1(c,fc1) !First approx for freq
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call getfc2(c,fc1,fc2) !Refined freq
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sqf=sqf + (fc1+fc2-f0)**2
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a(1)=-(fc1+fc2)
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a(2:5)=0.
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call twkfreq1(c,NZ,fs,a,c) !Mix c down by fc1+fc2
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call twkfreq1(c,NZ,fs,a,c) !Mix c down by fc1+fc2
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! z=sum(c(1680:2095)*cb13)/208.0 !Get phase from Barker 13 vector
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! z0=z/abs(z)
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@ -217,104 +142,13 @@ program msksim
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!1220 format(i6,3f10.4)
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enddo
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xdt=jpk/fs
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call cpolyfit(c,pp,id,maxn,aa,bb,zz)
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nterms=maxn
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!------------------------------------------------------------------ cpolyfit
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ib=NSPS-1
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ib2=N2-1
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n=0
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do j=1,117 !First-pass demodulation
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ia=ib+1
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ib=ia+N2-1
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zz(j)=sum(pp*c(ia:ib))/NSPS
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if(abs(id(j)).eq.2) then !Save all sync symbols
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n=n+1
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x(n)=float(ia+ib)/NZ - 1.0
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yi(n)=real(zz(j))*0.5*id(j)
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yq(n)=aimag(zz(j))*0.5*id(j)
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! write(54,1225) n,x(n),yi(n),yq(n)
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!1225 format(i5,3f12.4)
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endif
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if(j.le.116) then
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zz(j+117)=sum(pp*c(ia+NSPS:ib+NSPS))/NSPS
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endif
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enddo
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aa=0.
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bb=0.
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nterms=0
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if(maxn.gt.0) then
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! Fit sync info with a complex polynomial
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npts=n
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mode=0
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chisqa0=1.e30
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chisqb0=1.e30
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do nterms=1,maxn
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call polyfit4(x,yi,yi,npts,nterms,mode,aa,chisqa)
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call polyfit4(x,yq,yq,npts,nterms,mode,bb,chisqb)
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if(chisqa/chisqa0.ge.0.98 .and. chisqb/chisqb0.ge.0.98) exit
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chisqa0=chisqa
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chisqb0=chisqb
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enddo
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endif
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!-------------------------------------------------------------- Soft Symbols
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n=0
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do j=1,117
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xx=j*2.0/117.0 - 1.0
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yii=1.
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yqq=0.
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if(nterms.gt.0) then
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yii=aa(1)
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yqq=bb(1)
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do i=2,nterms
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yii=yii + aa(i)*xx**(i-1)
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yqq=yqq + bb(i)*xx**(i-1)
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enddo
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endif
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z0=cmplx(yii,yqq)
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z=zz(j)*conjg(z0)
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if(abs(id(j)).eq.2) then
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if(real(z)*id(j).lt.0) then
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nhardsync=nhardsync+1
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nhardsync0=nhardsync0+1
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endif
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! write(55,2002) j,id(j)/2,xx,z*id(j)/2 !Sync bit
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!2002 format(2i5,3f10.3)
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else
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p=real(z) !Data bit
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n=n+1
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rxdata(n)=p
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ierr=0
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if(id(j)*p.lt.0) ierr=1
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nhard0=nhard0+ierr
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nhard=nhard+ierr
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! write(56,2003) j,id(j),n,ierr,nhard,xx,p*id(j),z
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!2003 format(5i6,4f10.3)
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endif
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enddo
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do j=118,233
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xx=(j-116.5)*2.0/117.0 - 1.0
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yii=1.
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yqq=0.
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if(nterms.gt.0) then
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yii=aa(1)
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yqq=bb(1)
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do i=2,nterms
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yii=yii + aa(i)*xx**(i-1)
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yqq=yqq + bb(i)*xx**(i-1)
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enddo
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endif
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z0=cmplx(yii,yqq)
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z=zz(j)*conjg(z0)
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p=aimag(z)
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n=n+1
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rxdata(n)=p
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ierr=0
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if(id(j)*p.lt.0) ierr=1
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nhard=nhard+ierr
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enddo
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call msksoftsym(zz,aa,bb,id,nterms,ierror,rxdata)
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!---------------------------------------------------------------- Decode
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rxav=sum(rxdata)/ND
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rx2av=sum(rxdata*rxdata)/ND
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rxsig=sqrt(rx2av-rxav*rxav)
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@ -330,11 +164,18 @@ program msksim
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if(niterations.lt.0 .or. count(msgbits.ne.decoded).gt.0 .or. &
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nbadcrc.ne.0) ifer=1
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nfe=nfe+ifer
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||||
write(58,1045) snrdb,nhard0,nhardsync0,niterations,nbadcrc,ifer, &
|
||||
nterms,fc1+fc2-f0,xdt
|
||||
if(ifer.eq.1) write(59,1045) snrdb,nhard0,nhardsync0,niterations, &
|
||||
nbadcrc,ifer,nterms,fc1+fc2-f0,xdt
|
||||
1045 format(f6.1,6i5,2f8.3)
|
||||
! write(58,1045) snrdb,nhard0,nhardsync0,niterations,nbadcrc,ifer, &
|
||||
! nterms,fc1+fc2-f0,xdt
|
||||
! if(ifer.eq.1) write(59,1045) snrdb,nhard0,nhardsync0,niterations, &
|
||||
! nbadcrc,ifer,nterms,fc1+fc2-f0,xdt
|
||||
!1045 format(f6.1,6i5,2f8.3)
|
||||
! if(ifer.gt.0) then
|
||||
! write(63,1046) iter,nhard0,nhardsync0
|
||||
!1046 format(/3i6)
|
||||
! write(63,1047) ierror(1:117)
|
||||
! write(63,1047) ierror(118:233)
|
||||
!1047 format(70i1)
|
||||
! endif
|
||||
enddo
|
||||
fsigma=sqrt(sqf/iters)
|
||||
ber=float(nhard)/((NS+ND)*iters)
|
||||
@ -345,3 +186,8 @@ program msksim
|
||||
enddo
|
||||
|
||||
999 end program msksim
|
||||
|
||||
include 'getfc1.f90'
|
||||
include 'getfc2.f90'
|
||||
include 'cpolyfit.f90'
|
||||
include 'msksoftsym.f90'
|
||||
|
84
lib/fsk4hf/msksoftsym.f90
Normal file
84
lib/fsk4hf/msksoftsym.f90
Normal file
@ -0,0 +1,84 @@
|
||||
subroutine msksoftsym(zz,aa,bb,id,nterms,ierror,rxdata)
|
||||
|
||||
parameter (KK=84) !Information bits (72 + CRC12)
|
||||
parameter (ND=168) !Data symbols: LDPC (168,84), r=1/2
|
||||
parameter (NS=65) !Sync symbols (2 x 26 + Barker 13)
|
||||
parameter (NR=3) !Ramp up/down
|
||||
parameter (NN=NR+NS+ND) !Total symbols (236)
|
||||
parameter (NSPS=16) !Samples per MSK symbol (16)
|
||||
parameter (N2=2*NSPS) !Samples per OQPSK symbol (32)
|
||||
parameter (N13=13*N2) !Samples in central sync vector (416)
|
||||
parameter (NZ=NSPS*NN) !Samples in baseband waveform (3760)
|
||||
parameter (NFFT1=4*NSPS,NH1=NFFT1/2)
|
||||
|
||||
complex zz(NS+ND) !Complex symbol values (intermediate)
|
||||
complex z,z0
|
||||
real rxdata(ND) !Soft symbols
|
||||
real aa(20),bb(20) !Fitted polyco's
|
||||
integer id(NS+ND) !NRZ values (+/-1) for Sync and Data
|
||||
integer ierror(NS+ND)
|
||||
|
||||
n=0
|
||||
ierror=0
|
||||
do j=1,117
|
||||
xx=j*2.0/117.0 - 1.0
|
||||
yii=1.
|
||||
yqq=0.
|
||||
if(nterms.gt.0) then
|
||||
yii=aa(1)
|
||||
yqq=bb(1)
|
||||
do i=2,nterms
|
||||
yii=yii + aa(i)*xx**(i-1)
|
||||
yqq=yqq + bb(i)*xx**(i-1)
|
||||
enddo
|
||||
endif
|
||||
z0=cmplx(yii,yqq)
|
||||
z=zz(j)*conjg(z0)
|
||||
p=real(z)
|
||||
if(abs(id(j)).eq.2) then
|
||||
if(real(z)*id(j).lt.0) then !Sync bit
|
||||
nhardsync=nhardsync+1
|
||||
nhardsync0=nhardsync0+1
|
||||
ierror(j)=2
|
||||
endif
|
||||
else
|
||||
n=n+1 !Data bit
|
||||
rxdata(n)=p
|
||||
ierr=0
|
||||
if(id(j)*p.lt.0) then
|
||||
ierr=1
|
||||
ierror(j)=1
|
||||
endif
|
||||
nhard0=nhard0+ierr
|
||||
nhard=nhard+ierr
|
||||
endif
|
||||
enddo
|
||||
|
||||
do j=118,233
|
||||
xx=(j-116.5)*2.0/117.0 - 1.0
|
||||
yii=1.
|
||||
yqq=0.
|
||||
if(nterms.gt.0) then
|
||||
yii=aa(1)
|
||||
yqq=bb(1)
|
||||
do i=2,nterms
|
||||
yii=yii + aa(i)*xx**(i-1)
|
||||
yqq=yqq + bb(i)*xx**(i-1)
|
||||
enddo
|
||||
endif
|
||||
z0=cmplx(yii,yqq)
|
||||
z=zz(j)*conjg(z0)
|
||||
p=aimag(z)
|
||||
n=n+1
|
||||
rxdata(n)=p
|
||||
ierr=0
|
||||
if(id(j)*p.lt.0) then
|
||||
ierr=1
|
||||
ierror(j)=1
|
||||
endif
|
||||
nhard0=nhard0+ierr
|
||||
nhard=nhard+ierr
|
||||
enddo
|
||||
|
||||
return
|
||||
end subroutine msksoftsym
|
Loading…
Reference in New Issue
Block a user