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Add several more test routines.

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git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7640 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Joe Taylor 2017-04-19 19:55:11 +00:00
parent 69cd5a6104
commit 0c362ddd26
5 changed files with 287 additions and 182 deletions
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61
lib/fsk4hf/cpolyfit.f90 Normal file
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@ -0,0 +1,61 @@
subroutine cpolyfit(c,pp,id,maxn,aa,bb,zz)
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 c(0:NZ-1) !Complex waveform
complex zz(NS+ND) !Complex symbol values (intermediate)
real x(NS),yi(NS),yq(NS) !For complex polyfit
real pp(2*NSPS) !Shaped pulse for OQPSK
real aa(20),bb(20) !Fitted polyco's
integer id(NS+ND) !NRZ values (+/-1) for Sync and Data
ib=NSPS-1
ib2=N2-1
n=0
do j=1,117 !First-pass demodulation
ia=ib+1
ib=ia+N2-1
zz(j)=sum(pp*c(ia:ib))/NSPS
if(abs(id(j)).eq.2) then !Save all sync symbols
n=n+1
x(n)=float(ia+ib)/NZ - 1.0
yi(n)=real(zz(j))*0.5*id(j)
yq(n)=aimag(zz(j))*0.5*id(j)
! write(54,1225) n,x(n),yi(n),yq(n)
!1225 format(i5,3f12.4)
endif
if(j.le.116) then
zz(j+117)=sum(pp*c(ia+NSPS:ib+NSPS))/NSPS
endif
enddo
aa=0.
bb=0.
nterms=0
if(maxn.gt.0) then
! Fit sync info with a complex polynomial
npts=n
mode=0
chisqa0=1.e30
chisqb0=1.e30
nterms=maxn
! do nterms=1,maxn
call polyfit4(x,yi,yi,npts,nterms,mode,aa,chisqa)
call polyfit4(x,yq,yq,npts,nterms,mode,bb,chisqb)
! if(chisqa/chisqa0.ge.0.98 .and. chisqb/chisqb0.ge.0.98) exit
chisqa0=chisqa
chisqb0=chisqb
! enddo
endif
return
end subroutine cpolyfit

59
lib/fsk4hf/getfc1.f90 Normal file
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@ -0,0 +1,59 @@
subroutine getfc1(c,fc1)
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 c(0:NZ-1) !Complex waveform
complex c2(0:NFFT1-1) !Short spectra
real s(-NH1+1:NH1) !Coarse spectrum
nspec=NZ/NFFT1
fs=12000.0/72.0
df1=fs/NFFT1
s=0.
do k=1,nspec
ia=(k-1)*N2
ib=ia+N2-1
c2(0:N2-1)=c(ia:ib)
c2(N2:)=0.
call four2a(c2,NFFT1,1,-1,1)
do i=0,NFFT1-1
j=i
if(j.gt.NH1) j=j-NFFT1
s(j)=s(j) + real(c2(i))**2 + aimag(c2(i))**2
enddo
enddo
! call smo121(s,NFFT1)
smax=0.
ipk=0
fc1=0.
ia=nint(40.0/df1)
do i=-ia,ia
f=i*df1
if(s(i).gt.smax) then
smax=s(i)
ipk=i
fc1=f
endif
! write(51,3001) f,s(i),db(s(i))
! 3001 format(f10.3,e12.3,f10.3)
enddo
! The following is for testing SNR calibration:
! sp3n=(s(ipk-1)+s(ipk)+s(ipk+1)) !Sig + 3*noise
! base=(sum(s)-sp3n)/(NFFT1-3.0) !Noise per bin
! psig=sp3n-3*base !Sig only
! pnoise=(2500.0/df1)*base !Noise in 2500 Hz
! xsnrdb=db(psig/pnoise)
return
end subroutine getfc1

55
lib/fsk4hf/getfc2.f90 Normal file
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@ -0,0 +1,55 @@
subroutine getfc2(c,fc1,fc2)
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 c(0:NZ-1) !Complex waveform
complex cs(0:NZ-1) !For computing spectrum
real a(5)
fs=12000.0/72.0
baud=fs/NSPS
a(1)=-fc1
a(2:5)=0.
call twkfreq1(c,NZ,fs,a,cs) !Mix down by fc1
! Filter, square, then FFT to get refined carrier frequency fc2.
call four2a(cs,NZ,1,-1,1) !To freq domain
df=fs/NZ
ia=nint(0.75*baud/df)
cs(ia:NZ-1-ia)=0. !Save only freqs around fc1
call four2a(cs,NZ,1,1,1) !Back to time domain
cs=cs/NZ
cs=cs*cs !Square the data
call four2a(cs,NZ,1,-1,1) !Compute squared spectrum
! Find two peaks separated by baud
pmax=0.
fc2=0.
ic=nint(baud/df)
ja=nint(0.5*baud/df)
do j=-ja,ja
f2=j*df
ia=nint((f2-0.5*baud)/df)
if(ia.lt.0) ia=ia+NZ
ib=nint((f2+0.5*baud)/df)
p=real(cs(ia))**2 + aimag(cs(ia))**2 + &
real(cs(ib))**2 + aimag(cs(ib))**2
if(p.gt.pmax) then
pmax=p
fc2=0.5*f2
endif
! write(52,1200) f2,p,db(p)
!1200 format(f10.3,2f15.3)
enddo
return
end subroutine getfc2

206
lib/fsk4hf/mskhfsim.f90
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@ -28,19 +28,16 @@ program msksim
complex csync(0:NZ-1) !Sync symbols only, from cbb
complex cb13(0:N13-1) !Barker 13 waveform
complex c(0:NZ-1) !Complex waveform
complex cs(0:NZ-1) !For computing spectrum
complex c2(0:NFFT1-1) !Short spectra
complex zz(NS+ND) !Complex symbol values (intermediate)
complex z,z0
real s(-NH1+1:NH1) !Coarse spectrum
complex z
real xnoise(0:NZ-1) !Generated random noise
real ynoise(0:NZ-1) !Generated random noise
real x(NS),yi(NS),yq(NS) !For complex polyfit
real rxdata(ND),llr(ND) !Soft symbols
real pp(2*NSPS) !Shaped pulse for OQPSK
real a(5) !For twkfreq1
real aa(20),bb(20) !Fitted polyco's
integer id(NS+ND) !NRZ values (+/-1) for Sync and Data
integer ierror(NS+ND)
integer icw(NN)
integer*1 msgbits(KK),decoded(KK),apmask(ND),cw(ND)
! integer*1 codeword(ND)
@ -121,84 +118,12 @@ program msksim
c=c + cmplx(xnoise,ynoise) !Add AWGN noise
endif
!----------------------------------------------------------------- fc1
! First attempt at finding carrier frequency, fc1: low-resolution power spectra
nspec=NZ/NFFT1
df1=fs/NFFT1
s=0.
do k=1,nspec
ia=(k-1)*N2
ib=ia+N2-1
c2(0:N2-1)=c(ia:ib)
c2(N2:)=0.
call four2a(c2,NFFT1,1,-1,1)
do i=0,NFFT1-1
j=i
if(j.gt.NH1) j=j-NFFT1
s(j)=s(j) + real(c2(i))**2 + aimag(c2(i))**2
enddo
enddo
! call smo121(s,NFFT1)
smax=0.
ipk=0
fc1=0.
ia=nint(40.0/df1)
do i=-ia,ia
f=i*df1
if(s(i).gt.smax) then
smax=s(i)
ipk=i
fc1=f
endif
! write(51,3001) f,s(i),db(s(i))
! 3001 format(f10.3,e12.3,f10.3)
enddo
! The following is for testing SNR calibration:
! sp3n=(s(ipk-1)+s(ipk)+s(ipk+1)) !Sig + 3*noise
! base=(sum(s)-sp3n)/(NFFT1-3.0) !Noise per bin
! psig=sp3n-3*base !Sig only
! pnoise=(2500.0/df1)*base !Noise in 2500 Hz
! xsnrdb=db(psig/pnoise)
a(1)=-fc1
a(2:5)=0.
call twkfreq1(c,NZ,fs,a,cs) !Mix down by fc1
!----------------------------------------------------------------- fc2
! Filter, square, then FFT to get refined carrier frequency fc2.
call four2a(cs,NZ,1,-1,1) !To freq domain
df=fs/NZ
ia=nint(0.75*baud/df)
cs(ia:NZ-1-ia)=0. !Save only freqs around fc1
call four2a(cs,NZ,1,1,1) !Back to time domain
cs=cs/NZ
cs=cs*cs !Square the data
call four2a(cs,NZ,1,-1,1) !Compute squared spectrum
! Find two peaks separated by baud
pmax=0.
fc2=0.
ic=nint(baud/df)
ja=nint(0.5*baud/df)
do j=-ja,ja
f2=j*df
ia=nint((f2-0.5*baud)/df)
if(ia.lt.0) ia=ia+NZ
ib=nint((f2+0.5*baud)/df)
p=real(cs(ia))**2 + aimag(cs(ia))**2 + &
real(cs(ib))**2 + aimag(cs(ib))**2
if(p.gt.pmax) then
pmax=p
fc2=0.5*f2
endif
! write(52,1200) f2,p,db(p)
!1200 format(f10.3,2f15.3)
enddo
call getfc1(c,fc1) !First approx for freq
call getfc2(c,fc1,fc2) !Refined freq
sqf=sqf + (fc1+fc2-f0)**2
a(1)=-(fc1+fc2)
a(2:5)=0.
call twkfreq1(c,NZ,fs,a,c) !Mix c down by fc1+fc2
call twkfreq1(c,NZ,fs,a,c) !Mix c down by fc1+fc2
! z=sum(c(1680:2095)*cb13)/208.0 !Get phase from Barker 13 vector
! z0=z/abs(z)
@ -218,103 +143,12 @@ program msksim
enddo
xdt=jpk/fs
!------------------------------------------------------------------ cpolyfit
ib=NSPS-1
ib2=N2-1
n=0
do j=1,117 !First-pass demodulation
ia=ib+1
ib=ia+N2-1
zz(j)=sum(pp*c(ia:ib))/NSPS
if(abs(id(j)).eq.2) then !Save all sync symbols
n=n+1
x(n)=float(ia+ib)/NZ - 1.0
yi(n)=real(zz(j))*0.5*id(j)
yq(n)=aimag(zz(j))*0.5*id(j)
! write(54,1225) n,x(n),yi(n),yq(n)
!1225 format(i5,3f12.4)
endif
if(j.le.116) then
zz(j+117)=sum(pp*c(ia+NSPS:ib+NSPS))/NSPS
endif
enddo
call cpolyfit(c,pp,id,maxn,aa,bb,zz)
nterms=maxn
aa=0.
bb=0.
nterms=0
if(maxn.gt.0) then
! Fit sync info with a complex polynomial
npts=n
mode=0
chisqa0=1.e30
chisqb0=1.e30
do nterms=1,maxn
call polyfit4(x,yi,yi,npts,nterms,mode,aa,chisqa)
call polyfit4(x,yq,yq,npts,nterms,mode,bb,chisqb)
if(chisqa/chisqa0.ge.0.98 .and. chisqb/chisqb0.ge.0.98) exit
chisqa0=chisqa
chisqb0=chisqb
enddo
endif
!-------------------------------------------------------------- Soft Symbols
n=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)
if(abs(id(j)).eq.2) then
if(real(z)*id(j).lt.0) then
nhardsync=nhardsync+1
nhardsync0=nhardsync0+1
endif
! write(55,2002) j,id(j)/2,xx,z*id(j)/2 !Sync bit
!2002 format(2i5,3f10.3)
else
p=real(z) !Data bit
n=n+1
rxdata(n)=p
ierr=0
if(id(j)*p.lt.0) ierr=1
nhard0=nhard0+ierr
nhard=nhard+ierr
! write(56,2003) j,id(j),n,ierr,nhard,xx,p*id(j),z
!2003 format(5i6,4f10.3)
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) ierr=1
nhard=nhard+ierr
enddo
call msksoftsym(zz,aa,bb,id,nterms,ierror,rxdata)
!---------------------------------------------------------------- Decode
rxav=sum(rxdata)/ND
rx2av=sum(rxdata*rxdata)/ND
rxsig=sqrt(rx2av-rxav*rxav)
@ -330,11 +164,18 @@ program msksim
if(niterations.lt.0 .or. count(msgbits.ne.decoded).gt.0 .or. &
nbadcrc.ne.0) ifer=1
nfe=nfe+ifer
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
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@ -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