mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2025-07-31 21:22:27 -04:00
Baseline code with nsps=2048 in FT8.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7783 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Joe Taylor
parent
0e651cf14e
commit
35fd9febd3
@ -394,7 +394,7 @@ set (wsjt_FSRCS
|
|||||||
lib/fsk4hf/fsk4hf.f90
|
lib/fsk4hf/fsk4hf.f90
|
||||||
lib/fsk4hf/ft8b.f90
|
lib/fsk4hf/ft8b.f90
|
||||||
lib/fsk4hf/ft8d.f90
|
lib/fsk4hf/ft8d.f90
|
||||||
# lib/fsk4hf/ft8filbig.f90
|
lib/fsk4hf/ft8_downsample.f90
|
||||||
lib/fsk4hf/ft8sim.f90
|
lib/fsk4hf/ft8sim.f90
|
||||||
lib/gen4.f90
|
lib/gen4.f90
|
||||||
lib/gen65.f90
|
lib/gen65.f90
|
||||||
@ -503,6 +503,7 @@ set (wsjt_FSRCS
|
|||||||
lib/sync64.f90
|
lib/sync64.f90
|
||||||
lib/sync65.f90
|
lib/sync65.f90
|
||||||
lib/fsk4hf/sync8.f90
|
lib/fsk4hf/sync8.f90
|
||||||
|
lib/fsk4hf/sync8d.f90
|
||||||
lib/sync9.f90
|
lib/sync9.f90
|
||||||
lib/sync9f.f90
|
lib/sync9f.f90
|
||||||
lib/sync9w.f90
|
lib/sync9w.f90
|
||||||
|
|||||||
41
lib/fsk4hf/ft8_downsample.f90
Normal file
41
lib/fsk4hf/ft8_downsample.f90
Normal file
@ -0,0 +1,41 @@
|
|||||||
|
subroutine ft8_downsample(dd,newdat,f0,c1)
|
||||||
|
|
||||||
|
! Downconvert to complex data sampled at 187.5 Hz, 32 samples/symbol
|
||||||
|
|
||||||
|
parameter (NMAX=15*12000)
|
||||||
|
parameter (NFFT1=200000,NFFT2=3125) !200000/64 = 3125
|
||||||
|
logical newdat
|
||||||
|
complex c1(0:NFFT2-1)
|
||||||
|
complex cx(0:NFFT1/2)
|
||||||
|
real dd(NMAX),x(NFFT1)
|
||||||
|
equivalence (x,cx)
|
||||||
|
save cx
|
||||||
|
|
||||||
|
if(newdat) then
|
||||||
|
! Data in dd have changed, recompute the long FFT
|
||||||
|
x(1:NMAX)=dd
|
||||||
|
x(NMAX+1:NFFT1)=0. !Zero-pad the x array
|
||||||
|
call four2a(cx,NFFT1,1,-1,0) !r2c FFT to freq domain
|
||||||
|
newdat=.false.
|
||||||
|
endif
|
||||||
|
|
||||||
|
df=12000.0/NFFT1
|
||||||
|
baud=12000.0/2048.0
|
||||||
|
i0=nint(f0/df)
|
||||||
|
ft=f0+8.0*baud
|
||||||
|
it=min(nint(ft/df),NFFT1/2)
|
||||||
|
fb=f0-1.0*baud
|
||||||
|
ib=max(1,nint(fb/df))
|
||||||
|
k=0
|
||||||
|
c1=0.
|
||||||
|
do i=ib,it
|
||||||
|
c1(k)=cx(i)
|
||||||
|
k=k+1
|
||||||
|
enddo
|
||||||
|
c1=cshift(c1,i0-ib)
|
||||||
|
call four2a(c1,NFFT2,1,1,1) !c2c FFT back to time domain
|
||||||
|
fac=1.0/sqrt(float(NFFT1)*NFFT2)
|
||||||
|
c1=fac*c1
|
||||||
|
|
||||||
|
return
|
||||||
|
end subroutine ft8_downsample
|
||||||
@ -12,70 +12,39 @@ subroutine ft8b(dd0,newdat,nfqso,f1,xdt,nharderrors,dmin,nbadcrc,message,xsnr)
|
|||||||
real dd0(15*12000)
|
real dd0(15*12000)
|
||||||
integer*1 decoded(KK),apmask(3*ND),cw(3*ND)
|
integer*1 decoded(KK),apmask(3*ND),cw(3*ND)
|
||||||
integer itone(NN)
|
integer itone(NN)
|
||||||
integer icos7(0:6)
|
|
||||||
complex cd0(3125)
|
complex cd0(3125)
|
||||||
complex csync(0:6,32)
|
|
||||||
complex ctwk(32)
|
complex ctwk(32)
|
||||||
complex csymb(32)
|
complex csymb(32)
|
||||||
logical newdat,first
|
logical newdat
|
||||||
data icos7/2,5,6,0,4,1,3/
|
|
||||||
data first/.true./
|
|
||||||
save first,twopi,fs2,dt2,taus,baud,csync
|
|
||||||
|
|
||||||
if( first ) then
|
|
||||||
twopi=8.0*atan(1.0)
|
|
||||||
fs2=12000.0/64.0
|
|
||||||
dt2=1/fs2
|
|
||||||
taus=32*dt2
|
|
||||||
baud=1/taus
|
|
||||||
do i=0,6
|
|
||||||
phi=0.0
|
|
||||||
dphi=twopi*icos7(i)*baud*dt2
|
|
||||||
do j=1,32
|
|
||||||
csync(i,j)=cmplx(cos(phi),sin(phi))
|
|
||||||
phi=mod(phi+dphi,twopi)
|
|
||||||
enddo
|
|
||||||
enddo
|
|
||||||
first=.false.
|
|
||||||
endif
|
|
||||||
|
|
||||||
max_iterations=40
|
max_iterations=40
|
||||||
norder=2
|
norder=2
|
||||||
|
fs2=12000.0/64.0
|
||||||
|
dt2=1.0/fs2
|
||||||
|
twopi=8.0*atan(1.0)
|
||||||
|
delfbest=0.
|
||||||
|
ibest=0
|
||||||
|
|
||||||
! if(abs(nfqso-f1).lt.10.0) norder=3
|
! if(abs(nfqso-f1).lt.10.0) norder=3
|
||||||
call timer('ft8_down',0)
|
call timer('ft8_down',0)
|
||||||
call ft8_downsample(dd0,newdat,f1,cd0)
|
call ft8_downsample(dd0,newdat,f1,cd0) !Mix f1 to baseband and downsample
|
||||||
call timer('ft8_down',1)
|
call timer('ft8_down',1)
|
||||||
|
|
||||||
i0=xdt*fs2
|
i0=nint(xdt*fs2) !Initial guess for start of signal
|
||||||
smax=0.0
|
smax=0.0
|
||||||
do idt=i0-16,i0+16
|
do idt=i0-16,i0+16 !Search over +/- half a symbol
|
||||||
sync=0
|
call sync8d(cd0,idt,ctwk,0,sync)
|
||||||
do i=0,6
|
if(sync.gt.smax) then
|
||||||
i1=idt+i*32
|
smax=sync
|
||||||
i2=i1+36*32
|
ibest=idt
|
||||||
i3=i1+72*32
|
endif
|
||||||
term1=0.0 ! this needs to be fixed...
|
|
||||||
term2=0.0
|
|
||||||
term3=0.0
|
|
||||||
if( i1.ge.1 .and. i1+31.le.NP2 ) &
|
|
||||||
term1=abs(sum(cd0(i1:i1+31)*conjg(csync(i,1:32))))
|
|
||||||
if( i2.ge.1 .and. i2+31.le.NP2 ) &
|
|
||||||
term2=abs(sum(cd0(i2:i2+31)*conjg(csync(i,1:32))))
|
|
||||||
if( i3.ge.1 .and. i3+31.le.NP2 ) &
|
|
||||||
term3=abs(sum(cd0(i3:i3+31)*conjg(csync(i,1:32))))
|
|
||||||
sync=sync+term1+term2+term3
|
|
||||||
enddo
|
|
||||||
if( sync .gt. smax ) then
|
|
||||||
smax=sync
|
|
||||||
ibest=idt
|
|
||||||
endif
|
|
||||||
enddo
|
enddo
|
||||||
xdt2=ibest*dt2
|
xdt2=ibest*dt2 !Improved estimate for DT
|
||||||
|
|
||||||
! peak up the frequency
|
! Now peak up in frequency
|
||||||
i0=xdt2*fs2
|
i0=nint(xdt2*fs2)
|
||||||
smax=0.0
|
smax=0.0
|
||||||
do ifr=-5,5
|
do ifr=-5,5 !Search over +/- 2.5 Hz
|
||||||
delf=ifr*0.5
|
delf=ifr*0.5
|
||||||
dphi=twopi*delf*dt2
|
dphi=twopi*delf*dt2
|
||||||
phi=0.0
|
phi=0.0
|
||||||
@ -83,22 +52,7 @@ subroutine ft8b(dd0,newdat,nfqso,f1,xdt,nharderrors,dmin,nbadcrc,message,xsnr)
|
|||||||
ctwk(i)=cmplx(cos(phi),sin(phi))
|
ctwk(i)=cmplx(cos(phi),sin(phi))
|
||||||
phi=mod(phi+dphi,twopi)
|
phi=mod(phi+dphi,twopi)
|
||||||
enddo
|
enddo
|
||||||
sync=0.0
|
call sync8d(cd0,i0,ctwk,1,sync)
|
||||||
do i=0,6
|
|
||||||
i1=i0+i*32
|
|
||||||
i2=i1+36*32
|
|
||||||
i3=i1+72*32
|
|
||||||
term1=0.0 ! this needs to be fixed...
|
|
||||||
term2=0.0
|
|
||||||
term3=0.0
|
|
||||||
if( i1.ge.1 .and. i1+31.le.NP2 ) &
|
|
||||||
term1=abs(sum(cd0(i1:i1+31)*conjg(ctwk*csync(i,1:32))))
|
|
||||||
if( i2.ge.1 .and. i2+31.le.NP2 ) &
|
|
||||||
term2=abs(sum(cd0(i2:i2+31)*conjg(ctwk*csync(i,1:32))))
|
|
||||||
if( i3.ge.1 .and. i3+31.le.NP2 ) &
|
|
||||||
term3=abs(sum(cd0(i3:i3+31)*conjg(ctwk*csync(i,1:32))))
|
|
||||||
sync=sync+term1+term2+term3
|
|
||||||
enddo
|
|
||||||
if( sync .gt. smax ) then
|
if( sync .gt. smax ) then
|
||||||
smax=sync
|
smax=sync
|
||||||
delfbest=delf
|
delfbest=delf
|
||||||
@ -108,7 +62,9 @@ subroutine ft8b(dd0,newdat,nfqso,f1,xdt,nharderrors,dmin,nbadcrc,message,xsnr)
|
|||||||
a(1)=-delfbest
|
a(1)=-delfbest
|
||||||
call twkfreq1(cd0,NP2,fs2,a,cd0)
|
call twkfreq1(cd0,NP2,fs2,a,cd0)
|
||||||
xdt=xdt2
|
xdt=xdt2
|
||||||
f1=f1+delfbest
|
f1=f1+delfbest !Improved estimate of DF
|
||||||
|
|
||||||
|
call sync8d(cd0,i0,ctwk,2,sync)
|
||||||
|
|
||||||
j=0
|
j=0
|
||||||
do k=1,NN
|
do k=1,NN
|
||||||
@ -185,48 +141,7 @@ subroutine ft8b(dd0,newdat,nfqso,f1,xdt,nharderrors,dmin,nbadcrc,message,xsnr)
|
|||||||
xsnr=10.0*log10(xsnr)-27.0
|
xsnr=10.0*log10(xsnr)-27.0
|
||||||
if( xsnr .lt. -24.0 ) xsnr=-24.0
|
if( xsnr .lt. -24.0 ) xsnr=-24.0
|
||||||
endif
|
endif
|
||||||
|
|
||||||
900 continue
|
900 continue
|
||||||
return
|
return
|
||||||
end subroutine ft8b
|
end subroutine ft8b
|
||||||
|
|
||||||
subroutine ft8_downsample(dd,newdat,f0,c1)
|
|
||||||
|
|
||||||
! Downconvert to complex data sampled at 187.5 Hz, 32 samples/symbol
|
|
||||||
|
|
||||||
parameter (NMAX=15*12000)
|
|
||||||
parameter (NFFT1=200000,NFFT2=3125) !200000/64 = 3125
|
|
||||||
logical newdat
|
|
||||||
complex c1(0:NFFT2-1)
|
|
||||||
complex cx(0:NFFT1/2)
|
|
||||||
real dd(NMAX),x(NFFT1)
|
|
||||||
equivalence (x,cx)
|
|
||||||
save cx
|
|
||||||
|
|
||||||
if(newdat) then
|
|
||||||
! Data in dd have changed, recompute the long FFT
|
|
||||||
x(1:NMAX)=dd
|
|
||||||
x(NMAX+1:NFFT1)=0. !Zero-pad the x array
|
|
||||||
call four2a(cx,NFFT1,1,-1,0) !r2c FFT to freq domain
|
|
||||||
newdat=.false.
|
|
||||||
endif
|
|
||||||
|
|
||||||
df=12000.0/NFFT1
|
|
||||||
baud=12000.0/2048.0
|
|
||||||
i0=nint(f0/df)
|
|
||||||
ft=f0+8.0*baud
|
|
||||||
it=min(nint(ft/df),NFFT1/2)
|
|
||||||
fb=f0-1.0*baud
|
|
||||||
ib=max(1,nint(fb/df))
|
|
||||||
k=0
|
|
||||||
c1=0.
|
|
||||||
do i=ib,it
|
|
||||||
c1(k)=cx(i)
|
|
||||||
k=k+1
|
|
||||||
enddo
|
|
||||||
c1=cshift(c1,i0-ib)
|
|
||||||
call four2a(c1,NFFT2,1,1,1) !c2c FFT back to time domain
|
|
||||||
fac=1.0/sqrt(float(NFFT1)*NFFT2)
|
|
||||||
c1=fac*c1
|
|
||||||
|
|
||||||
return
|
|
||||||
end subroutine ft8_downsample
|
|
||||||
|
|||||||
54
lib/fsk4hf/sync8d.f90
Normal file
54
lib/fsk4hf/sync8d.f90
Normal file
@ -0,0 +1,54 @@
|
|||||||
|
subroutine sync8d(cd0,i0,ctwk,itwk,sync)
|
||||||
|
|
||||||
|
! Compute sync power for a complex, downsampled FT8 signal.
|
||||||
|
|
||||||
|
parameter(NP2=2812)
|
||||||
|
complex cd0(3125)
|
||||||
|
complex csync(0:6,32)
|
||||||
|
complex csync2(32)
|
||||||
|
complex ctwk(32)
|
||||||
|
complex z1,z2,z3
|
||||||
|
logical first
|
||||||
|
integer icos7(0:6)
|
||||||
|
data icos7/2,5,6,0,4,1,3/
|
||||||
|
data first/.true./
|
||||||
|
save first,twopi,fs2,dt2,taus,baud,csync
|
||||||
|
|
||||||
|
p(z1)=real(z1)**2 + aimag(z1)**2 !Statement function for power
|
||||||
|
|
||||||
|
! Set some constants and compute the csync array.
|
||||||
|
if( first ) then
|
||||||
|
twopi=8.0*atan(1.0)
|
||||||
|
fs2=12000.0/64.0 !Sample rate after downsampling
|
||||||
|
dt2=1/fs2 !Corresponding sample interval
|
||||||
|
taus=32*dt2 !Symbol duration
|
||||||
|
baud=1/taus !Keying rate
|
||||||
|
do i=0,6
|
||||||
|
phi=0.0
|
||||||
|
dphi=twopi*icos7(i)*baud*dt2
|
||||||
|
do j=1,32
|
||||||
|
csync(i,j)=cmplx(cos(phi),sin(phi)) !Waveform for 7x7 Costas array
|
||||||
|
phi=mod(phi+dphi,twopi)
|
||||||
|
enddo
|
||||||
|
enddo
|
||||||
|
first=.false.
|
||||||
|
endif
|
||||||
|
|
||||||
|
sync=0
|
||||||
|
do i=0,6 !Sum over 7 Costas frequencies and
|
||||||
|
i1=i0+i*32 !three Costas arrays
|
||||||
|
i2=i1+36*32
|
||||||
|
i3=i1+72*32
|
||||||
|
csync2=csync(i,1:32)
|
||||||
|
if(itwk.eq.1) csync2=ctwk*csync2 !Tweak the frequency
|
||||||
|
z1=0.
|
||||||
|
z2=0.
|
||||||
|
z3=0.
|
||||||
|
if(i1.ge.1 .and. i1+31.le.NP2) z1=sum(cd0(i1:i1+31)*conjg(csync2))
|
||||||
|
if(i2.ge.1 .and. i2+31.le.NP2) z2=sum(cd0(i2:i2+31)*conjg(csync2))
|
||||||
|
if(i3.ge.1 .and. i3+31.le.NP2) z3=sum(cd0(i3:i3+31)*conjg(csync2))
|
||||||
|
sync = sync + p(z1) + p(z2) + p(z3)
|
||||||
|
enddo
|
||||||
|
|
||||||
|
return
|
||||||
|
end subroutine sync8d
|
||||||
@ -882,9 +882,11 @@ MainWindow::MainWindow(QDir const& temp_directory, bool multiple,
|
|||||||
splashTimer.setSingleShot (true);
|
splashTimer.setSingleShot (true);
|
||||||
splashTimer.start (20 * 1000);
|
splashTimer.start (20 * 1000);
|
||||||
|
|
||||||
|
ui->actionFT8->setEnabled(false);
|
||||||
if(m_config.my_callsign()=="K1JT" or m_config.my_callsign()=="K9AN" or
|
if(m_config.my_callsign()=="K1JT" or m_config.my_callsign()=="K9AN" or
|
||||||
m_config.my_callsign()=="G4WJS" || m_config.my_callsign () == "G3PQA") {
|
m_config.my_callsign()=="G4WJS" || m_config.my_callsign () == "G3PQA") {
|
||||||
ui->actionWSPR_LF->setEnabled(true);
|
ui->actionWSPR_LF->setEnabled(true);
|
||||||
|
ui->actionFT8->setEnabled(true);
|
||||||
}
|
}
|
||||||
if(!ui->cbMenus->isChecked()) {
|
if(!ui->cbMenus->isChecked()) {
|
||||||
ui->cbMenus->setChecked(true);
|
ui->cbMenus->setChecked(true);
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user