mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-12-24 11:40:31 -05:00
Merge branch 'feat-fst280' of bitbucket.org:k1jt/wsjtx into feat-fst280
This commit is contained in:
commit
5b705d54d2
@ -733,7 +733,11 @@ contains
|
||||
write(13,1002) nutc,nint(sync),nsnr,dt,freq,0,decoded0
|
||||
1002 format(i6.6,i4,i5,f6.1,f8.0,i4,3x,a37,' FST240')
|
||||
else
|
||||
if(fmid.ne.-999.0) write(decoded0(16:21),'(f6.3)') w50
|
||||
if(fmid.ne.-999.0) then
|
||||
if(w50.lt.0.95) write(decoded0(18:22),'(f5.3)') w50
|
||||
if(w50.ge.0.95) write(decoded0(18:22),'(f5.2)') w50
|
||||
if(decoded0(18:18).eq.'0') decoded0(18:18)=' '
|
||||
endif
|
||||
write(*,1003) nutc,nsnr,dt,nint(freq),decoded0,annot
|
||||
1003 format(i4.4,i4,f5.1,i5,' ` ',1x,a37,1x,a2,2f7.3)
|
||||
write(13,1004) nutc,nint(sync),nsnr,dt,freq,0,decoded0
|
||||
|
@ -811,88 +811,99 @@ contains
|
||||
end subroutine get_candidates_fst240
|
||||
|
||||
subroutine write_ref(itone,iwave,nsps,nmax,ndown,hmod,i0,fc,fmid,w50)
|
||||
complex cwave(nmax)
|
||||
complex, allocatable :: c(:)
|
||||
real,allocatable :: ss(:)
|
||||
integer itone(160)
|
||||
integer*2 iwave(nmax)
|
||||
integer hmod
|
||||
data ncall/0/
|
||||
save ncall
|
||||
|
||||
ncall=ncall+1
|
||||
allocate(c(0:nmax-1))
|
||||
wave=0
|
||||
fsample=12000.0
|
||||
nsym=160
|
||||
! On "plotspec" special request, compute Doppler spread for a decoded signal
|
||||
|
||||
call gen_fst240wave(itone,nsym,nsps,nmax,fsample,hmod,fc, &
|
||||
1,cwave,wave)
|
||||
cwave=cshift(cwave,-i0*ndown)
|
||||
! do i=1,nmax
|
||||
! write(51,1000) i,iwave(i),cwave(i)
|
||||
!1000 format(2i10,f12.6)
|
||||
! enddo
|
||||
complex, allocatable :: cwave(:) !Reconstructed complex signal
|
||||
complex, allocatable :: g(:) !Channel gain, g(t) in QEX paper
|
||||
real,allocatable :: ss(:) !Computed power spectrum of g(t)
|
||||
integer itone(160) !Tones for this message
|
||||
integer*2 iwave(nmax) !Raw Rx data
|
||||
integer hmod !Modulation index
|
||||
data ncall/0/
|
||||
save ncall
|
||||
|
||||
fac=1.0/32768
|
||||
c=fac*float(iwave)*conjg(cwave)
|
||||
call four2a(c,nmax,1,-1,1) !Forward c2c FFT
|
||||
ncall=ncall+1
|
||||
nfft=2*nmax
|
||||
allocate(cwave(0:nmax-1))
|
||||
allocate(g(0:nfft-1))
|
||||
wave=0
|
||||
fsample=12000.0
|
||||
nsym=160
|
||||
call gen_fst240wave(itone,nsym,nsps,nmax,fsample,hmod,fc,1,cwave,wave)
|
||||
cwave=cshift(cwave,-i0*ndown)
|
||||
fac=1.0/32768
|
||||
g(0:nmax-1)=fac*float(iwave)*conjg(cwave)
|
||||
g(nmax:)=0.
|
||||
call four2a(g,nfft,1,-1,1) !Forward c2c FFT
|
||||
|
||||
df=12000.0/nmax
|
||||
ia=1.0/df
|
||||
smax=0.
|
||||
do i=-ia,ia
|
||||
j=i
|
||||
if(j.lt.0) j=i+nmax
|
||||
s=real(c(j))**2 + aimag(c(j))**2
|
||||
smax=max(s,smax)
|
||||
enddo
|
||||
ia=10.1/df
|
||||
allocate(ss(-ia:ia))
|
||||
sum1=0.
|
||||
sum2=0.
|
||||
ns=0
|
||||
do i=-ia,ia
|
||||
j=i
|
||||
if(j.lt.0) j=i+nmax
|
||||
ss(i)=(real(c(j))**2 + aimag(c(j))**2)/smax
|
||||
f=i*df
|
||||
if(f.ge.-4.0 .and. f.le.-2.0) then
|
||||
sum1=sum1 + ss(i)
|
||||
ns=ns+1
|
||||
else if(f.ge.2.0 .and. f.le.4.0) then
|
||||
sum2=sum2 + ss(i)
|
||||
endif
|
||||
enddo
|
||||
avg=min(sum1/ns,sum2/ns)
|
||||
df=12000.0/nfft
|
||||
ia=1.0/df
|
||||
smax=0.
|
||||
do i=-ia,ia !Find smax in +/- 1 Hz around 0.
|
||||
j=i
|
||||
if(j.lt.0) j=i+nfft
|
||||
s=real(g(j))**2 + aimag(g(j))**2
|
||||
smax=max(s,smax)
|
||||
enddo
|
||||
|
||||
ia=10.1/df
|
||||
allocate(ss(-ia:ia)) !Allocate space for +/- 10 Hz
|
||||
sum1=0.
|
||||
sum2=0.
|
||||
ns=0
|
||||
do i=-ia,ia
|
||||
j=i
|
||||
if(j.lt.0) j=i+nfft
|
||||
ss(i)=(real(g(j))**2 + aimag(g(j))**2)/smax
|
||||
f=i*df
|
||||
if(f.ge.-4.0 .and. f.le.-2.0) then
|
||||
sum1=sum1 + ss(i) !Power between -2 and -4 Hz
|
||||
ns=ns+1
|
||||
else if(f.ge.2.0 .and. f.le.4.0) then
|
||||
sum2=sum2 + ss(i) !Power between +2 and +4 Hz
|
||||
endif
|
||||
enddo
|
||||
avg=min(sum1/ns,sum2/ns) !Compute avg from smaller sum
|
||||
|
||||
sum1=0.
|
||||
do i=-ia,ia
|
||||
f=i*df
|
||||
if(abs(f).le.1.0) sum1=sum1 + ss(i)-avg
|
||||
y=0.99*ss(i) + ncall-1
|
||||
write(52,1010) f,y
|
||||
1010 format(f12.6,f12.6)
|
||||
enddo
|
||||
sum1=0.
|
||||
do i=-ia,ia
|
||||
f=i*df
|
||||
if(abs(f).le.1.0) sum1=sum1 + ss(i)-avg !Power in abs(f) < 1 Hz
|
||||
enddo
|
||||
|
||||
ia=nint(1.0/df)
|
||||
sum2=0.0
|
||||
i1=-999
|
||||
i2=-999
|
||||
i3=-999
|
||||
do i=-ia,ia
|
||||
sum2=sum2 + ss(i)-avg
|
||||
if(sum2.ge.0.25*sum1 .and. i1.eq.-999) i1=i
|
||||
if(sum2.ge.0.50*sum1 .and. i2.eq.-999) i2=i
|
||||
if(sum2.ge.0.75*sum1) then
|
||||
i3=i
|
||||
exit
|
||||
endif
|
||||
enddo
|
||||
fmid=i2*df
|
||||
w50=(i3-i1+1)*df
|
||||
|
||||
return
|
||||
end subroutine write_ref
|
||||
ia=nint(1.0/df) + 1
|
||||
sum2=0.0
|
||||
xi1=-999
|
||||
xi2=-999
|
||||
xi3=-999
|
||||
sum2z=0.
|
||||
do i=-ia,ia !Find freq range that has 50% of signal power
|
||||
sum2=sum2 + ss(i)-avg
|
||||
if(sum2.ge.0.25*sum1 .and. xi1.eq.-999.0) then
|
||||
xi1=i - 1 + (sum2-0.25*sum1)/(sum2-sum2z)
|
||||
endif
|
||||
if(sum2.ge.0.50*sum1 .and. xi2.eq.-999.0) then
|
||||
xi2=i - 1 + (sum2-0.50*sum1)/(sum2-sum2z)
|
||||
endif
|
||||
if(sum2.ge.0.75*sum1) then
|
||||
xi3=i - 1 + (sum2-0.75*sum1)/(sum2-sum2z)
|
||||
exit
|
||||
endif
|
||||
sum2z=sum2
|
||||
enddo
|
||||
xdiff=sqrt(1.0+(xi3-xi1)**2) !Keep small values from fluctuating too widely
|
||||
w50=xdiff*df !Compute Doppler spread
|
||||
fmid=xi2*df !Frequency midpoint of signal powere
|
||||
|
||||
do i=-ia,ia !Save the spectrum for plotting
|
||||
f=i*df
|
||||
y=0.99*ss(i+nint(xi2)) + ncall-1
|
||||
write(52,1010) f,y
|
||||
1010 format(f12.6,f12.6)
|
||||
enddo
|
||||
|
||||
return
|
||||
end subroutine write_ref
|
||||
|
||||
end module fst240_decode
|
||||
|
Loading…
Reference in New Issue
Block a user