mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-25 05:38:46 -05:00
Include h=8 and NSS=40 in the FST280 decoder.
This commit is contained in:
Joe Taylor
parent
70441a9b4a
commit
5aeaf5dc78
@ -189,10 +189,11 @@ subroutine multimode_decoder(ss,id2,params,nfsample)
|
||||
|
||||
if(params%nmode.eq.280) then
|
||||
! We're in FST280/FST280W mode
|
||||
call timer('decfst28',0)
|
||||
call timer('dec280 ',0)
|
||||
ntrperiod=params%kin/12000
|
||||
call my_fst280%decode(fst280_decoded,id2,params%nQSOProgress, &
|
||||
params%nfqso,params%nfa,params%nfb,params%ndepth)
|
||||
call timer('decfst28',1)
|
||||
params%nfqso,params%nfa,params%nfb,params%ndepth,ntrperiod)
|
||||
call timer('dec280 ',1)
|
||||
go to 800
|
||||
endif
|
||||
|
||||
|
||||
@ -24,7 +24,7 @@ module fst280_decode
|
||||
contains
|
||||
|
||||
subroutine decode(this,callback,iwave,nQSOProgress,nfqso, &
|
||||
nfa,nfb,ndepth)
|
||||
nfa,nfb,ndepth,ntrperiod)
|
||||
|
||||
use timer_module, only: timer
|
||||
use packjt77
|
||||
@ -43,18 +43,388 @@ contains
|
||||
real llr(280),llra(280),llrb(280),llrc(280),llrd(280)
|
||||
real candidates(100,3)
|
||||
real bitmetrics(328,4)
|
||||
integer ihdr(11)
|
||||
integer hmod,ihdr(11)
|
||||
integer*1 apmask(280),cw(280)
|
||||
integer*1 hbits(328)
|
||||
integer*1 message101(101),message74(74)
|
||||
logical badsync,unpk77_success
|
||||
integer*2 iwave(300*12000)
|
||||
|
||||
write(*,3001) nQSOProgress,nfqso,nfa,nfb,ndepth
|
||||
3001 format('aaa',5i5)
|
||||
hmod=1 !### pass as arg ###
|
||||
Keff=91
|
||||
ndeep=3
|
||||
iwspr=0
|
||||
|
||||
nmax=15*12000
|
||||
if(ntrperiod.eq.15) then
|
||||
nsps=800
|
||||
nmax=15*12000
|
||||
ndown=20/hmod
|
||||
if(hmod.eq.8) ndown=2
|
||||
else if(ntrperiod.eq.30) then
|
||||
nsps=1680
|
||||
nmax=30*12000
|
||||
ndown=42/hmod
|
||||
if(hmod.eq.4) ndown=10
|
||||
if(hmod.eq.8) ndown=5
|
||||
else if(ntrperiod.eq.60) then
|
||||
nsps=4000
|
||||
nmax=60*12000
|
||||
ndown=100/hmod
|
||||
if(hmod.eq.8) ndown=16
|
||||
else if(ntrperiod.eq.120) then
|
||||
nsps=8400
|
||||
nmax=120*12000
|
||||
ndown=200/hmod
|
||||
else if(ntrperiod.eq.300) then
|
||||
nsps=21504
|
||||
nmax=300*12000
|
||||
ndown=512/hmod
|
||||
end if
|
||||
nss=nsps/ndown
|
||||
fs=12000.0 !Sample rate
|
||||
fs2=fs/ndown
|
||||
nspsec=nint(fs2)
|
||||
dt=1.0/fs !Sample interval (s)
|
||||
dt2=1.0/fs2
|
||||
tt=nsps*dt !Duration of "itone" symbols (s)
|
||||
|
||||
nfft1=2*int(nmax/2)
|
||||
nh1=nfft1/2
|
||||
allocate( r_data(1:nfft1+2) )
|
||||
allocate( c_bigfft(0:nfft1/2) )
|
||||
|
||||
nfft2=nfft1/ndown
|
||||
allocate( c2(0:nfft2-1) )
|
||||
allocate( cframe(0:164*nss-1) )
|
||||
|
||||
ngood=0
|
||||
ngoodsync=0
|
||||
npts=nmax
|
||||
fa=100.0
|
||||
fb=3500.0
|
||||
|
||||
! The big fft is done once and is used for calculating the smoothed spectrum
|
||||
! and also for downconverting/downsampling each candidate.
|
||||
r_data(1:nfft1)=iwave(1:nfft1)
|
||||
r_data(nfft1+1:nfft1+2)=0.0
|
||||
call four2a(r_data,nfft1,1,-1,0)
|
||||
c_bigfft=cmplx(r_data(1:nfft1+2:2),r_data(2:nfft1+2:2))
|
||||
|
||||
! Get first approximation of candidate frequencies
|
||||
call get_candidates_fst280(c_bigfft,nfft1,nsps,hmod,fs,fa,fb, &
|
||||
ncand,candidates)
|
||||
|
||||
ndecodes=0
|
||||
isbest1=0
|
||||
isbest8=0
|
||||
fc21=fc0
|
||||
fc28=fc0
|
||||
do icand=1,ncand
|
||||
fc0=candidates(icand,1)
|
||||
xsnr=candidates(icand,2)
|
||||
|
||||
! Downconvert and downsample a slice of the spectrum centered on the
|
||||
! rough estimate of the candidates frequency.
|
||||
! Output array c2 is complex baseband sampled at 12000/ndown Sa/sec.
|
||||
! The size of the downsampled c2 array is nfft2=nfft1/ndown
|
||||
|
||||
call fst280_downsample(c_bigfft,nfft1,ndown,fc0,c2)
|
||||
|
||||
call timer('sync280 ',0)
|
||||
do isync=0,1
|
||||
if(isync.eq.0) then
|
||||
fc1=0.0
|
||||
is0=nint(fs2)
|
||||
ishw=is0
|
||||
isst=4
|
||||
ifhw=10
|
||||
df=.1*8400/nsps
|
||||
else if(isync.eq.1) then
|
||||
fc1=fc28
|
||||
is0=isbest8
|
||||
ishw=4
|
||||
isst=1
|
||||
ifhw=10
|
||||
df=.02*8400/nsps
|
||||
endif
|
||||
|
||||
smax1=0.0
|
||||
smax8=0.0
|
||||
do if=-ifhw,ifhw
|
||||
fc=fc1+df*if
|
||||
do istart=max(1,is0-ishw),is0+ishw,isst
|
||||
call sync_fst280(c2,istart,fc,hmod,1,nfft2,nss,fs2,sync1)
|
||||
call sync_fst280(c2,istart,fc,hmod,8,nfft2,nss,fs2,sync8)
|
||||
if(sync8.gt.smax8) then
|
||||
fc28=fc
|
||||
isbest8=istart
|
||||
smax8=sync8
|
||||
endif
|
||||
if(sync1.gt.smax1) then
|
||||
fc21=fc
|
||||
isbest1=istart
|
||||
smax1=sync1
|
||||
endif
|
||||
enddo
|
||||
enddo
|
||||
enddo
|
||||
call timer('sync280 ',1)
|
||||
|
||||
if(smax8/smax1 .lt. 0.65 ) then
|
||||
fc2=fc21
|
||||
isbest=isbest1
|
||||
ntmax=4
|
||||
if(hmod.gt.1) ntmax=1
|
||||
ntmin=1
|
||||
njitter=2
|
||||
else
|
||||
fc2=fc28
|
||||
isbest=isbest8
|
||||
ntmax=4
|
||||
if(hmod.gt.1) ntmax=1
|
||||
ntmin=1
|
||||
njitter=2
|
||||
endif
|
||||
fc_synced = fc0 + fc2
|
||||
dt_synced = (isbest-fs2)*dt2 !nominal dt is 1 second so frame starts at sample fs2
|
||||
|
||||
call fst280_downsample(c_bigfft,nfft1,ndown,fc_synced,c2)
|
||||
|
||||
if(abs((isbest-fs2)/nss) .lt. 0.2 .and. abs(fc_synced-1500.0).lt.0.4) then
|
||||
ngoodsync=ngoodsync+1
|
||||
endif
|
||||
|
||||
do ijitter=0,2
|
||||
if(ijitter.eq.0) ioffset=0
|
||||
if(ijitter.eq.1) ioffset=1
|
||||
if(ijitter.eq.2) ioffset=-1
|
||||
is0=isbest+ioffset
|
||||
if(is0.lt.0) cycle
|
||||
cframe=c2(is0:is0+164*nss-1)
|
||||
s2=sum(cframe*conjg(cframe))
|
||||
cframe=cframe/sqrt(s2)
|
||||
call get_fst280_bitmetrics(cframe,nss,hmod,bitmetrics,badsync)
|
||||
|
||||
hbits=0
|
||||
where(bitmetrics(:,1).ge.0) hbits=1
|
||||
ns1=count(hbits( 1: 8).eq.(/0,0,0,1,1,0,1,1/))
|
||||
ns2=count(hbits( 9: 16).eq.(/0,1,0,0,1,1,1,0/))
|
||||
ns3=count(hbits(157:164).eq.(/0,0,0,1,1,0,1,1/))
|
||||
ns4=count(hbits(165:172).eq.(/0,1,0,0,1,1,1,0/))
|
||||
ns5=count(hbits(313:320).eq.(/0,0,0,1,1,0,1,1/))
|
||||
ns6=count(hbits(321:328).eq.(/0,1,0,0,1,1,1,0/))
|
||||
nsync_qual=ns1+ns2+ns3+ns4+ns5+ns6
|
||||
! if(nsync_qual.lt. 20) cycle
|
||||
|
||||
scalefac=2.83
|
||||
llra( 1:140)=bitmetrics( 17:156, 1)
|
||||
llra(141:280)=bitmetrics(173:312, 1)
|
||||
llra=scalefac*llra
|
||||
llrb( 1:140)=bitmetrics( 17:156, 2)
|
||||
llrb(141:280)=bitmetrics(173:312, 2)
|
||||
llrb=scalefac*llrb
|
||||
llrc( 1:140)=bitmetrics( 17:156, 3)
|
||||
llrc(141:280)=bitmetrics(173:312, 3)
|
||||
llrc=scalefac*llrc
|
||||
llrd( 1:140)=bitmetrics( 17:156, 4)
|
||||
llrd(141:280)=bitmetrics(173:312, 4)
|
||||
llrd=scalefac*llrd
|
||||
apmask=0
|
||||
|
||||
do itry=ntmax,ntmin,-1
|
||||
if(itry.eq.1) llr=llra
|
||||
if(itry.eq.2) llr=llrb
|
||||
if(itry.eq.3) llr=llrc
|
||||
if(itry.eq.4) llr=llrd
|
||||
dmin=0.0
|
||||
nharderrors=-1
|
||||
unpk77_success=.false.
|
||||
if(iwspr.eq.0) then
|
||||
maxosd=2
|
||||
call timer('d280_101',0)
|
||||
call decode280_101(llr,Keff,maxosd,ndeep,apmask,message101, &
|
||||
cw,ntype,nharderrors,dmin)
|
||||
call timer('d280_101',1)
|
||||
else
|
||||
maxosd=2
|
||||
call timer('d280_74 ',0)
|
||||
call decode280_74(llr,Keff,maxosd,ndeep,apmask,message74,cw, &
|
||||
ntype,nharderrors,dmin)
|
||||
call timer('d280_74 ',1)
|
||||
endif
|
||||
if(nharderrors .ge.0) then
|
||||
if(iwspr.eq.0) then
|
||||
write(c77,'(77i1)') message101(1:77)
|
||||
call unpack77(c77,0,msg,unpk77_success)
|
||||
else
|
||||
write(c77,'(50i1)') message74(1:50)
|
||||
c77(51:77)='000000000000000000000110000'
|
||||
call unpack77(c77,0,msg,unpk77_success)
|
||||
endif
|
||||
if(nharderrors .ge.0 .and. unpk77_success) then
|
||||
ngood=ngood+1
|
||||
write(*,1100) 0,nint(xsnr),dt_synced,nint(fc_synced),msg(1:22)
|
||||
1100 format(i6.6,i5,f5.1,i5,' `',1x,a22)
|
||||
goto 2002
|
||||
else
|
||||
cycle
|
||||
endif
|
||||
endif
|
||||
enddo ! metrics
|
||||
enddo ! istart jitter
|
||||
2002 continue
|
||||
enddo !candidate list
|
||||
write(*,1120)
|
||||
1120 format("<DecodeFinished>")
|
||||
|
||||
return
|
||||
end subroutine decode
|
||||
|
||||
subroutine sync_fst280(cd0,i0,f0,hmod,ncoh,np,nss,fs,sync)
|
||||
|
||||
! Compute sync power for a complex, downsampled FST280 signal.
|
||||
|
||||
include 'fst280/fst280_params.f90'
|
||||
complex cd0(0:np-1)
|
||||
complex, allocatable, save :: csync(:)
|
||||
complex, allocatable, save :: csynct(:)
|
||||
complex ctwk(8*nss)
|
||||
complex z1,z2,z3
|
||||
logical first
|
||||
integer hmod,isyncword(0:7)
|
||||
real f0save
|
||||
data isyncword/0,1,3,2,1,0,2,3/
|
||||
data first/.true./
|
||||
data f0save/0.0/
|
||||
save first,twopi,dt,fac,f0save
|
||||
|
||||
p(z1)=(real(z1*fac)**2 + aimag(z1*fac)**2)**0.5 !Statement function for power
|
||||
|
||||
if( first ) then
|
||||
allocate( csync(8*nss) )
|
||||
allocate( csynct(8*nss) )
|
||||
twopi=8.0*atan(1.0)
|
||||
dt=1/fs
|
||||
k=1
|
||||
phi=0.0
|
||||
do i=0,7
|
||||
dphi=twopi*hmod*(isyncword(i)-1.5)/real(nss)
|
||||
do j=1,nss
|
||||
csync(k)=cmplx(cos(phi),sin(phi))
|
||||
phi=mod(phi+dphi,twopi)
|
||||
k=k+1
|
||||
enddo
|
||||
enddo
|
||||
first=.false.
|
||||
fac=1.0/(8.0*nss)
|
||||
endif
|
||||
|
||||
if(f0.ne.f0save) then
|
||||
dphi=twopi*f0*dt
|
||||
phi=0.0
|
||||
do i=1,8*nss
|
||||
ctwk(i)=cmplx(cos(phi),sin(phi))
|
||||
phi=mod(phi+dphi,twopi)
|
||||
enddo
|
||||
csynct=ctwk*csync
|
||||
f0save=f0
|
||||
endif
|
||||
|
||||
i1=i0 !Costas arrays
|
||||
i2=i0+78*nss
|
||||
i3=i0+156*nss
|
||||
|
||||
s1=0.0
|
||||
s2=0.0
|
||||
s3=0.0
|
||||
nsec=8/ncoh
|
||||
do i=1,nsec
|
||||
is=(i-1)*ncoh*nss
|
||||
z1=sum(cd0(i1+is:i1+is+ncoh*nss-1)*conjg(csynct(is+1:is+ncoh*nss)))
|
||||
z2=sum(cd0(i2+is:i2+is+ncoh*nss-1)*conjg(csynct(is+1:is+ncoh*nss)))
|
||||
z3=sum(cd0(i3+is:i3+is+ncoh*nss-1)*conjg(csynct(is+1:is+ncoh*nss)))
|
||||
s1=s1+abs(z1)/(8*nss)
|
||||
s2=s2+abs(z2)/(8*nss)
|
||||
s3=s3+abs(z3)/(8*nss)
|
||||
enddo
|
||||
|
||||
sync = s1+s2+s3
|
||||
|
||||
return
|
||||
end subroutine sync_fst280
|
||||
|
||||
subroutine fst280_downsample(c_bigfft,nfft1,ndown,f0,c1)
|
||||
|
||||
! Output: Complex data in c(), sampled at 12000/ndown Hz
|
||||
|
||||
complex c_bigfft(0:nfft1/2)
|
||||
complex c1(0:nfft1/ndown-1)
|
||||
|
||||
df=12000.0/nfft1
|
||||
i0=nint(f0/df)
|
||||
c1(0)=c_bigfft(i0)
|
||||
nfft2=nfft1/ndown
|
||||
do i=1,nfft2/2
|
||||
if(i0+i.le.nfft1/2) c1(i)=c_bigfft(i0+i)
|
||||
if(i0-i.ge.0) c1(nfft2-i)=c_bigfft(i0-i)
|
||||
enddo
|
||||
c1=c1/nfft2
|
||||
call four2a(c1,nfft2,1,1,1) !c2c FFT back to time domain
|
||||
return
|
||||
|
||||
end subroutine fst280_downsample
|
||||
|
||||
subroutine get_candidates_fst280(c_bigfft,nfft1,nsps,hmod,fs,fa,fb, &
|
||||
ncand,candidates)
|
||||
|
||||
complex c_bigfft(0:nfft1/2)
|
||||
integer hmod
|
||||
real candidates(100,3)
|
||||
real s(18000)
|
||||
real s2(18000)
|
||||
data nfft1z/-1/
|
||||
save nfft1z
|
||||
|
||||
nh1=nfft1/2
|
||||
df1=fs/nfft1
|
||||
baud=fs/nsps
|
||||
df2=baud/2.0
|
||||
nd=df1/df2
|
||||
ndh=nd/2
|
||||
ia=fa/df2
|
||||
ib=fb/df2
|
||||
s=0.
|
||||
do i=ia,ib
|
||||
j0=nint(i*df2/df1)
|
||||
do j=j0-ndh,j0+ndh
|
||||
s(i)=s(i) + real(c_bigfft(j))**2 + aimag(c_bigfft(j))**2
|
||||
enddo
|
||||
enddo
|
||||
call pctile(s(ia:ib),ib-ia+1,30,base)
|
||||
s=s/base
|
||||
nh=hmod
|
||||
do i=ia,ib
|
||||
s2(i)=s(i-nh*3) + s(i-nh) +s(i+nh) +s(i+nh*3)
|
||||
s2(i)=db(s2(i)) - 48.5
|
||||
enddo
|
||||
|
||||
if(hmod.eq.1) thresh=-29.5 !### temporaray? ###
|
||||
if(hmod.eq.2) thresh=-27.0
|
||||
if(hmid.eq.4) thresh=-25.0
|
||||
|
||||
ncand=0
|
||||
do i=ia,ib
|
||||
if((s2(i).gt.s2(i-1)).and. &
|
||||
(s2(i).gt.s2(i+1)).and. &
|
||||
(s2(i).gt.thresh).and.ncand.lt.100) then
|
||||
ncand=ncand+1
|
||||
candidates(ncand,1)=df2*i
|
||||
candidates(ncand,2)=s2(i)
|
||||
endif
|
||||
enddo
|
||||
|
||||
return
|
||||
end subroutine get_candidates_fst280
|
||||
|
||||
end module fst280_decode
|
||||
|
||||
@ -1393,7 +1393,6 @@ void MainWindow::dataSink(qint64 frames)
|
||||
if(m_mode=="MSK144") return;
|
||||
|
||||
fixStop();
|
||||
qDebug() << "aa" << m_hsymStop << m_ihsym << m_TRperiod;
|
||||
if (m_mode == "FreqCal"
|
||||
// only calculate after 1st chunk, also skip chunk where rig
|
||||
// changed frequency
|
||||
|
||||
Loading…
Reference in New Issue
Block a user