mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-21 19:55:20 -05:00
Integrate the new Echo SNR algorithm into WSJT-X.
This commit is contained in:
Joe Taylor
parent
581ef8b6e5
commit
7d8d0b8b94
@ -1,4 +1,4 @@
|
||||
subroutine avecho(id2,ndop,nfrit,nqual,f1,xlevel,sigdb,snr,dfreq,width)
|
||||
subroutine avecho(id2,ndop,nfrit,nqual,f1,xlevel,snrdb,db_err,dfreq,width)
|
||||
|
||||
integer TXLENGTH
|
||||
parameter (TXLENGTH=27648) !27*1024
|
||||
@ -13,11 +13,22 @@ subroutine avecho(id2,ndop,nfrit,nqual,f1,xlevel,sigdb,snr,dfreq,width)
|
||||
real s(8192)
|
||||
real x(NFFT)
|
||||
integer ipkv(1)
|
||||
logical ex
|
||||
complex c(0:NH)
|
||||
equivalence (x,c),(ipk,ipkv)
|
||||
common/echocom/nclearave,nsum,blue(NZ),red(NZ)
|
||||
common/echocom2/echo_spread
|
||||
save dop0,sa,sb
|
||||
|
||||
fspread=echo_spread !### Use the predicted Doppler spread ###
|
||||
inquire(file='fspread.txt',exist=ex)
|
||||
if(ex) then
|
||||
open(39,file='fspread.txt',status='old')
|
||||
read(39,*) fspread
|
||||
close(39)
|
||||
endif
|
||||
width=fspread
|
||||
|
||||
dop=ndop
|
||||
sq=0.
|
||||
do i=1,TXLENGTH
|
||||
@ -48,69 +59,28 @@ subroutine avecho(id2,ndop,nfrit,nqual,f1,xlevel,sigdb,snr,dfreq,width)
|
||||
if(ia.gt.7590 .or. ib.gt.7590) go to 900
|
||||
|
||||
nsum=nsum+1
|
||||
|
||||
do i=1,NZ
|
||||
sa(i)=sa(i) + s(ia+i-2048) !Center at initial doppler freq
|
||||
sb(i)=sb(i) + s(ib+i-2048) !Center at expected echo freq
|
||||
enddo
|
||||
|
||||
call pctile(sb,200,50,r0)
|
||||
call pctile(sb(1800),200,50,r1)
|
||||
|
||||
sum=0.
|
||||
sq=0.
|
||||
do i=1,NZ
|
||||
y=r0 + (r1-r0)*(i-100.0)/1800.0
|
||||
blue(i)=sa(i)/y
|
||||
red(i)=sb(i)/y
|
||||
if(i.le.500 .or. i.ge.3597) then
|
||||
sum=sum+red(i)
|
||||
sq=sq + (red(i)-1.0)**2
|
||||
endif
|
||||
enddo
|
||||
ave=sum/1000.0
|
||||
rms=sqrt(sq/1000.0)
|
||||
|
||||
redmax=maxval(red)
|
||||
ipkv=maxloc(red)
|
||||
fac=10.0/max(redmax,10.0)
|
||||
dfreq=(ipk-2048)*df
|
||||
snr=(redmax-ave)/rms
|
||||
|
||||
sigdb=-99.0
|
||||
if(ave.gt.0.0) sigdb=10.0*log10(redmax/ave - 1.0) - 35.7
|
||||
|
||||
nqual=0
|
||||
if(nsum.ge.2 .and. nsum.lt.4) nqual=(snr-4)/5
|
||||
if(nsum.ge.4 .and. nsum.lt.8) nqual=(snr-3)/4
|
||||
if(nsum.ge.8 .and. nsum.lt.12) nqual=(snr-3)/3
|
||||
if(nsum.ge.12) nqual=(snr-2.5)/2.5
|
||||
if(nqual.lt.0) nqual=0
|
||||
call echo_snr(sa,sb,fspread,blue,red,snrdb,db_err,dfreq,snr_detect)
|
||||
nqual=snr_detect-2
|
||||
if(nqual.lt.0) nqual=0
|
||||
if(nqual.gt.10) nqual=10
|
||||
|
||||
! Scale for plotting
|
||||
redmax=maxval(red)
|
||||
fac=10.0/max(redmax,10.0)
|
||||
blue=fac*blue
|
||||
red=fac*red
|
||||
|
||||
sum=0.
|
||||
do i=ipk,ipk+300
|
||||
if(i.gt.NZ) exit
|
||||
if(red(i).lt.1.0) exit
|
||||
sum=sum+(red(i)-1.0)
|
||||
enddo
|
||||
do i=ipk-1,ipk-300,-1
|
||||
if(i.lt.1) exit
|
||||
if(red(i).lt.1.0) exit
|
||||
sum=sum+(red(i)-1.0)
|
||||
enddo
|
||||
bins=sum/(red(ipk)-1.0)
|
||||
width=df*bins
|
||||
nsmo=max(0.0,0.25*bins)
|
||||
|
||||
nsmo=max(0.0,0.25*width/df)
|
||||
do i=1,nsmo
|
||||
call smo121(red,NZ)
|
||||
call smo121(blue,NZ)
|
||||
enddo
|
||||
|
||||
! write(*,3001) snrdb,db_err,dfreq,snr_detect,redmax,nqual,nsmo,nclearave,nsum
|
||||
!3001 format('A',5f10.1,4i4)
|
||||
|
||||
900 return
|
||||
end subroutine avecho
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
subroutine echo_snr(sa,sb,fspread0,blue,red,snrdb,db_err,fpeak,snr_detect)
|
||||
subroutine echo_snr(sa,sb,fspread,blue,red,snrdb,db_err,fpeak,snr_detect)
|
||||
|
||||
parameter (NZ=4096)
|
||||
real sa(NZ)
|
||||
@ -9,33 +9,27 @@ subroutine echo_snr(sa,sb,fspread0,blue,red,snrdb,db_err,fpeak,snr_detect)
|
||||
equivalence (ipk,ipkv)
|
||||
|
||||
df=12000.0/32768.0
|
||||
wh=0.5*fspread0+10.0
|
||||
wh=0.5*fspread+10.0
|
||||
i1=nint((1500.0 - 2.0*wh)/df) - 2048
|
||||
i2=nint((1500.0 - wh)/df) - 2048
|
||||
i3=nint((1500.0 + wh)/df) - 2048
|
||||
i4=nint((1500.0 + 2.0*wh)/df) - 2048
|
||||
|
||||
call pctile(sb(i1),i2-i1,50,r0)
|
||||
call pctile(sb(i3+1),i4-i3,50,r1)
|
||||
scale=(r1-r0)/(0.5*(i3+i4) - 0.5*(i1+i2))
|
||||
do i=1,NZ
|
||||
x=i
|
||||
y=r0 + scale*(i-0.5*(i1+i2))
|
||||
blue(i)=sa(i)/y
|
||||
red(i)=sb(i)/y
|
||||
! write(13,1100) i,i*df+750.0,sb(i),y,red(i)
|
||||
!1100 format(i6,f10.2,2f10.2,f10.6)
|
||||
enddo
|
||||
! call pctile(sb(i1),i2-i1,50,r0)
|
||||
! call pctile(sb(i3+1),i4-i3,50,r1)
|
||||
! ave=0.5*(r0+r1)
|
||||
! blue=sa/ave
|
||||
! red=sb/ave
|
||||
|
||||
! baseline=(sum(sb(i1:i2-1)) + sum(sb(i3+1:i4)))/(i2+i4-i1-i3)
|
||||
! blue=sa/baseline
|
||||
! red=sb/baseline
|
||||
baseline=(sum(sb(i1:i2-1)) + sum(sb(i3+1:i4)))/(i2+i4-i1-i3)
|
||||
blue=sa/baseline
|
||||
red=sb/baseline
|
||||
psig=sum(red(i2:i3)-1.0)
|
||||
pnoise_2500 = 2500.0/df
|
||||
snrdb=db(psig/pnoise_2500)
|
||||
|
||||
smax=0.
|
||||
mh=max(1,nint(0.2*fspread0/df))
|
||||
mh=max(1,nint(0.2*fspread/df))
|
||||
do i=i2,i3
|
||||
ssum=sum(red(i-mh:i+mh))
|
||||
if(ssum.gt.smax) then
|
||||
@ -51,6 +45,7 @@ enddo
|
||||
snr_detect=psig/perr
|
||||
db_err=99.0
|
||||
if(psig.gt.perr) db_err=snrdb - db((psig-perr)/pnoise_2500)
|
||||
if(db_err.lt.0.5) db_err=0.5
|
||||
|
||||
return
|
||||
end subroutine echo_snr
|
||||
|
||||
@ -1529,7 +1529,7 @@ void MainWindow::dataSink(qint64 frames)
|
||||
}
|
||||
if(bCallDecoder) {
|
||||
if(m_mode=="Echo") {
|
||||
float snr=0;
|
||||
float dBerr=0.0;
|
||||
int nfrit=0;
|
||||
int nqual=0;
|
||||
float f1=1500.0;
|
||||
@ -1540,10 +1540,10 @@ void MainWindow::dataSink(qint64 frames)
|
||||
echocom_.nclearave=m_nclearave;
|
||||
int nDop=0;
|
||||
avecho_(dec_data.d2,&nDop,&nfrit,&nqual,&f1,&xlevel,&sigdb,
|
||||
&snr,&dfreq,&width);
|
||||
&dBerr,&dfreq,&width);
|
||||
QString t;
|
||||
t = t.asprintf("%3d %7.1f %7.1f %7.1f %7.1f %3d",echocom_.nsum,xlevel,sigdb,
|
||||
dfreq,width,nqual);
|
||||
t = t.asprintf("%3d %7.1f %7.1f %7.1f %7.1f %7.1f %3d",echocom_.nsum,xlevel,sigdb,
|
||||
dBerr,dfreq,width,nqual);
|
||||
t=QDateTime::currentDateTimeUtc().toString("hh:mm:ss ") + t;
|
||||
if (ui) ui->decodedTextBrowser->appendText(t);
|
||||
if(m_echoGraph->isVisible()) m_echoGraph->plotSpec();
|
||||
@ -6645,7 +6645,7 @@ void MainWindow::on_actionEcho_triggered()
|
||||
m_bFastMode=false;
|
||||
m_bFast9=false;
|
||||
WSPR_config(true);
|
||||
ui->lh_decodes_headings_label->setText(" UTC N Level Sig DF Width Q");
|
||||
ui->lh_decodes_headings_label->setText(" UTC N Level SNR dBerr DF Width Q");
|
||||
// 01234567890123456789012345678901234567
|
||||
displayWidgets(nWidgets("00000000000000000000001000000000000000"));
|
||||
fast_config(false);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user