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