mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-22 04:11:16 -05:00
Move q65_dec0 into q65 module.
This commit is contained in:
Joe Taylor
parent
bfca40aa1c
commit
f0808942e5
@ -498,7 +498,6 @@ set (wsjt_FSRCS
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lib/prog_args.f90
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lib/ps4.f90
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lib/qra/q65/q65_ap.f90
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lib/qra/q65/q65_dec0.f90
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lib/qra/q65/q65_loops.f90
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lib/qra/q65/q65_set_list.f90
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lib/refspectrum.f90
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@ -15,6 +15,184 @@ module q65
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contains
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subroutine q65_dec0(nutc,iwave,ntrperiod,nfqso,ntol,ndepth,lclearave, &
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emedelay,xdt,f0,snr1,width,dat4,snr2,idec)
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! Detect and align with the Q65 sync vector, returning time and frequency
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! offsets and SNR estimate.
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! Input: iwave(0:nmax-1) Raw data
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! mode_q65 Tone spacing 1 2 4 8 16 (A-E)
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! nsps Samples per symbol at 12000 Sa/s
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! nfqso Target frequency (Hz)
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! ntol Search range around nfqso (Hz)
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! Output: xdt Time offset from nominal (s)
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! f0 Frequency of sync tone
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! snr1 Relative SNR of sync signal
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use packjt77
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use timer_module, only: timer
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parameter (LN=2176*63) !LN=LL*NN; LL=64*(mode_q65+2), NN=63
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integer*2 iwave(0:12000*ntrperiod-1) !Raw data
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integer dat4(13)
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integer ijpk(2)
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character*37 decoded
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logical first,lclearave
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real, allocatable :: s1(:,:) !Symbol spectra, 1/8-symbol steps
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real, allocatable :: s3(:,:) !Data-symbol energies s3(LL,63)
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real, allocatable :: ccf(:,:) !CCF(freq,lag)
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real, allocatable :: ccf1(:) !CCF(freq) at best lag
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real, allocatable :: ccf2(:) !CCF(freq) at any lag
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data first/.true./
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save first
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if(nutc+ndepth.eq.-999) stop
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irc=-2
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idec=-1
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snr1=0.
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dat4=0
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LL=64*(2+mode_q65)
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nfft=nsps
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df=12000.0/nfft !Freq resolution = baud
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istep=nsps/NSTEP
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iz=5000.0/df !Uppermost frequency bin, at 5000 Hz
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txt=85.0*nsps/12000.0
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jz=(txt+1.0)*12000.0/istep !Number of quarter-symbol steps
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if(nsps.ge.6912) jz=(txt+2.0)*12000.0/istep !For TR 60 s and higher
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ia=ntol/df
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ia2=max(ia,10*mode_q65,nint(100.0/df))
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nsmo=int(0.7*mode_q65*mode_q65)
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if(nsmo.lt.1) nsmo=1
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! nsmo=1 !### TEMPORARY ###
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allocate(s1(iz,jz))
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allocate(s3(-64:LL-65,63))
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allocate(ccf(-ia2:ia2,-53:214))
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allocate(ccf1(-ia2:ia2))
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allocate(ccf2(-ia2:ia2))
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if(LL.ne.LL0 .or. lclearave) then
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if(allocated(s1a)) deallocate(s1a)
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allocate(s1a(iz,jz))
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s1a=0.
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navg=0
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LL0=LL
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endif
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s3=0.
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if(first) then !Generate the sync vector
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sync=-22.0/63.0 !Sync tone OFF
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do k=1,22
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sync(isync(k))=1.0 !Sync tone ON
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enddo
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endif
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call timer('s1 ',0)
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! Compute spectra with symbol length and NSTEP time bins per symbol.
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call q65_symspec(iwave,ntrperiod*12000,iz,jz,s1)
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call timer('s1 ',1)
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i0=nint(nfqso/df) !Target QSO frequency
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if(i0-64.lt.1 .or. i0-65+LL.gt.iz) go to 900 !Frequency out of range
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call pctile(s1(i0-64:i0-65+LL,1:jz),LL*jz,40,base)
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s1=s1/base
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! Apply fast AGC
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s1max=20.0 !Empirical choice
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do j=1,jz !### Maybe wrong way? ###
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smax=maxval(s1(i0-64:i0-65+LL,j))
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if(smax.gt.s1max) s1(i0-64:i0-65+LL,j)=s1(i0-64:i0-65+LL,j)*s1max/smax
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enddo
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dtstep=nsps/(NSTEP*12000.0) !Step size in seconds
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lag1=-1.0/dtstep
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lag2=1.0/dtstep + 0.9999
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if(nsps.ge.3600 .and. emedelay.gt.0) lag2=4.0/dtstep + 0.9999 !Include EME
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j0=0.5/dtstep
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if(nsps.ge.7200) j0=1.0/dtstep !Nominal start-signal index
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idec=-1
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dat4=0
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if(ncw.gt.0) then
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! Try list decoding via "Deep Likelihood".
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call timer('list_dec',0)
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call q65_dec_q3(df,s1,iz,jz,ia,lag1,lag2,i0,j0,ccf,ccf1,ccf2, &
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ia2,s3,LL,nfqso,dtstep,xdt,f0,snr2,dat4,idec,decoded)
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call timer('list_dec',1)
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endif
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!######################################################################
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! Get 2d CCF and ccf2 using sync symbols only
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ccf=0.
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call timer('2dccf ',0)
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do lag=lag1,lag2
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do k=1,85
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n=NSTEP*(k-1) + 1
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j=n+lag+j0
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if(j.ge.1 .and. j.le.jz) then
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do i=-ia2,ia2
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if(i0+i.lt.1 .or. i0+i.gt.iz) cycle
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ccf(i,lag)=ccf(i,lag) + sync(k)*s1(i0+i,j)
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enddo
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endif
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enddo
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enddo
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do i=-ia2,ia2
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ccf2(i)=maxval(ccf(i,:))
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enddo
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! Estimate rms on ccf baseline
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ijpk=maxloc(ccf(-ia:ia,:))
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ipk=ijpk(1)-ia-1
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jpk=ijpk(2)-53-1
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sq=0.
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nsq=0
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jd=(lag2-lag1)/4
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do i=-ia2,ia2
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do j=lag1,lag2
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if(abs(j-jpk).gt.jd .and. abs(i-ipk).gt.ia/2) then
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sq=sq + ccf(i,j)**2
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nsq=nsq+1
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endif
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enddo
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enddo
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rms=sqrt(sq/nsq)
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smax=ccf(ipk,jpk)
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snr1=smax/rms
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ccf2=ccf2/rms
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if(snr1.gt.10.0) ccf2=(10.0/snr1)*ccf2
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call timer('2dccf ',1)
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if(idec.le.0) then
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! The q3 decode attempt failed, so we'll try a more general decode.
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f0=nfqso + ipk*df
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xdt=jpk*dtstep
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ccf1=ccf(:,jpk)/rms
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if(snr1.gt.10.0) ccf1=(10.0/snr1)*ccf1
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call q65_s1_to_s3(s1,iz,jz,i0,j0,ipk,jpk,LL,mode_q65,sync,s3)
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endif
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smax=maxval(ccf1)
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i1=-9999
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i2=-9999
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do i=-ia,ia
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if(i1.eq.-9999 .and. ccf1(i).ge.0.5*smax) i1=i
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if(i2.eq.-9999 .and. ccf1(-i).ge.0.5*smax) i2=-i
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enddo
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width=df*(i2-i1)
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! Write data for the red and orange sync curves.
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do i=-ia2,ia2
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freq=nfqso + i*df
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write(17,1100) freq,ccf1(i),xdt,ccf2(i)
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1100 format(4f10.3)
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enddo
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close(17)
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900 return
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end subroutine q65_dec0
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subroutine q65_clravg
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s1a=0.
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@ -1,178 +0,0 @@
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subroutine q65_dec0(nutc,iwave,ntrperiod,nfqso,ntol,ndepth,lclearave, &
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emedelay,xdt,f0,snr1,width,dat4,snr2,idec)
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! Detect and align with the Q65 sync vector, returning time and frequency
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! offsets and SNR estimate.
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! Input: iwave(0:nmax-1) Raw data
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! mode_q65 Tone spacing 1 2 4 8 16 (A-E)
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! nsps Samples per symbol at 12000 Sa/s
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! nfqso Target frequency (Hz)
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! ntol Search range around nfqso (Hz)
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! Output: xdt Time offset from nominal (s)
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! f0 Frequency of sync tone
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! snr1 Relative SNR of sync signal
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use packjt77
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use timer_module, only: timer
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use q65
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parameter (LN=2176*63) !LN=LL*NN; LL=64*(mode_q65+2), NN=63
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integer*2 iwave(0:12000*ntrperiod-1) !Raw data
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integer dat4(13)
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integer ijpk(2)
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character*37 decoded
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logical first,lclearave
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real, allocatable :: s1(:,:) !Symbol spectra, 1/8-symbol steps
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real, allocatable :: s3(:,:) !Data-symbol energies s3(LL,63)
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real, allocatable :: ccf(:,:) !CCF(freq,lag)
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real, allocatable :: ccf1(:) !CCF(freq) at best lag
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real, allocatable :: ccf2(:) !CCF(freq) at any lag
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data first/.true./
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save first
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if(nutc+ndepth.eq.-999) stop
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irc=-2
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idec=-1
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snr1=0.
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dat4=0
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LL=64*(2+mode_q65)
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nfft=nsps
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df=12000.0/nfft !Freq resolution = baud
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istep=nsps/NSTEP
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iz=5000.0/df !Uppermost frequency bin, at 5000 Hz
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txt=85.0*nsps/12000.0
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jz=(txt+1.0)*12000.0/istep !Number of quarter-symbol steps
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if(nsps.ge.6912) jz=(txt+2.0)*12000.0/istep !For TR 60 s and higher
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ia=ntol/df
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ia2=max(ia,10*mode_q65,nint(100.0/df))
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nsmo=int(0.7*mode_q65*mode_q65)
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if(nsmo.lt.1) nsmo=1
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! nsmo=1 !### TEMPORARY ###
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allocate(s1(iz,jz))
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allocate(s3(-64:LL-65,63))
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allocate(ccf(-ia2:ia2,-53:214))
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allocate(ccf1(-ia2:ia2))
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allocate(ccf2(-ia2:ia2))
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if(LL.ne.LL0 .or. lclearave) then
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if(allocated(s1a)) deallocate(s1a)
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allocate(s1a(iz,jz))
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s1a=0.
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navg=0
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LL0=LL
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endif
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s3=0.
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if(first) then !Generate the sync vector
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sync=-22.0/63.0 !Sync tone OFF
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do k=1,22
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sync(isync(k))=1.0 !Sync tone ON
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enddo
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endif
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call timer('s1 ',0)
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! Compute spectra with symbol length and NSTEP time bins per symbol.
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call q65_symspec(iwave,ntrperiod*12000,iz,jz,s1)
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call timer('s1 ',1)
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i0=nint(nfqso/df) !Target QSO frequency
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if(i0-64.lt.1 .or. i0-65+LL.gt.iz) go to 900 !Frequency out of range
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call pctile(s1(i0-64:i0-65+LL,1:jz),LL*jz,40,base)
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s1=s1/base
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! Apply fast AGC
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s1max=20.0 !Empirical choice
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do j=1,jz !### Maybe wrong way? ###
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smax=maxval(s1(i0-64:i0-65+LL,j))
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if(smax.gt.s1max) s1(i0-64:i0-65+LL,j)=s1(i0-64:i0-65+LL,j)*s1max/smax
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enddo
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dtstep=nsps/(NSTEP*12000.0) !Step size in seconds
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lag1=-1.0/dtstep
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lag2=1.0/dtstep + 0.9999
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if(nsps.ge.3600 .and. emedelay.gt.0) lag2=4.0/dtstep + 0.9999 !Include EME
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j0=0.5/dtstep
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if(nsps.ge.7200) j0=1.0/dtstep !Nominal start-signal index
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idec=-1
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dat4=0
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if(ncw.gt.0) then
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! Try list decoding via "Deep Likelihood".
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call timer('list_dec',0)
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call q65_dec_q3(df,s1,iz,jz,ia,lag1,lag2,i0,j0,ccf,ccf1,ccf2, &
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ia2,s3,LL,nfqso,dtstep,xdt,f0,snr2,dat4,idec,decoded)
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call timer('list_dec',1)
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endif
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!######################################################################
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! Get 2d CCF and ccf2 using sync symbols only
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ccf=0.
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call timer('2dccf ',0)
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do lag=lag1,lag2
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do k=1,85
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n=NSTEP*(k-1) + 1
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j=n+lag+j0
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if(j.ge.1 .and. j.le.jz) then
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do i=-ia2,ia2
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if(i0+i.lt.1 .or. i0+i.gt.iz) cycle
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ccf(i,lag)=ccf(i,lag) + sync(k)*s1(i0+i,j)
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enddo
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endif
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enddo
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enddo
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do i=-ia2,ia2
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ccf2(i)=maxval(ccf(i,:))
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enddo
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! Estimate rms on ccf baseline
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ijpk=maxloc(ccf(-ia:ia,:))
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ipk=ijpk(1)-ia-1
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jpk=ijpk(2)-53-1
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sq=0.
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nsq=0
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jd=(lag2-lag1)/4
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do i=-ia2,ia2
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do j=lag1,lag2
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if(abs(j-jpk).gt.jd .and. abs(i-ipk).gt.ia/2) then
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sq=sq + ccf(i,j)**2
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nsq=nsq+1
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endif
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enddo
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enddo
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rms=sqrt(sq/nsq)
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smax=ccf(ipk,jpk)
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snr1=smax/rms
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ccf2=ccf2/rms
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if(snr1.gt.10.0) ccf2=(10.0/snr1)*ccf2
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call timer('2dccf ',1)
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if(idec.le.0) then
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! The q3 decode attempt failed, so we'll try a more general decode.
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f0=nfqso + ipk*df
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xdt=jpk*dtstep
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ccf1=ccf(:,jpk)/rms
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if(snr1.gt.10.0) ccf1=(10.0/snr1)*ccf1
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call q65_s1_to_s3(s1,iz,jz,i0,j0,ipk,jpk,LL,mode_q65,sync,s3)
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endif
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smax=maxval(ccf1)
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i1=-9999
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i2=-9999
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do i=-ia,ia
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if(i1.eq.-9999 .and. ccf1(i).ge.0.5*smax) i1=i
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if(i2.eq.-9999 .and. ccf1(-i).ge.0.5*smax) i2=-i
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enddo
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width=df*(i2-i1)
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! Write data for the red and orange sync curves.
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do i=-ia2,ia2
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freq=nfqso + i*df
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write(17,1100) freq,ccf1(i),xdt,ccf2(i)
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1100 format(4f10.3)
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enddo
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close(17)
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900 return
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end subroutine q65_dec0
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