mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2025-03-26 14:08:40 -04:00
151 lines
4.7 KiB
Fortran
151 lines
4.7 KiB
Fortran
subroutine q65b(nutc,nqd,fcenter,nfcal,nfsample,ikhz,mousedf,ntol, &
|
|
ntrperiod,iseq,mycall0,hiscall0,hisgrid,mode_q65,f0,fqso,nkhz_center, &
|
|
newdat,nagain,bClickDecode,max_drift,offset,ndepth,datetime,nCFOM, &
|
|
ndop00,idec)
|
|
|
|
! This routine provides an interface between QMAP and the Q65 decoder
|
|
! in WSJT-X. All arguments are input data obtained from the QMAP GUI.
|
|
! Raw Rx data are available as the 96 kHz complex spectrum ca(MAXFFT1)
|
|
! in common/cacb. Decoded messages are sent back to the GUI.
|
|
|
|
use q65_decode
|
|
use timer_module, only: timer
|
|
|
|
parameter (MAXFFT1=5376000) !56*96000
|
|
parameter (MAXFFT2=336000) !56*6000 (downsampled by 1/16)
|
|
parameter (NMAX=60*12000)
|
|
parameter (RAD=57.2957795)
|
|
integer*2 iwave(60*12000)
|
|
integer offset
|
|
complex ca(MAXFFT1) !FFT of raw I/Q data from Linrad
|
|
complex cx(0:MAXFFT2-1),cz(0:MAXFFT2)
|
|
real*8 fcenter,freq0,freq1
|
|
logical*1 bClickDecode
|
|
character*12 mycall0,hiscall0
|
|
character*12 mycall,hiscall
|
|
character*6 hisgrid
|
|
character*4 grid4
|
|
character*3 csubmode
|
|
character*60 result,ctmp
|
|
character*20 datetime,datetime1
|
|
common/decodes/ndecodes,ncand,nQDecoderDone,nWDecoderBusy, &
|
|
nWTransmitting,result(50)
|
|
common/cacb/ca
|
|
save
|
|
|
|
if(mycall0(1:1).ne.' ') mycall=mycall0
|
|
if(hiscall0(1:1).ne.' ') hiscall=hiscall0
|
|
if(hisgrid(1:4).ne.' ') grid4=hisgrid(1:4)
|
|
|
|
! Find best frequency from sync_dat, the "orange sync curve".
|
|
df3=96000.0/32768.0
|
|
ipk=(1000.0*f0-1.0)/df3
|
|
nfft1=MAXFFT1
|
|
nfft2=MAXFFT2
|
|
df=96000.0/NFFT1
|
|
nh=nfft2/2
|
|
f_mouse=1000.0*(fqso+48.0) + mousedf
|
|
k0=nint((ipk*df3-1000.0)/df)
|
|
if(nagain.eq.1) k0=nint((f_mouse-1000.0)/df)
|
|
|
|
if(k0.lt.nh .or. k0.gt.MAXFFT1-nfft2+1) go to 900
|
|
fac=1.0/nfft2
|
|
cx(0:nfft2-1)=ca(k0:k0+nfft2-1)
|
|
cx=fac*cx
|
|
|
|
! Here cx is frequency-domain data around the selected
|
|
! QSO frequency, taken from the full-length FFT computed in fftbig().
|
|
! Values for fsample, nfft1, nfft2, df, and the downsampled data rate
|
|
! are as follows:
|
|
|
|
! fSample nfft1 df nfft2 fDownSampled
|
|
! (Hz) (Hz) (Hz)
|
|
!----------------------------------------------------
|
|
! 96000 5376000 0.017857143 336000 6000.000
|
|
|
|
cz(0:MAXFFT2-1)=cx
|
|
cz(MAXFFT2)=0.
|
|
! Roll off below 500 Hz and above 2500 Hz.
|
|
ja=nint(500.0/df)
|
|
jb=nint(2500.0/df)
|
|
do i=0,ja
|
|
r=0.5*(1.0+cos(i*3.14159/ja))
|
|
cz(ja-i)=r*cz(ja-i)
|
|
cz(jb+i)=r*cz(jb+i)
|
|
enddo
|
|
cz(ja+jb+1:)=0.
|
|
|
|
!Transform to time domain (real), fsample=12000 Hz
|
|
call four2a(cz,2*nfft2,1,1,-1)
|
|
do i=0,nfft2-1
|
|
j=nfft2-1-i
|
|
iwave(2*i+2)=nint(real(cz(j))) !Note the reversed order!
|
|
iwave(2*i+1)=nint(aimag(cz(j)))
|
|
enddo
|
|
iwave(2*nfft2+1:)=0
|
|
|
|
nsubmode=mode_q65-1
|
|
nfa=990 !Tight limits around ipk for the wideband decode
|
|
nfb=1010
|
|
if(nagain.eq.1) then !For nagain=1, use limits of +/- ntol
|
|
nfa=max(100,1000-ntol)
|
|
nfb=min(2500,1000+ntol)
|
|
endif
|
|
nsnr0=-99 !Default snr for no decode
|
|
|
|
if(iseq.eq.1) iwave(1:360000)=iwave(360001:720000)
|
|
|
|
csubmode(1:2)='60'
|
|
csubmode(3:3)=char(ichar('A')+nsubmode)
|
|
nhhmmss=100*nutc
|
|
nutc1=nutc
|
|
datetime(12:13)='00'
|
|
datetime1=datetime
|
|
if(ntrperiod.eq.30) then
|
|
csubmode(1:2)='30'
|
|
nhhmmss=100*nutc + iseq*30
|
|
nutc1=nhhmmss
|
|
if(iseq.eq.1) datetime1(12:13)='30'
|
|
endif
|
|
|
|
! NB: Frequency of ipk is now shifted to 1000 Hz.
|
|
call map65_mmdec(nutc1,iwave,nqd,ntrperiod,nsubmode,nfa,nfb,1000,ntol, &
|
|
newdat,nagain,max_drift,ndepth,mycall,hiscall,hisgrid)
|
|
MHz=fcenter
|
|
freq0=MHz + 0.001d0*ikhz
|
|
|
|
if(nsnr0.gt.-99) then
|
|
|
|
if(.not.bClickDecode) then
|
|
do i=1,ndecodes !Check for dupes
|
|
i1=index(result(i)(42:),trim(msg0))
|
|
if(i1.gt.0) go to 800 !This is a dupe, don't save it again
|
|
enddo
|
|
endif
|
|
|
|
nq65df=nint(1000*(0.001*k0*df+nkhz_center-48.0+1.000-1.27046-ikhz))-nfcal
|
|
nq65df=nq65df + nfreq0 - 1000
|
|
ikhz1=ikhz
|
|
ndf=nq65df
|
|
if(ndf.gt.500) ikhz1=ikhz + (nq65df+500)/1000
|
|
if(ndf.lt.-500) ikhz1=ikhz + (nq65df-500)/1000
|
|
ndf=nq65df - 1000*(ikhz1-ikhz)
|
|
freq1=freq0 + 0.001d0*(ikhz1-ikhz)
|
|
frx=0.001*k0*df+nkhz_center-48.0+1.0 - 0.001*nfcal
|
|
fsked=frx - 0.001*ndop00/2.0 - 0.001*offset
|
|
if(iand(nCFOM,2).eq.2) write(*,3001) nCFOM,ndop00,frx,fsked
|
|
3001 format('A',i5,i8,f10.3,f10.1)
|
|
ctmp=csubmode//' '//trim(msg0)
|
|
ndecodes=min(ndecodes+1,50)
|
|
write(result(ndecodes),1120) nhhmmss,frx,fsked,xdt0,nsnr0,trim(ctmp)
|
|
1120 format(i6.6,f9.3,f7.1,f7.2,i5,2x,a)
|
|
write(12,1130) datetime1,trim(result(ndecodes)(7:))
|
|
1130 format(a13,1x,a)
|
|
result(ndecodes)=trim(result(ndecodes))//char(0)
|
|
800 idec=0
|
|
endif
|
|
|
|
900 flush(12)
|
|
return
|
|
end subroutine q65b
|