64 lines
1.8 KiB
Plaintext
64 lines
1.8 KiB
Plaintext
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program ft8d
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! Decode FT8 data read from *.wav files.
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include 'ft8_params.f90'
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character*12 arg
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character infile*80,datetime*13,message*22
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real s(NH1,NHSYM)
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real candidate(3,100)
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integer ihdr(11)
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integer*2 iwave(NMAX) !Generated full-length waveform
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real dd(NMAX)
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nargs=iargc()
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if(nargs.lt.3) then
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print*,'Usage: ft8d MaxIt Norder file1 [file2 ...]'
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print*,'Example ft8d 40 2 *.wav'
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go to 999
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endif
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call getarg(1,arg)
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read(arg,*) max_iterations
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call getarg(2,arg)
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read(arg,*) norder
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nfiles=nargs-2
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twopi=8.0*atan(1.0)
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fs=12000.0 !Sample rate
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dt=1.0/fs !Sample interval (s)
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tt=NSPS*dt !Duration of "itone" symbols (s)
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ts=2*NSPS*dt !Duration of OQPSK symbols (s)
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baud=1.0/tt !Keying rate (baud)
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txt=NZ*dt !Transmission length (s)
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nfa=100.0
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nfb=3000.0
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nfqso=1500.0
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do ifile=1,nfiles
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call getarg(ifile+2,infile)
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open(10,file=infile,status='old',access='stream')
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read(10,end=999) ihdr,iwave
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close(10)
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j2=index(infile,'.wav')
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read(infile(j2-6:j2-1),*) nutc
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datetime=infile(j2-13:j2-1)
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call sync8(iwave,nfa,nfb,nfqso,s,candidate,ncand)
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syncmin=2.0
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dd=iwave
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do icand=1,ncand
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sync=candidate(3,icand)
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if( sync.lt.syncmin) cycle
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f1=candidate(1,icand)
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xdt=candidate(2,icand)
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nsnr=min(99,nint(10.0*log10(sync)-25.5))
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call ft8b(dd,nfqso,f1,xdt,nharderrors,dmin,nbadcrc,message,xsnr)
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nsnr=xsnr
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xdt=xdt-0.6
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write(*,1110) datetime,0,nsnr,xdt,f1,message,nharderrors,dmin
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1110 format(a13,2i4,f6.2,f7.1,' ~ ',a22,i6,f7.1)
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enddo
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enddo ! ifile loop
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999 end program ft8d
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