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https://github.com/saitohirga/WSJT-X.git
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de3e975b98
2. ft8d is now a bare-bones multi-decoder. 3. wsjt-x now includes the bare-bones multi-decoder for FT8. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7729 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
55 lines
1.6 KiB
Fortran
55 lines
1.6 KiB
Fortran
program ft8d
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! Decode FT8 data read from *.wav files.
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! FT8 is a potential mode intended for use at 6m (and maybe HF). It uses an
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! LDPC (174,87) code, 8-FSK modulation, and 15 second T/R sequences. Otherwise
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! should behave like JT65 and JT9 as used on HF bands, except that QSOs are
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! 4 x faster.
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! Reception and Demodulation algorithm:
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! ... tbd ...
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include 'ft8_params.f90'
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character*12 arg
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character infile*80,datetime*13
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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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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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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,s,candidate,ncand)
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call ft8b(datetime,s,candidate,ncand)
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enddo ! ifile loop
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999 end program ft8d
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