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