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1. wspr_fsk8_sim.f90: Add Watterson channel model. Fading is applied only to .c4 files. 2. wspr_fsk8d.f90: Add the capability to read and process .c4 files.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7697 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Steven Franke
parent
a5054c7d5d
commit
c001d11c57
@ -8,14 +8,17 @@ program wspr_fsk8_sim
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type(hdr) h !Header for .wav file
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character arg*12,fname*16
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character msg*22,msgsent*22
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complex c0(0:NZ-1)
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complex c(0:NZ-1)
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real*8 fMHz
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integer itone(NN)
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integer*2 iwave(NMAX) !Generated full-length waveform
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! Get command-line argument(s)
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nargs=iargc()
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if(nargs.ne.5) then
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print*,'Usage: wspr_fsk8_sim "message" f0 DT nfiles snr'
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print*,'Example: wspr_fsk8_sim "K1ABC FN42 30" 1640 0.0 10 -33'
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if(nargs.ne.8) then
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print*,'Usage: wspr5sim "message" f0 DT fsp del nwav nfiles snr'
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print*,'Example: wspr5sim "K1ABC FN42 30" 50 0.0 0.1 1.0 1 10 -33'
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go to 999
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endif
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call getarg(1,msg) !Message to be transmitted
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@ -24,8 +27,14 @@ program wspr_fsk8_sim
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call getarg(3,arg)
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read(arg,*) xdt !Time offset from nominal (s)
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call getarg(4,arg)
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read(arg,*) nfiles !Number of files
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read(arg,*) fspread !Watterson frequency spread (Hz)
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call getarg(5,arg)
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read(arg,*) delay !Watterson delay (ms)
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call getarg(6,arg)
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read(arg,*) nwav !1 for *.wav file, 0 for *.c4 file
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call getarg(7,arg)
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read(arg,*) nfiles !Number of files
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call getarg(8,arg)
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read(arg,*) snrdb !SNR_2500
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twopi=8.0*atan(1.0)
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@ -45,15 +54,53 @@ program wspr_fsk8_sim
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1000 format('f0:',f9.3,' DT:',f6.2,' TxT:',f6.1,' SNR:',f6.1, &
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' BW:',f4.1,2x,a22)
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phi=0.0
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c0=0.
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k=-1 + nint(xdt/dt)
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do j=1,NN !Generate OQPSK waveform from itone
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dphi=twopi*(f0+itone(j)*baud)*dt
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if(k.eq.0) phi=-dphi
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do i=1,NSPS
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k=k+1
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phi=phi+dphi
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if(phi.gt.twopi) phi=phi-twopi
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xphi=phi
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if(k.ge.0 .and. k.lt.NZ) c0(k)=cmplx(cos(xphi),sin(xphi))
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enddo
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enddo
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if( fspread .ne. 0.0 .or. delay .ne. 0.0 ) then
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call watterson(c0,NZ,fs,delay,fspread)
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endif
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c0=sig*c0 !Scale to requested sig level
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do ifile=1,nfiles
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call wspr_fsk8_wav(baud,xdt,f0,itone,snrdb,iwave)
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h=default_header(12000,NMAX)
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write(fname,1102) ifile
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1102 format('000000_',i4.4,'.wav')
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open(10,file=fname,status='unknown',access='stream')
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write(10) h,iwave !Save to *.wav file
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close(10)
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write(*,1110) ifile,xdt,f0,snrdb,fname
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if(nwav.eq.0) then
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if( snrdb.lt.90) then
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do i=0,NZ-1
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xnoise=gran()
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ynoise=gran()
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c(i)=c0(i)+cmplx(xnoise,ynoise)
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enddo
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endif
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write(fname,1100) ifile
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1100 format('000000_',i4.4,'.c4')
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open(10,file=fname,status='unknown',access='stream')
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fMHz=1.866d0
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nmin=4
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write(10) fname,nmin,fMHz,c
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else
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call wspr_fsk8_wav(baud,xdt,f0,itone,snrdb,iwave)
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h=default_header(12000,NMAX)
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write(fname,1102) ifile
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1102 format('000000_',i4.4,'.wav')
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open(10,file=fname,status='unknown',access='stream')
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write(10) h,iwave !Save to *.wav file
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close(10)
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endif
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write(*,1110) ifile,xdt,f0,snrdb,fname
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1110 format(i4,f7.2,f8.2,f7.1,2x,a16)
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enddo
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@ -15,7 +15,7 @@ program wspr_fsk8d
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! Still to do: find and decode more than one signal in the specified passband.
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include 'wspr_fsk8_params.f90'
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character arg*8,message*22,cbits*50,infile*80,datetime*11
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character arg*8,message*22,cbits*50,infile*80,fname*16,datetime*11
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character*120 data_dir
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complex csync(0:N7-1) !Sync symbols for Costas 7x7 array
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complex c1(0:2*N7-1)
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@ -81,14 +81,23 @@ program wspr_fsk8d
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do ifile=7,nargs
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call getarg(ifile,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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j1=index(infile,'.c4')
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j2=index(infile,'.wav')
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read(infile(j2-4:j2-1),*) nutc
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datetime=infile(j2-11:j2-1)
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if(degrade.gt.0.0) call degrade_snr(iwave,NMAX,degrade,rxbw)
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call wspr_fsk8_downsample(iwave,c)
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if(j1.gt.0) then
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read(10,end=999) fname,ntrmin,fMHz,c(0:NZ-1)
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read(fname(8:11),*) nutc
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write(datetime,'(i11)') nutc
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else if(j2.gt.0) then
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read(10,end=999) ihdr,iwave
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read(infile(j2-4:j2-1),*) nutc
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datetime=infile(j2-11:j2-1)
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if(degrade.gt.0.0) call degrade_snr(iwave,NMAX,degrade,rxbw)
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call wspr_fsk8_downsample(iwave,c)
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else
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print*,'Wrong file format?'
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go to 999
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endif
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close(10)
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pmax=0.
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df1=fs/(2*N7)
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ia=nint(100.0/df1)
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