2021-04-09 08:57:41 -04:00
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program mapsim
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! Generate simulated data for testing of MAP65
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parameter (NMAX=96000*60)
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real*4 d4(4,NMAX) !Floating-point data
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integer*2 id4(4,NMAX) !i*2 data, dual polarization
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integer*2 id2(2,NMAX) !i*2 data, single polarization
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complex cwave(NMAX) !Generated complex waveform (no noise)
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complex z,zx,zy
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real*8 fcenter,fsample,samfac,f,dt,twopi,phi,dphi
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character msg0*22,message*22,msgsent*22,arg*8,fname*13,mode*2
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nargs=iargc()
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if(nargs.ne.9) then
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print*,'Usage: mapsim DT "message" mode f1 f2 nsigs pol SNR nfiles'
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print*,'Example: 2.5 "CQ K1ABC FN42" B -22 33 20 45 -20 1'
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print*,' '
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print*,'Enter message = "" to use entries in msgs.txt.'
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print*,'Enter pol = -1 to generate a range of polarization angles.'
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print*,'Enter SNR = 0 to generate a range of SNRs.'
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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,*) dt0 !Time delay
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call getarg(2,msg0)
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message=msg0 !Transmitted message
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call getarg(3,mode) !JT65 sub-mode (A B C B2 C2)
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call getarg(4,arg)
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read(arg,*) f1 !Lowest freq (kHz, relative to fcenter)
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call getarg(5,arg)
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read(arg,*) f2 !Highest freq
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call getarg(6,arg)
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read(arg,*) nsigs !Number of signals in each file
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call getarg(7,arg)
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read(arg,*) npol !Polarization in degrees
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call getarg(8,arg)
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read(arg,*) snrdb !S/N
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pol=npol
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call getarg(9,arg)
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read(arg,*) nfiles !Number of files
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rmsdb=25.
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rms=10.0**(0.05*rmsdb)
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fcenter=144.125d0 !Center frequency (MHz)
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fsample=96000.d0 !Sample rate (Hz)
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dt=1.d0/fsample !Sample interval (s)
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twopi=8.d0*atan(1.d0)
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rad=360.0/twopi
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samfac=1.d0
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mode65=1
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if(mode(1:1).eq.'B') mode65=2
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if(mode(1:1).eq.'C') mode65=4
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nfast=1
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if(mode(2:2).eq.'2') nfast=2
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npts=NMAX/nfast
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open(12,file='msgs.txt',status='old')
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write(*,1000)
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1000 format('File N freq S/N pol Message'/ &
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'---------------------------------------------------')
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do ifile=1,nfiles
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nmin=ifile-1
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if(mode(2:2).eq.' ') nmin=2*nmin
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write(fname,1002) nmin !Create the output filenames
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1002 format('000000_',i4.4,'00')
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open(10,file=fname//'.iq',access='stream',status='unknown')
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open(11,file=fname//'.tf2',access='stream',status='unknown')
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call noisegen(d4,npts) !Generate Gaussuian noise
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if(msg0.ne.' ') then
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call cgen65(message,mode65,nfast,samfac,nsendingsh,msgsent,cwave,nwave)
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endif
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rewind 12
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do isig=1,nsigs
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if(msg0.eq.' ') then
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read(12,1004) message
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1004 format(a22)
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call cgen65(message,mode65,nfast,samfac,nsendingsh,msgsent, &
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cwave,nwave)
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endif
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if(npol.lt.0) pol=(isig-1)*180.0/nsigs
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a=cos(pol/rad)
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b=sin(pol/rad)
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f=1000.0*(f1+f2)/2.0
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if(nsigs.gt.1) f=1000.0*(f1 + (isig-1)*(f2-f1)/(nsigs-1.0))
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dphi=twopi*f*dt + 0.5*twopi
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snrdbx=snrdb
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if(snrdb.ge.-1.0) snrdbx=-15.0 - 15.0*(isig-1.0)/nsigs
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sig=sqrt(2.2*2500.0/96000.0) * 10.0**(0.05*snrdbx)
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write(*,1020) ifile,isig,0.001*f,snrdbx,nint(pol),msgsent
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1020 format(i3,i4,f8.3,f7.1,i5,2x,a22)
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phi=0.
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! i0=fsample*(3.5d0+0.05d0*(isig-1))
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i0=fsample*(1.d0 + dt0)
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do i=1,nwave
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phi=phi + dphi
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if(phi.lt.-twopi) phi=phi+twopi
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if(phi.gt.twopi) phi=phi-twopi
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xphi=phi
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z=sig*cwave(i)*cmplx(cos(xphi),-sin(xphi))
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zx=a*z
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zy=b*z
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j=i+i0
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d4(1,j)=d4(1,j) + real(zx)
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d4(2,j)=d4(2,j) + aimag(zx)
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d4(3,j)=d4(3,j) + real(zy)
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d4(4,j)=d4(4,j) + aimag(zy)
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enddo
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enddo
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do i=1,npts
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id4(1,i)=nint(rms*d4(1,i))
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id4(2,i)=nint(rms*d4(2,i))
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id4(3,i)=nint(rms*d4(3,i))
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id4(4,i)=nint(rms*d4(4,i))
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id2(1,i)=id4(1,i)
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id2(2,i)=id4(2,i)
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enddo
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write(10) fcenter,id2(1:2,1:npts)
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write(11) fcenter,id4(1:4,1:npts)
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close(10)
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close(11)
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enddo
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999 end program mapsim
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