program fer65
! End-to-end simulator for testing JT65.
! Options
! jt65sim jt65
!----------------------------------------------------------------
! -a aggressive
! -d Doppler spread -d depth
! -f Number of files -f freq
! -m (sub)mode -m (sub)mode
! -n number of generated sigs -n ntrials
! -t Time offset (s) -r robust sync
! -p Do not seed random #s -c mycall
! -x hiscall
! -g hisgrid
! -X hinted-decode flags
! -s S/N in 2500 Hz -s single-decode mode
implicit real*8 (a-h,o-z)
real*8 s(7),sq(7)
character arg*12,cmnd*100,decoded*22,submode*1,csync*1,f1*15,f2*15
character*12 outfile
logical syncok
nargs=iargc()
if(nargs.ne.7) then
print*,'Usage: fer65 submode fspread snr1 snr2 Navg DS iters'
print*,'Example: fer65 C 3.0 -28 -12 8 1 1000'
go to 999
endif
call getarg(1,submode)
call getarg(2,arg)
read(arg,*) d
call getarg(3,arg)
read(arg,*) snr1
call getarg(4,arg)
read(arg,*) snr2
call getarg(5,arg)
read(arg,*) navg
call getarg(6,arg)
read(arg,*) nds
call getarg(7,arg)
read(arg,*) iters
write(outfile,1001) submode,d,navg,nds
1001 format(a1,f6.2,'_',i2.2,'_',i1)
if(outfile(2:2).eq.' ') outfile(2:2)='0'
if(outfile(3:3).eq.' ') outfile(3:3)='0'
ndepth=3
if(navg.gt.1) ndepth=ndepth+16
if(nds.ne.0) ndepth=ndepth+32
dfmax=3
if(submode.eq.'b' .or. submode.eq.'B') dfmax=6
if(submode.eq.'c' .or. submode.eq.'C') dfmax=11
ntrials=1000
naggressive=10
open(20,file=outfile,status='unknown')
open(21,file='fer65.21',status='unknown')
write(20,1000) submode,iters,ntrials,naggressive,d,ndepth,navg,nds
1000 format(/'JT65',a1,' Iters:',i5,' T:',i6,' Aggr:',i3, &
' Dop:',f6.2,' Depth:',i2,' Navg:',i3,' DS:',i2)
write(20,1002)
1002 format(/' dB nsync ngood nbad sync dsnr ', &
'DT Freq Nsum Width'/85('-'))
flush(20)
do isnr=0,20
snr=snr1+isnr
if(snr.gt.snr2) exit
nsync=0
ngood=0
nbad=0
s=0.
sq=0.
do iter=1,iters
write(cmnd,1010) submode,d,snr,navg
1010 format('./jt65sim -n 1 -m ',a1,' -d',f7.2,' -s \\',f5.1,' -f',i3,' >devnull')
call unlink('000000_????.wav')
call system(cmnd)
if(navg.gt.1) then
do i=navg,2,-1
j=2*i-1
write(f1,1011) i
write(f2,1011) j
1011 format('000000_',i4.4,'.wav')
call rename(f1,f2)
enddo
endif
call unlink('decoded.txt')
call unlink('fort.13')
isync=0
nsnr=0
dt=0.
nfreq=0
ndrift=0
nwidth=0
cmnd='./jt65 -m A -a 10 -c K1ABC -f 1500 -n 1000 -d 5 -s 000000_????.wav > decoded.txt'
cmnd(11:11)=submode
write(cmnd(47:48),'(i2)') ndepth
call system(cmnd)
open(13,file='fort.13',status='old',err=20)
do i=1,navg
read(13,1012) nutc,isync,nsnr,dt,nfreq,ndrift,nwidth,decoded, &
nft,nsum,nsmo
1012 format(i4,i4,i5,f6.2,i5,i4,i3,1x,a22,5x,3i3)
if(nft.gt.0) exit
enddo
close(13)
syncok=abs(dt).lt.0.2 .and. float(abs(nfreq-1500)).lt.dfmax
csync=' '
if(syncok) csync='*'
write(21,1014) nutc,isync,nsnr,dt,nfreq,ndrift,nwidth, &
nft,nsum,nsmo,csync,decoded(1:16),nft,nsum,nsmo
1014 format(i4,i4,i5,f6.2,i5,i4,3x,4i3,1x,a1,1x,a16,i2,2i3)
flush(21)
if(syncok) then
nsync=nsync+1
s(1)=s(1) + isync
sq(1)=sq(1) + isync*isync
s(6)=s(6) + nwidth
sq(6)=sq(6) + nwidth*nwidth
if(decoded.eq.'K1ABC W9XYZ EN37 ') then
ngood=ngood+1
s(2)=s(2) + nsnr
s(3)=s(3) + dt
s(4)=s(4) + nfreq
s(5)=s(5) + ndrift
s(7)=s(7) + nsum
sq(2)=sq(2) + nsnr*nsnr
sq(3)=sq(3) + dt*dt
sq(4)=sq(4) + nfreq*nfreq
sq(5)=sq(5) + ndrift*ndrift
sq(7)=sq(7) + nsum*nsum
else if(decoded.ne.' ') then
nbad=nbad+1
print*,'Nbad:',nbad,decoded
endif
endif
20 continue
fsync=float(nsync)/iter
fgood=float(ngood)/iter
fbad=float(nbad)/iter
write(*,1020) nint(snr),iter,isync,nsnr,dt,nfreq,ndrift,nwidth,fsync, &
fgood,fbad,decoded(1:16),nft,nsum,nsmo
1020 format(i3,i5,i3,i4,f6.2,i5,i3,i3,2f6.3,f7.4,1x,a16,i2,2i3)
enddo
if(nsync.ge.1) then
xsync=s(1)/nsync
xwidth=s(6)/nsync
endif
esync=0.
if(nsync.ge.2) then
esync=sqrt(sq(1)/nsync - xsync**2)
ewidth=sqrt(sq(6)/nsync - xwidth**2)
endif
if(ngood.ge.1) then
xsnr=s(2)/ngood
xdt=s(3)/ngood
xfreq=s(4)/ngood
xdrift=s(5)/ngood
xsum=s(7)/ngood
endif
if(ngood.ge.2) then
esnr=sqrt(sq(2)/ngood - xsnr**2)
edt=sqrt(sq(3)/ngood - xdt**2)
efreq=sqrt(sq(4)/ngood - xfreq**2)
edrift=sqrt(sq(5)/ngood - xdrift**2)
esum=sqrt(sq(7)/ngood - xsum**2)
endif
dsnr=xsnr-snr
dfreq=xfreq-1500.0
if(ngood.eq.0) then
dsnr=0.
dfreq=0.
endif
write(20,1100) snr,nsync,ngood,nbad,xsync,esync,dsnr,esnr, &
xdt,edt,dfreq,efreq,xsum,esum,xwidth,ewidth
1100 format(f5.1,2i6,i4,2f6.1,f6.1,f5.1,f6.2,f5.2,6f5.1)
flush(20)
if(ngood.ge.int(0.99*iters)) exit
enddo
999 end program fer65