mirror of https://github.com/saitohirga/WSJT-X.git
Add a filtering for signals generated in ft8sim. Beware, not all options work.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8324 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Joe Taylor
parent
9de5ac51b4
commit
4f90f320c0
|
|
@ -426,6 +426,7 @@ set (wsjt_FSRCS
|
|||
lib/fil4.f90
|
||||
lib/fil6521.f90
|
||||
lib/filbig.f90
|
||||
lib/ft8/filt8.f90
|
||||
lib/fitcal.f90
|
||||
lib/fix_contest_msg.f90
|
||||
lib/flat1.f90
|
||||
|
|
|
|||
|
|
@ -0,0 +1,52 @@
|
|||
subroutine filt8(f0,nslots,width,wave)
|
||||
|
||||
parameter (NFFT=180000,NH=NFFT/2)
|
||||
real wave(NFFT)
|
||||
real x(NFFT)
|
||||
real s1(0:NH)
|
||||
real s2(0:NH)
|
||||
complex cx(0:NH)
|
||||
equivalence (x,cx)
|
||||
|
||||
x=wave
|
||||
call four2a(x,NFFT,1,-1,0) !r2c
|
||||
df=12000.0/NFFT
|
||||
fa=f0 - 0.5*6.25
|
||||
fb=f0 + 7.5*6.25 + (nslots-1)*60.0
|
||||
ia2=nint(fa/df)
|
||||
ib1=nint(fb/df)
|
||||
ia1=nint(ia2-width/df)
|
||||
ib2=nint(ib1+width/df)
|
||||
pi=4.0*atan(1.0)
|
||||
do i=ia1,ia2
|
||||
fil=(1.0 + cos(pi*df*(i-ia2)/width))/2.0
|
||||
cx(i)=fil*cx(i)
|
||||
enddo
|
||||
do i=ib1,ib2
|
||||
fil=(1.0 + cos(pi*df*(i-ib1)/width))/2.0
|
||||
cx(i)=fil*cx(i)
|
||||
enddo
|
||||
cx(0:ia1-1)=0.
|
||||
cx(ib2+1:)=0.
|
||||
|
||||
call four2a(cx,nfft,1,1,-1) !c2r
|
||||
wave=x/nfft
|
||||
|
||||
!###
|
||||
if(nslots.ne.99) return
|
||||
x=wave
|
||||
call four2a(x,NFFT,1,-1,0) !r2c
|
||||
do i=0,NH
|
||||
s1(i)=real(cx(i))**2 + aimag(cx(i))**2
|
||||
enddo
|
||||
nadd=20
|
||||
call smo(s1,NH+1,s2,nadd)
|
||||
do i=0,NH
|
||||
freq=i*df
|
||||
write(29,3101) freq,db(s2(i)) - 72.0
|
||||
3101 format(2f12.3)
|
||||
enddo
|
||||
!###
|
||||
|
||||
return
|
||||
end subroutine filt8
|
||||
|
|
@ -5,13 +5,15 @@ program ft8sim
|
|||
|
||||
use wavhdr
|
||||
include 'ft8_params.f90' !Set various constants
|
||||
parameter (NWAVE=NN*NSPS)
|
||||
type(hdr) h !Header for .wav file
|
||||
character arg*12,fname*17,sorm*1
|
||||
character arg*12,fname*17
|
||||
character msg32*32,msg*22,msgsent*22,msg0*22
|
||||
character*6 mygrid6
|
||||
logical bcontest
|
||||
complex c0(0:NMAX-1)
|
||||
complex c(0:NMAX-1)
|
||||
real wave(NMAX)
|
||||
integer itone(NN)
|
||||
integer*1 msgbits(KK)
|
||||
integer*2 iwave(NMAX) !Generated full-length waveform
|
||||
|
|
@ -20,40 +22,30 @@ program ft8sim
|
|||
! Get command-line argument(s)
|
||||
nargs=iargc()
|
||||
if(nargs.ne.8) then
|
||||
print*,'Usage: ft8sim "message" s|m|d f0 DT fdop del nfiles snr'
|
||||
print*,'Example: ft8sim "K1ABC W9XYZ EN37" m 1500.0 0.0 0.1 1.0 10 -18'
|
||||
print*,'s|m|d: s for single signal, m for 25 signals, d for 10.'
|
||||
print*,'f0 is ignored when sorm = m'
|
||||
print*,'Usage: ft8sim "message" nsig|f0 DT fdop del width nfiles snr'
|
||||
print*,'Examples: ft8sim "K1ABC W9XYZ EN37" 1500.0 0.0 0.1 1.0 0 10 -18'
|
||||
print*,' ft8sim "K1ABC W9XYZ EN37" 10 0.0 0.1 1.0 25 10 -18'
|
||||
print*,' ft8sim "K1ABC W9XYZ EN37" 25 0.0 0.1 1.0 25 10 -18'
|
||||
print*,'Make nfiles negative to invoke 72-bit contest mode.'
|
||||
go to 999
|
||||
endif
|
||||
call getarg(1,msg32) !Message to be transmitted
|
||||
call getarg(2,sorm) !s for single signal, m for multiple sigs
|
||||
if(sorm.eq."s") then
|
||||
print*,"Generating single signal at 1500 Hz."
|
||||
nsig=1
|
||||
elseif( sorm.eq."m") then
|
||||
print*,"Generating 25 signals per file."
|
||||
nsig=25
|
||||
elseif( sorm.eq."d") then
|
||||
print*,"Generating 10 signals per file."
|
||||
nsig=50
|
||||
else
|
||||
print*,"sorm parameter must be s, m, or d."
|
||||
goto 999
|
||||
endif
|
||||
call getarg(3,arg)
|
||||
call getarg(2,arg)
|
||||
read(arg,*) f0 !Frequency (only used for single-signal)
|
||||
call getarg(4,arg)
|
||||
call getarg(3,arg)
|
||||
read(arg,*) xdt !Time offset from nominal (s)
|
||||
call getarg(5,arg)
|
||||
call getarg(4,arg)
|
||||
read(arg,*) fspread !Watterson frequency spread (Hz)
|
||||
call getarg(6,arg)
|
||||
call getarg(5,arg)
|
||||
read(arg,*) delay !Watterson delay (ms)
|
||||
call getarg(6,arg)
|
||||
read(arg,*) width !Filter transition width (Hz)
|
||||
call getarg(7,arg)
|
||||
read(arg,*) nfiles !Number of files
|
||||
call getarg(8,arg)
|
||||
read(arg,*) snrdb !SNR_2500
|
||||
nsig=1
|
||||
if(f0.lt.100.0) nsig=f0
|
||||
|
||||
bcontest=nfiles.lt.0
|
||||
nfiles=abs(nfiles)
|
||||
|
|
@ -115,6 +107,7 @@ program ft8sim
|
|||
endif
|
||||
k=-1 + nint((xdt+0.5+0.01*gran())/dt)
|
||||
! k=-1 + nint((xdt+0.5)/dt)
|
||||
ia=k+1
|
||||
phi=0.0
|
||||
do j=1,NN !Generate complex waveform
|
||||
dphi=twopi*(f0+itone(j)*baud)*dt
|
||||
|
|
@ -127,21 +120,27 @@ program ft8sim
|
|||
if(fspread.ne.0.0 .or. delay.ne.0.0) call watterson(c0,NMAX,fs,delay,fspread)
|
||||
c=c+sig*c0
|
||||
enddo
|
||||
|
||||
if(nsig.eq.5) call compress(c)
|
||||
ib=k
|
||||
wave=real(c)
|
||||
peak=maxval(abs(wave(ia:ib)))
|
||||
rms=sqrt(dot_product(wave(ia:ib),wave(ia:ib))/NWAVE)
|
||||
nslots=1
|
||||
if(width.gt.0.0) call filt8(f0,nslots,width,wave)
|
||||
|
||||
if(snrdb.lt.90) then
|
||||
do i=0,NMAX-1 !Add gaussian noise at specified SNR
|
||||
do i=1,NMAX !Add gaussian noise at specified SNR
|
||||
xnoise=gran()
|
||||
ynoise=gran()
|
||||
c(i)=c(i) + cmplx(xnoise,ynoise)
|
||||
! wave(i)=wave(i) + xnoise
|
||||
! if(i.ge.ia .and. i.le.ib) write(30,3001) i,wave(i)/peak
|
||||
!3001 format(i8,f12.6)
|
||||
wave(i)=wave(i) + xnoise
|
||||
enddo
|
||||
endif
|
||||
|
||||
fac=32767.0
|
||||
rms=100.0
|
||||
if(snrdb.ge.90.0) iwave(1:NMAX)=nint(fac*real(c))
|
||||
if(snrdb.lt.90.0) iwave(1:NMAX)=nint(rms*real(c))
|
||||
if(snrdb.ge.90.0) iwave(1:NMAX)=nint(fac*wave)
|
||||
if(snrdb.lt.90.0) iwave(1:NMAX)=nint(rms*wave)
|
||||
|
||||
h=default_header(12000,NMAX)
|
||||
write(fname,1102) ifile
|
||||
|
|
@ -155,4 +154,5 @@ program ft8sim
|
|||
|
||||
999 end program ft8sim
|
||||
|
||||
include 'filt8.f90'
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue