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Starting work toward flexible use of AP decoding in QRA64. Beware, this is still in progress!

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git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6928 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Joe Taylor 2016-07-19 13:16:10 +00:00
parent 07951f1a18
commit 920fd25537
6 changed files with 73 additions and 151 deletions
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3
lib/jt65_decode.f90
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@ -99,7 +99,8 @@ contains
if(nsubmode.ge.100) then
! This is QRA64 mode
call qra64a(dd,nf1,nf2,nfqso,ntol,mycall,sync,nsnr,dtx,nfreq,decoded,nft)
call qra64a(dd,nf1,nf2,nfqso,ntol,mycall,hiscall,hisgrid,sync,nsnr, &
dtx,nfreq,decoded,nft)
! if(sync.lt.12.8) go to 900 !### Temporary ###
if (associated(this%callback)) then
ndrift=0

28
lib/qra/qra64/qra64_subs.c
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@ -1,4 +1,4 @@
// qra64_subs.c
// qra64_subs.c
// Fortran interface routines for QRA64
#include "qra64.h"
@ -10,13 +10,12 @@ static qra64codec *pqra64codec = NULL;
void qra64_enc_(int x[], int y[])
{
if (pqra64codec==NULL)
pqra64codec = qra64_init(QRA_AUTOAP);
if (pqra64codec==NULL) pqra64codec = qra64_init(QRA_AUTOAP);
qra64_encode(pqra64codec, y, x);
}
void qra64_dec_(float r[], int* nmycall, int xdec[], int* rc)
void qra64_dec_(float r[], int* nmycall, int* nhiscall, int* nhisgrid,
int xdec[], float* snr, int* rc)
{
// Return codes:
// rc=-16 failed sanity check
@ -41,21 +40,20 @@ void qra64_dec_(float r[], int* nmycall, int xdec[], int* rc)
#endif
if(ncall!=ncall0) {
if (pqra64codec!=NULL)
qra64_close(pqra64codec);
pqra64codec = qra64_init(QRA_AUTOAP);
// the following apset call is not strictly necessary
// It enables AP decoding of messages directed to our call
// also in the case we have never made a CQ
qra64_apset(pqra64codec,ncall,0,0,APTYPE_MYCALL);
if (pqra64codec!=NULL) qra64_close(pqra64codec);
pqra64codec = qra64_init(QRA_AUTOAP);
// the following apset call is not strictly necessary
// It enables AP decoding of messages directed to our call
// also in the case we have never made a CQ
qra64_apset(pqra64codec,ncall,0,0,APTYPE_MYCALL);
ncall0=ncall;
}
*rc = qra64_decode(pqra64codec,&EbNodBEstimated,xdec,r);
*snr = EbNodBEstimated - 31.0;
#ifdef NICO_WANTS_SNR_DUMP
fout = fopen("C:\\JTSDK\\snrdump.txt","a+");
if ((*rc)>=0)
fprintf(fout,"rc=%d snr=%.2f dB\n",*rc,EbNodBEstimated-31.0f);
if ((*rc)>=0) fprintf(fout,"rc=%d snr=%.2f dB\n",*rc,EbNodBEstimated-31.0f);
fclose(fout);
#endif
#endif
}

127
lib/qra/qra64/qra64sim.f90
View File

@ -4,7 +4,6 @@ program qra64sim
use wavhdr
use packjt
use options
parameter (NMAX=54*12000) ! = 648,000
parameter (NFFT=10*65536,NH=NFFT/2)
type(hdr) h !Header for .wav file
@ -16,93 +15,29 @@ program qra64sim
complex cspread(0:NFFT-1) !Complex amplitude for Rayleigh fading
complex z
real*8 f0,dt,twopi,phi,dphi,baud,fsample,freq
character msg*22,fname*11,csubmode*1,c,optarg*500,numbuf*32
character msg*22,fname*11,csubmode*1,arg*12
character msgsent*22
logical :: display_help=.false.,seed_prngs=.true.
type (option) :: long_options(9) = [ &
option ('help',.false.,'h','Display this help message',''), &
option ('sub-mode',.true.,'M','message','MSG'), &
option ('sub-mode',.true.,'m','sub mode, default MODE=A','MODE'), &
option ('num-sigs',.true.,'n','number of signals per file, default SIGNALS=10','SIGNALS'), &
option ('doppler-spread',.true.,'d','Doppler spread, default SPREAD=0.0','SPREAD'), &
option ('time-offset',.true.,'t','Time delta, default SECONDS=0.0','SECONDS'), &
option ('num-files',.true.,'f','Number of files to generate, default FILES=1','FILES'), &
option ('no-prng-seed',.false.,'p','Do not seed PRNGs (use for reproducible tests)',''), &
option ('strength',.true.,'s','S/N in dB (2500Hz reference b/w), default SNR=0','SNR') ]
! Default parameters:
csubmode='A'
mode65=1
nsigs=10
fspread=0.
xdt=0.
snrdb=0.
nfiles=1
do
call getopt('hM:m:n:d:t:f:ps:',long_options,c,optarg,narglen,nstat,noffset,nremain,.true.)
if( nstat .ne. 0 ) then
exit
end if
select case (c)
case ('h')
display_help = .true.
case ('M')
read (optarg(:narglen), *) msg
print*,msg
case ('m')
read (optarg(:narglen), *) csubmode
if(csubmode.eq.'A') mode65=1
if(csubmode.eq.'B') mode65=2
if(csubmode.eq.'C') mode65=4
case ('n')
read (optarg(:narglen), *,err=10) nsigs
case ('d')
read (optarg(:narglen), *,err=10) fspread
case ('t')
read (optarg(:narglen), *) numbuf
if (numbuf(1:1) == '\') then
read (numbuf(2:), *,err=10) xdt
else
read (numbuf, *,err=10) xdt
end if
case ('f')
read (optarg(:narglen), *,err=10) nfiles
case ('p')
seed_prngs=.false.
case ('s')
read (optarg(:narglen), *) numbuf
if (numbuf(1:1) == '\') then
read (numbuf(2:), *,err=10) snrdb
else
read (numbuf, *,err=10) snrdb
end if
end select
cycle
10 display_help=.true.
print *, 'Optional argument format error for option -', c
end do
if(display_help .or. nstat.lt.0 .or. nremain.ge.1) then
print *, ''
print *, 'Usage: jt65sim [OPTIONS]'
print *, ''
print *, ' Generate one or more simulated JT65 signals in .WAV file(s)'
print *, ''
print *, 'Example: jt65sim -m B -n 10 -d 0.2 -s \\-24.5 -t 0.0 -f 4'
print *, ''
print *, 'OPTIONS: NB Use \ (\\ on *nix shells) to escape -ve arguments'
print *, ''
do i = 1, size (long_options)
call long_options(i) % print (6)
end do
nargs=iargc()
if(nargs.ne. 7) then
print *, 'Usage: qra64sim "msg" A-E Nsigs fDop DT Nfiles SNR'
print *, 'Example qra64sim "K1ABC W9XYZ EN37" A 10 0.2 0.0 1 0'
go to 999
endif
if (seed_prngs) then
call init_random_seed() !Seed Fortran RANDOM_NUMBER generator
call sgran() !Seed C rand generator (used in gran)
end if
call getarg(1,msg)
call getarg(2,csubmode)
mode64=2**(ichar(csubmode)-ichar('A'))
print*,csubmode,' ',mode64
call getarg(3,arg)
read(arg,*) nsigs
call getarg(4,arg)
read(arg,*) fspread
call getarg(5,arg)
read(arg,*) xdt
call getarg(6,arg)
read(arg,*) nfiles
call getarg(7,arg)
read(arg,*) snrdb
rms=100.
fsample=12000.d0 !Sample rate (Hz)
@ -116,11 +51,13 @@ program qra64sim
dfsig=2000.0/nsigs !Freq spacing between sigs in file (Hz)
ichk=0
write(*,1000)
1000 format('File Sig Freq A-E S/N DT Dop Message'/60('-'))
do ifile=1,nfiles !Loop over requested number of files
write(fname,1002) ifile !Output filename
1002 format('000000_',i4.4)
open(10,file=fname//'.wav',access='stream',status='unknown')
xnoise=0.
cdat=0.
if(snrdb.lt.90) then
@ -129,32 +66,30 @@ program qra64sim
enddo
endif
! msg="K1ABC W9XYZ EN37"
do isig=1,nsigs !Generate requested number of sigs
if(mod(nsigs,2).eq.0) f0=1500.0 + dfsig*(isig-0.5-nsigs/2)
if(mod(nsigs,2).eq.1) f0=1500.0 + dfsig*(isig-(nsigs+1)/2)
xsnr=snrdb
if(snrdb.eq.0.0) xsnr=-19 - isig
if(csubmode.eq.'B' .and. snrdb.eq.0.0) xsnr=-21 - isig
if(csubmode.eq.'C' .and. snrdb.eq.0.0) xsnr=-21 - isig
call genqra64(msg,ichk,msgsent,itone,itype)
bandwidth_ratio=2500.0/6000.0
sig=sqrt(2*bandwidth_ratio)*10.0**(0.05*xsnr)
! bandwidth_ratio=2500.0/6000.0
! sig=sqrt(2*bandwidth_ratio)*10.0**(0.05*xsnr)
sig=sqrt(2.0)*10.0**(0.05*xsnr)
if(xsnr.gt.90.0) sig=1.0
write(*,1020) ifile,isig,f0,csubmode,xsnr,xdt,fspread,msg
1020 format(i4,i4,f10.3,2x,a1,2x,f5.1,f6.2,f5.1,1x,a22)
phi=0.d0
dphi=0.d0
k=12000 + xdt*12000 !Start audio at t = xdt + 1.0 s
k=(xdt+1.0)*12000 !Start audio at t = xdt + 1.0 s
isym0=-99
do i=1,npts !Add this signal into cdat()
isym=i/nsps + 1
if(isym.gt.nsym) exit
if(isym.ne.isym0) then
freq=f0 + itone(isym)*baud*mode65
freq=f0 + itone(isym)*baud*mode64
dphi=twopi*freq*dt
isym0=isym
endif
@ -172,21 +107,13 @@ program qra64sim
twopi=8*atan(1.0)
cspread(0)=1.0
cspread(NH)=0.
! The following options were added 3/15/2016 to make the half-power tone
! widths equal to the requested Doppler spread. (Previously we effectively
! used b=1.0 and Gaussian shape, which made the tones 1.665 times wider.)
! b=2.0*sqrt(log(2.0)) !Gaussian (before 3/15/2016)
! b=2.0 !Lorenzian 3/15 - 3/27
b=6.0 !Lorenzian 3/28 onward
do i=1,NH
f=i*df
x=b*f/fspread
z=0.
a=0.
if(x.lt.3.0) then !Cutoff beyond x=3
! a=sqrt(exp(-x*x)) !Gaussian
a=sqrt(1.111/(1.0+x*x)-0.1) !Lorentzian
call random_number(r1)
phi1=twopi*r1

60
lib/qra64a.f90
View File

@ -1,9 +1,12 @@
subroutine qra64a(dd,nf1,nf2,nfqso,ntol,mycall_12,sync,nsnr,dtx,nfreq, &
decoded,nft)
subroutine qra64a(dd,nf1,nf2,nfqso,ntol,mycall_12,hiscall_12,hisgrid_6, &
sync,nsnr,dtx,nfreq,decoded,nft)
use packjt
parameter (NFFT=2*6912,NH=NFFT/2,NZ=5760)
character decoded*22,mycall_12*12,mycall*6
character decoded*22
character*12 mycall_12,hiscall_12
character*6 mycall,hiscall,hisgrid_6
character*4 hisgrid
logical ltext
integer icos7(0:6)
integer ipk(1)
@ -13,7 +16,6 @@ subroutine qra64a(dd,nf1,nf2,nfqso,ntol,mycall_12,sync,nsnr,dtx,nfreq, &
real s(NZ)
real savg(NZ)
real blue(0:25)
real red0(NZ)
real red(NZ)
real x(NFFT)
complex cx(0:NH)
@ -53,11 +55,10 @@ subroutine qra64a(dd,nf1,nf2,nfqso,ntol,mycall_12,sync,nsnr,dtx,nfreq, &
savg=savg/base - 1.0
ss=ss/base
red0=0.
red=-99.
fac=1.0/sqrt(21.0)
sync=0.
do if0=ia,ib
red0(if0)=0.
do j=0,25
t=-3.0
do n=0,6
@ -65,10 +66,10 @@ subroutine qra64a(dd,nf1,nf2,nfqso,ntol,mycall_12,sync,nsnr,dtx,nfreq, &
t=t + ss(i,1+2*n+j) + ss(i,1+2*n+j+78) + ss(i,1+2*n+j+154)
enddo
ccf(if0,j)=fac*t
if(ccf(if0,j).gt.red0(if0)) then
red0(if0)=ccf(if0,j)
if(red0(if0).gt.sync) then
sync=red0(if0)
if(ccf(if0,j).gt.red(if0)) then
red(if0)=ccf(if0,j)
if(red(if0).gt.sync) then
sync=red(if0)
f0=if0*df
dtx=j*istep/12000.0 - 1.0
i0=if0
@ -78,21 +79,7 @@ subroutine qra64a(dd,nf1,nf2,nfqso,ntol,mycall_12,sync,nsnr,dtx,nfreq, &
enddo
enddo
! red(ia:ib)=0.
! rewind 73
! do i=ia+3,ib-3
! r1=red0(i)
! red0(i)=0.
! r0=max(red0(i-3),red0(i-2),red0(i+2),red0(i+3))
! red0(i)=r1
! red(i)=max(0.0,r1-r0)
! write(73,3001) i*df,red(i),red0(i),r0
!3001 format(4f12.3)
! enddo
! flush(73)
red0=red0-4.0
write(17) ia,ib,red0(ia:ib)
write(17) ia,ib,red(ia:ib)
close(17)
if0=nint(f0/df)
@ -117,8 +104,7 @@ subroutine qra64a(dd,nf1,nf2,nfqso,ntol,mycall_12,sync,nsnr,dtx,nfreq, &
i=abs(ipk(1)-2*icos7(n))
if(i.le.1) nhard=nhard+1
enddo
! print*,'a',nhard,nhard,nhard
if(nhard.lt.6) go to 900
if(nhard.lt.5) go to 900
do i=0,63
k=i0 + 2*i
@ -130,17 +116,29 @@ subroutine qra64a(dd,nf1,nf2,nfqso,ntol,mycall_12,sync,nsnr,dtx,nfreq, &
enddo
enddo
if(sync.gt.1.0) nsnr=nint(10.0*log10(sync) - 38.0)
! if(sync.lt.12.8) go to 900 !### Temporary ###
if(sync.gt.1.0) snr1=10.0*log10(sync) - 38.0
nsnr=nint(snr1)
mycall=mycall_12(1:6) !### May need fixing ###
hiscall=hiscall_12(1:6)
hisgrid=hisgrid_6(1:4)
call packcall(mycall,nmycall,ltext)
call qra64_dec(s3,nmycall,dat4,irc) !Attempt decoding
call packcall(hiscall,nhiscall,ltext)
call packgrid(hisgrid,nhisgrid,ltext)
snr2=-99.
call qra64_dec(s3,nmycall,nhiscall,nhisgrid,dat4,snr2,irc) !Attempt decoding
if(irc.ge.0) then
call unpackmsg(dat4,decoded) !Unpack the user message
call fmtmsg(decoded,iz)
nft=100 + irc
nsnr=nint(snr2)
else
snr2=0.
endif
900 return
900 continue
write(78,3900) sync,snr1,snr2,snr2-snr1,dtx,nfreq,nhard,irc,decoded
3900 format(4f7.1,f7.2,i6,2i4,2x,a22)
return
end subroutine qra64a

2
lib/qra64code.f90
View File

@ -86,7 +86,7 @@ program QRA64code
mycall=' '
if(i1.ge.4) mycall=msg(1:i1-1)
call packcall(mycall,nmycall,ltext)
call qra64_dec(s3,nmycall,dec,irc) !Decode
call qra64_dec(s3,nmycall,dec,snr,irc) !Decode
decoded=" "
if(irc.ge.0) then

4
plotter.cpp
View File

@ -141,7 +141,6 @@ void CPlotter::draw(float swide[], bool bScroll, bool bRed)
j0=FreqfromX(i-1)/df_qra64;
j1=FreqfromX(i)/df_qra64;
smax=0.0;
y3[i]=0.0;
for(int jj=j0; jj<=j1; jj++) {
if(dec_data.sred[jj]>smax) smax=dec_data.sred[jj];
}
@ -150,7 +149,7 @@ void CPlotter::draw(float swide[], bool bScroll, bool bRed)
}
float fac=0.8/qMax(y3max,10.0f);
for(int i=1; i<iz; i++) {
if(y3[i]>0.0) {
if(y3[i]>0) {
y2=fac*y3[i];
LineBuf2[k].setX(i);
LineBuf2[k].setY(int(m_h2*(0.9-y2)));
@ -271,7 +270,6 @@ void CPlotter::drawRed(int ia, int ib, float swide[])
{
m_ia=ia;
m_ib=ib;
draw(swide,false,true);
}