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15 and 30 minute T/R periods for FST240 & FST240W

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This commit is contained in:
Bill Somerville 2020-07-17 23:44:14 +01:00
parent cccb38dbef
commit 4e0f1103b6
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GPG Key ID: D864B06D1E81618F
5 changed files with 34 additions and 22 deletions
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13
lib/fst240/fst240sim.f90
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@ -67,9 +67,10 @@ program fst240sim
nz=nsps*NN
txt=nz*dt !Transmission length (s)
tt=nsps*dt !Duration of symbols (s)
allocate( c0(0:nmax-1) )
allocate( c(0:nmax-1) )
allocate( wave(nmax) )
nwave=max(nmax,(NN+2)*nsps)
allocate( c0(0:nwave-1) )
allocate( c(0:nwave-1) )
allocate( wave(nwave) )
allocate( iwave(nmax) )
bandwidth_ratio=2500.0/(fs/2.0)
@ -108,7 +109,7 @@ program fst240sim
fsample=12000.0
icmplx=1
f0=f00+1.5*hmod*baud
call gen_fst240wave(itone,NN,nsps,nmax,fsample,hmod,f0,icmplx,c0,wave)
call gen_fst240wave(itone,NN,nsps,nwave,fsample,hmod,f0,icmplx,c0,wave)
k=nint((xdt+1.0)/dt)
if(nsec.eq.15) k=nint((xdt+0.5)/dt)
c0=cshift(c0,-k)
@ -117,7 +118,7 @@ program fst240sim
do ifile=1,nfiles
c=c0
if(fspread.ne.0.0 .or. delay.ne.0.0) call watterson(c,nmax,NZ,fs,delay,fspread)
if(fspread.ne.0.0 .or. delay.ne.0.0) call watterson(c,nwave,NZ,fs,delay,fspread)
c=sig*c
wave=real(c)
if(snrdb.lt.90) then
@ -135,7 +136,7 @@ program fst240sim
wave=fac*wave
endif
if(any(abs(wave).gt.32767.0)) print*,"Warning - data will be clipped."
iwave=nint(wave)
iwave=nint(wave(:size(iwave)))
h=default_header(12000,nmax)
if(nmax/12000.le.30) then
write(fname,1102) ifile

28
lib/fst240_decode.f90
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@ -68,7 +68,7 @@ contains
logical badsync,unpk77_success,single_decode
logical first,nohiscall,lwspr,ex
integer*2 iwave(300*12000)
integer*2 iwave(30*60*12000)
data mcq/0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0/
data mrrr/0,1,1,1,1,1,1,0,1,0,0,1,0,0,1,0,0,0,1/
@ -748,8 +748,8 @@ contains
integer hmod !Modulation index (submode)
integer im(1) !For maxloc
real candidates(100,4) !Candidate list
real s(18000) !Low resolution power spectrum
real s2(18000) !CCF of s() with 4 tones
real, allocatable :: s(:) !Low resolution power spectrum
real, allocatable :: s2(:) !CCF of s() with 4 tones
real xdb(-3:3) !Model 4-tone CCF peaks
real minsync
data xdb/0.25,0.50,0.75,1.0,0.75,0.50,0.25/
@ -776,6 +776,8 @@ contains
inb=nint(fh)
endif
nnw=nint(48000.*nsps*2./fs)
allocate (s(nnw))
s=0. !Compute low-resloution power spectrum
do i=ina,inb ! noise analysis window includes signal analysis window
j0=nint(i*df2/df1)
@ -785,7 +787,8 @@ contains
enddo
ina=max(ina,1+3*hmod) !Don't run off the ends
inb=min(inb,18000-3*hmod)
inb=min(inb,nnw-3*hmod)
allocate (s2(nnw))
s2=0.
do i=ina,inb !Compute CCF of s() and 4 tones
s2(i)=s(i-hmod*3) + s(i-hmod) +s(i+hmod) +s(i+hmod*3)
@ -796,7 +799,7 @@ contains
ncand=0
candidates=0
if(ia.lt.3) ia=3
if(ib.gt.18000-2) ib=18000-2
if(ib.gt.nnw-2) ib=nnw-2
! Find candidates, using the CLEAN algorithm to remove a model of each one
! from s2() after it has been found.
@ -824,6 +827,7 @@ contains
! On "plotspec" special request, compute Doppler spread for a decoded signal
include 'fst240/fst240_params.f90'
complex, allocatable :: cwave(:) !Reconstructed complex signal
complex, allocatable :: g(:) !Channel gain, g(t) in QEX paper
real,allocatable :: ss(:) !Computed power spectrum of g(t)
@ -835,15 +839,15 @@ contains
ncall=ncall+1
nfft=2*nmax
allocate(cwave(0:nmax-1))
nwave=max(nmax,(NN+2)*nsps)
allocate(cwave(0:nwave-1))
allocate(g(0:nfft-1))
wave=0
fsample=12000.0
nsym=160
call gen_fst240wave(itone,nsym,nsps,nmax,fsample,hmod,fc,1,cwave,wave)
call gen_fst240wave(itone,NN,nsps,nwave,fsample,hmod,fc,1,cwave,wave)
cwave=cshift(cwave,-i0*ndown)
fac=1.0/32768
g(0:nmax-1)=fac*float(iwave)*conjg(cwave)
g(0:nmax-1)=fac*float(iwave)*conjg(cwave(:nmax-1))
g(nmax:)=0.
call four2a(g,nfft,1,-1,1) !Forward c2c FFT
@ -861,7 +865,7 @@ contains
allocate(ss(-ia:ia)) !Allocate space for +/- 10 Hz
sum1=0.
sum2=0.
ns=0
nns=0
do i=-ia,ia
j=i
if(j.lt.0) j=i+nfft
@ -869,12 +873,12 @@ contains
f=i*df
if(f.ge.-4.0 .and. f.le.-2.0) then
sum1=sum1 + ss(i) !Power between -2 and -4 Hz
ns=ns+1
nns=nns+1
else if(f.ge.2.0 .and. f.le.4.0) then
sum2=sum2 + ss(i) !Power between +2 and +4 Hz
endif
enddo
avg=min(sum1/ns,sum2/ns) !Compute avg from smaller sum
avg=min(sum1/nns,sum2/nns) !Compute avg from smaller sum
sum1=0.
do i=-ia,ia

3
lib/ft8/foxgen.f90
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@ -15,7 +15,8 @@ subroutine foxgen()
! common block.
parameter (NN=79,ND=58,NSPS=4*1920)
parameter (NWAVE=14278656,NFFT=614400,NH=NFFT/2)
parameter (NWAVE=(160+2)*134400) !the biggest waveform we generate (FST240-1800)
parameter (NFFT=614400,NH=NFFT/2)
character*40 cmsg
character*37 msg,msgsent
integer itone(79)

2
lib/ft8/foxgen_wrap.f90
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@ -1,7 +1,7 @@
subroutine foxgen_wrap(msg40,msgbits,itone)
parameter (NN=79,ND=58,KK=77,NSPS=4*1920)
parameter (NWAVE=NN*NSPS)
parameter (NWAVE=(160+2)*134400) !the biggest waveform we generate (FST240-1800)
character*40 msg40,cmsg
character*12 mycall12

10
widgets/mainwindow.cpp
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@ -428,7 +428,7 @@ MainWindow::MainWindow(QDir const& temp_directory, bool multiple,
ui->dxGridEntry->setValidator (new MaidenheadLocatorValidator {this});
ui->dxCallEntry->setValidator (new CallsignValidator {this});
ui->sbTR->values ({5, 10, 15, 30, 60, 120, 300});
ui->sbTR_FST240W->values ({15, 30, 60, 120, 300});
ui->sbTR_FST240W->values ({15, 30, 60, 120, 300, 900, 1800});
ui->decodedTextBrowser->set_configuration (&m_config, true);
ui->decodedTextBrowser2->set_configuration (&m_config);
@ -3556,6 +3556,8 @@ void MainWindow::guiUpdate()
if(m_TRperiod==60) txDuration=1.0 + 160*3888/12000.0;
if(m_TRperiod==120) txDuration=1.0 + 160*8200/12000.0;
if(m_TRperiod==300) txDuration=1.0 + 160*21504/12000.0;
if(m_TRperiod==900) txDuration=1.0 + 160*66560/12000.0;
if(m_TRperiod==1800) txDuration=1.0 + 160*134400/12000.0;
}
if(m_modeTx=="ISCAT" or m_mode=="MSK144" or m_bFast9) {
txDuration=m_TRperiod-0.25; // ISCAT, JT9-fast, MSK144
@ -3888,6 +3890,8 @@ void MainWindow::guiUpdate()
if(m_TRperiod==60) nsps=3888;
if(m_TRperiod==120) nsps=8200;
if(m_TRperiod==300) nsps=21504;
if(m_TRperiod==900) nsps=66560;
if(m_TRperiod==1800) nsps=134400;
nsps=4*nsps; //48000 Hz sampling
int nsym=160;
float fsample=48000.0;
@ -5838,7 +5842,7 @@ void MainWindow::on_actionFST240_triggered()
// 0123456789012345678901234567890123
displayWidgets(nWidgets("1111110001001111000100000001000000"));
setup_status_bar (bVHF);
ui->sbTR->values ({15, 30, 60, 120, 300});
ui->sbTR->values ({15, 30, 60, 120, 300, 900, 1800});
on_sbTR_valueChanged (ui->sbTR->value());
ui->cbAutoSeq->setChecked(true);
m_wideGraph->setMode(m_mode);
@ -7183,6 +7187,8 @@ void MainWindow::transmit (double snr)
if(m_TRperiod==60) nsps=3888;
if(m_TRperiod==120) nsps=8200;
if(m_TRperiod==300) nsps=21504;
if(m_TRperiod==900) nsps=66560;
if(m_TRperiod==1800) nsps=134400;
int hmod=int(pow(2.0,double(m_nSubMode)));
double dfreq=hmod*12000.0/nsps;
double f0=ui->WSPRfreqSpinBox->value() - m_XIT + 1.5*dfreq;