Several enhancements to DXpedition mode:

1. Insert dummy report when Hound is called by complex-callsign Fox.
2. Allow Fox to transmit anywhere between 300 and 900 Hz.
3. Restrict randomized Hound freq to the range 1000 - 3000 Hz.
4. Suppress Fox signals that would be duplicates.


git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8376 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

commons.h

@@ -83,6 +83,7 @@ extern struct {
 extern struct {
   float wave[606720];
   int   nslots;
+  int   nfreq;
   int   i3bit[5];
   char  cmsg[5][40];
   char  mycall[12];

lib/ft8/foxfilt.f90

@@ -1,4 +1,4 @@
-subroutine foxfilt(nslots,width,wave)
+subroutine foxfilt(nslots,nfreq,width,wave)
 
   parameter (NN=79,ND=58,KK=87,NSPS=4*1920)
   parameter (NWAVE=NN*NSPS,NFFT=614400,NH=NFFT/2)
@@ -11,8 +11,8 @@ subroutine foxfilt(nslots,width,wave)
   x(NWAVE+1:)=0.
   call four2a(x,NFFT,1,-1,0)              !r2c
   df=48000.0/NFFT
-  fa=1800.0 - 0.5*6.25
+  fa=nfreq - 0.5*6.25
-  fb=1800.0 + 7.5*6.25 + (nslots-1)*60.0
+  fb=nfreq + 7.5*6.25 + (nslots-1)*60.0
   ia2=nint(fa/df)
   ib1=nint(fb/df)
   ia1=nint(ia2-width/df)

lib/ft8/foxgen.f90

@@ -31,7 +31,7 @@ subroutine foxgen()
   real x(NFFT)
   real*8 dt,twopi,f0,fstep,dfreq,phi,dphi
   complex cx(0:NH)
-  common/foxcom/wave(NWAVE),nslots,i3bit(5),cmsg(5),mycall(12)
+  common/foxcom/wave(NWAVE),nslots,nfreq,i3bit(5),cmsg(5),mycall(12)
   common/foxcom2/itone2(NN),msgbits2(KK)
   equivalence (x,cx),(y,cy)
   data icos7/2,5,6,0,4,1,3/                   !Costas 7x7 tone pattern
@@ -95,8 +95,7 @@ subroutine foxgen()
 ! Make copies of itone() and msgbits() for ft8sim
      itone2=itone
      msgbits2=msgbits
-
+     f0=nfreq + fstep*(n-1)
-     f0=1800.d0 + fstep*(n-1)
      phi=0.d0
      k=0
      do j=1,NN
@@ -128,7 +127,7 @@ subroutine foxgen()
 !  call plotspec(2,wave)          !Plot the spectrum
 
   width=50.0
-  call foxfilt(nslots,width,wave)
+  call foxfilt(nslots,nfreq,width,wave)
   peak3=maxval(abs(wave))
   wave=wave/peak3
 

lib/ft8/foxgen_wrap.f90

@@ -7,10 +7,11 @@ subroutine foxgen_wrap(msg40,msgbits,itone)
   character*12 mycall12
   integer*1 msgbits(KK),msgbits2
   integer itone(NN)
-  common/foxcom/wave(NWAVE),nslots,i3bit(5),cmsg(5),mycall12
+  common/foxcom/wave(NWAVE),nslots,nfreq,i3bit(5),cmsg(5),mycall12
   common/foxcom2/itone2(NN),msgbits2(KK)
 
   nslots=1
+  nfreq=300
   i1=index(msg40,'<')
   i2=index(msg40,'>')
   mycall12=msg40(i1+1:i2-1)//'    '

mainwindow.cpp

@@ -2941,6 +2941,7 @@ void MainWindow::readFromStdout()                             //readFromStdout
           }
         } else {
           QStringList w=decodedtext.string().mid(24).split(" ",QString::SkipEmptyParts);
+          if(decodedtext.string().contains("/")) w.append(" +00");  //Add a dummy report
           if(w.size()==3) {
             QString foxCall=w.at(1);
             if(w.at(0)==m_config.my_callsign()) {
@@ -3243,12 +3244,12 @@ void MainWindow::guiUpdate()
       icw[0]=m_ncw;
       g_iptt = 1;
       setRig ();
-      if(m_mode=="FT8" and m_config.bFox() and ui->TxFreqSpinBox->value() > 999) {
+      if(m_mode=="FT8" and m_config.bFox() and ui->TxFreqSpinBox->value() > 900) {
         ui->TxFreqSpinBox->setValue(300);
       }
       if(m_mode=="FT8" and m_config.bHound() and (ui->TxFreqSpinBox->value() < 999) and
          m_ntx != 3) {
-        int nf = (qrand() % 3000) + 1000;
+        int nf = (qrand() % 2000) + 1000;      // Hound randomized range: 1000-3000 Hz
         ui->TxFreqSpinBox->setValue(nf);
       }
       setXIT (ui->TxFreqSpinBox->value ());
@@ -3303,6 +3304,10 @@ void MainWindow::guiUpdate()
       }
       ba=msg2.toLatin1();
     } else {
+      if(m_config.bHound() and m_ntx!=3) {   //Hound transmits only Tx1 or Tx3
+        m_ntx=1;
+        ui->txrb1->setChecked(true);
+      }
       if(m_ntx == 1) ba=ui->tx1->text().toLocal8Bit();
       if(m_ntx == 2) ba=ui->tx2->text().toLocal8Bit();
       if(m_ntx == 3) ba=ui->tx3->text().toLocal8Bit();
@@ -7427,9 +7432,11 @@ void MainWindow::foxTxSequencer()
       fm = hc1 + " " + m_config.my_callsign();               //Tx msg
       m_fullFoxCallTime=now;
     }
+    if(islot>0 and fm==m_fm0) break;         //Suppress duplicate Fox signals
     islot++;
     //Generate tx waveform
     foxGenWaveform(islot-1,fm);
+    m_fm0=fm;
     if(islot >= m_Nslots) goto Transmit;
   }
 
@@ -7467,6 +7474,8 @@ void MainWindow::foxTxSequencer()
 
 Transmit:
   foxcom_.nslots=islot;
+  foxcom_.nfreq=ui->TxFreqSpinBox->value();
+  if(m_config.split_mode()) foxcom_.nfreq = foxcom_.nfreq + 1500;  //Fox Tx freq
   QString foxCall=m_config.my_callsign() + "         ";
   strncpy(&foxcom_.mycall[0], foxCall.toLatin1(),12);   //Copy Fox callsign into foxcom_
   foxgen_();
@@ -7531,12 +7540,10 @@ void MainWindow::foxGenWaveform(int i,QString fm)
   QString txModeArg;
   txModeArg.sprintf("FT8fox %d",i+1);
   ui->decodedTextBrowser2->displayTransmittedText(fm.trimmed(), txModeArg,
-        300+60*i,m_config.color_TxMsg(),m_bFastMode);
+        ui->TxFreqSpinBox->value()+60*i,m_config.color_TxMsg(),m_bFastMode);
-
   foxcom_.i3bit[i]=0;
   if(fm.indexOf("<")>0) foxcom_.i3bit[i]=1;
   strncpy(&foxcom_.cmsg[i][0],fm.toLatin1(),40);   //Copy this message into cmsg[i]
-//  qDebug() << "Fox Transmitting:" << i << fm.trimmed();
   writeFoxQSO(" Tx: " + fm.trimmed());
 }
 

mainwindow.h

@@ -565,6 +565,7 @@ private:
   QString m_CQtype;
   QString m_opCall;
   QString m_houndCallers;        //Sorted list of Hound callers
+  QString m_fm0;
 
   QSet<QString> m_pfx;
   QSet<QString> m_sfx;