Morphing toward a usable WSJT-X with JT8 modes.

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@2594 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

jt8.txt

@@ -0,0 +1,31 @@
+JT8 is a mode designed for amateur QSOs and beacon-like transmissions
+at MF and LF.  The mode uses the same 72-bit user messages as JT65,
+augmented by a 12-bit cyclic redundancy check (CRC).  Error-control
+coding uses a convolutional code with constraint length K=16, rate
+r=1/2, and a zero tail, leading to an encoded message length of
+(72+12+15)*2 = 198 bits.  Modulation is 8-FSK, so a transmission
+requires 198/3 = 66 information-carrying channel symbols.  Two 8x8
+Costas arrays are added to each transmission for purposes of time and
+frequency synchronization.  A full transmission thus contains 66 + 16
+= 82 symbols.  Tone spacing df of the 8-FSK modulation is equal to the
+keying rate; symbol duration tsym = 1/df, and the total occupied
+bandwidth is 8*df.  The actual transmission length TxT is slightly
+less than the T/R sequence time, to allow for possible message
+decoding before the next transmission starts.
+
+Parameters of the five JT8 sub-modes are summarized in the following
+table, along with S/N thresholds measured by simulation on an AWGN
+(additive white Gaussian noise) channel.  Parameter nsps is the number
+of samples per symbol at sample rate 1500 Hz.
+
+-----------------------------------------------------
+Mode   T/R    TxT    nsps    df    tsym   BW    S/N*
+       (m)    (s)           (Hz)    (s)  (Hz)   (dB)
+-----------------------------------------------------
+JT8-1    1    52.5    960  1.562   0.64  12.6  -26.9
+JT8-2    2   112.0   2048  0.732   1.37   5.9  -30.2
+JT8-5    5   293.9   5376  0.279   3.58   2.2  -34.4
+JT8-10  10   587.8  10752  0.140   7.17   1.1  -37.5
+JT8-30  30  1791.3  32768  0.046  21.85   0.4  -42.3
+-----------------------------------------------------
+* Noise power measured in a 2500 Hz bandwidth.

libm65/genjt8.f90

@@ -0,0 +1,96 @@
+subroutine genjt8(message,iwave,nwave,nbit,msgsent)
+
+! Generate a JT8 wavefile.
+
+  parameter (NMAX=60*12000)     !Max length of wave file
+  character*24 message          !Message to be generated
+  character*24 msgsent          !Message as it will be received
+  character cmode*5
+  real*8 t,dt,phi,f,f0,dfgen,dphi,twopi,tsymbol
+  integer*2 iwave(NMAX)         !Generated wave file
+  integer iu(3)
+  integer gsym(372)             !372 is needed for JT8 mode
+  integer sent(144)
+  integer ic8(8)
+  data ic8/3,6,2,4,5,0,7,1/
+  data nsps/4096/
+  data twopi/6.283185307d0/
+  save
+
+  cmode='JT8'                                   !### temp ? ###
+  call srcenc(cmode,message,nbit,iu)
+! In JT8 mode, message length is always nbit=78
+  if(nbit.ne.78) then
+     print*,'genjt8, nbit=',nbit
+     stop
+  endif
+
+! Apply FEC and do the channel encoding
+  call chenc(cmode,nbit,iu,gsym)
+
+! Remove source encoding, recover the human-readable message.
+  call srcdec(cmode,nbit,iu,msgsent)
+
+! Insert 8x8 Costas array at beginning and end of array sent().
+  sent(1:8)=ic8
+  sent(135:142)=ic8
+! Insert two symbols after each Costas array to specify message length.
+  if(nbit.eq.30) then
+     sent(9)=2
+     sent(10)=2
+     sent(143)=2
+     sent(144)=2
+  else if(nbit.eq.48) then
+     sent(9)=3
+     sent(10)=3
+     sent(143)=3
+     sent(144)=3
+  else
+     sent(9)=6
+     sent(10)=6
+     sent(143)=6
+     sent(144)=6
+  endif
+
+! Insert the 3-bit data symbols
+  sent(11:134)=gsym(1:124)
+
+! Use the four free symbols in 30-bit mode
+  if(nbit.eq.30) then
+     sent(121)=sent(20)
+     sent(122)=sent(45)
+     sent(123)=sent(70)
+     sent(124)=sent(95)
+  endif
+
+! Set up necessary constants
+  nsym=144
+  tsymbol=nsps/12000.d0
+  dt=1.d0/12000.d0
+  f0=1270.46d0
+  dfgen=12000.d0/nsps
+  t=0.d0
+  phi=0.d0
+  k=0
+  j0=0
+  ndata=(nsym*12000.d0*tsymbol)/2
+  ndata=2*ndata
+  do i=1,ndata
+     t=t+dt
+     j=int(t/tsymbol) + 1                    !Symbol number, 1-nsym
+     if(j.ne.j0) then
+        f=f0
+        k=k+1
+        if(k.le.144) f=f0+(sent(k))*dfgen         !### Fix need for this ###
+        dphi=twopi*dt*f
+        j0=j
+     endif
+     phi=phi+dphi
+     iwave(i)=32767.0*sin(phi)
+  enddo
+
+  iwave(ndata+1:)=0
+  nwave=ndata+6000                          !0.5 s buffer before CW ID
+
+  return
+end subroutine genjt8

mainwindow.cpp

@@ -42,9 +42,11 @@ MainWindow::MainWindow(QWidget *parent) :
   ui->actionBlue->setActionGroup(paletteGroup);
 
   QActionGroup* modeGroup = new QActionGroup(this);
-  ui->actionJT65A->setActionGroup(modeGroup);
+  ui->actionJT8_1->setActionGroup(modeGroup);
-  ui->actionJT65B->setActionGroup(modeGroup);
+  ui->actionJT8_2->setActionGroup(modeGroup);
-  ui->actionJT65C->setActionGroup(modeGroup);
+  ui->actionJT8_5->setActionGroup(modeGroup);
+  ui->actionJT8_10->setActionGroup(modeGroup);
+  ui->actionJT8_30->setActionGroup(modeGroup);
 
   QActionGroup* saveGroup = new QActionGroup(this);
   ui->actionSave_all->setActionGroup(saveGroup);
@@ -94,7 +96,7 @@ MainWindow::MainWindow(QWidget *parent) :
   m_myCall="K1JT";
   m_myGrid="FN20qi";
   m_appDir = QApplication::applicationDirPath();
-  m_saveDir="/users/joe/wsjt-x/install/save";
+  m_saveDir="/users/joe/wsjtx/install/save";
   m_txFreq=125;
   m_setftx=0;
   m_loopall=false;
@@ -106,7 +108,8 @@ MainWindow::MainWindow(QWidget *parent) :
   m_RxLog=1;                     //Write Date and Time to RxLog
   m_nutc0=9999;
   m_NB=false;
-  m_mode="JTMSK";
+  m_mode="JT8-1";
+  m_TRperiod=60;
   m_colors="000066ff0000ffff00969696646464";
 
   ui->xThermo->setFillBrush(Qt::green);
@@ -126,8 +129,13 @@ MainWindow::MainWindow(QWidget *parent) :
       border-style: outset; border-width: 1px; border-radius: 5px; \
       border-color: black; min-width: 5em; padding: 3px;}";
 
-  genStdMsgs("26");
+  genStdMsgs("-30");
   on_actionWide_Waterfall_triggered();                   //###
+  if(m_mode=="JT8-1") on_actionJT8_1_triggered();
+  if(m_mode=="JT8-2") on_actionJT8_2_triggered();
+  if(m_mode=="JT8-5") on_actionJT8_5_triggered();
+  if(m_mode=="JT8-10") on_actionJT8_10_triggered();
+  if(m_mode=="JT8-30") on_actionJT8_30_triggered();
 
   future1 = new QFuture<void>;
   watcher1 = new QFutureWatcher<void>;
@@ -194,7 +202,7 @@ MainWindow::~MainWindow()
 //-------------------------------------------------------- writeSettings()
 void MainWindow::writeSettings()
 {
-  QString inifile = m_appDir + "/wsjt-x.ini";
+  QString inifile = m_appDir + "/wsjtx.ini";
   QSettings settings(inifile, QSettings::IniFormat);
 
   settings.beginGroup("MainWindow");
@@ -261,7 +269,7 @@ void MainWindow::writeSettings()
 //---------------------------------------------------------- readSettings()
 void MainWindow::readSettings()
 {
-  QString inifile = m_appDir + "/wsjt-x.ini";
+  QString inifile = m_appDir + "/wsjtx.ini";
   QSettings settings(inifile, QSettings::IniFormat);
   settings.beginGroup("MainWindow");
   restoreGeometry(settings.value("geometry").toByteArray());
@@ -307,7 +315,7 @@ void MainWindow::readSettings()
                                  "PaletteAFMHot",false).toBool());
   ui->actionBlue->setChecked(settings.value(
                                  "PaletteBlue",false).toBool());
-  m_mode=settings.value("Mode","JTMSK").toString();
+  m_mode=settings.value("Mode","JT8-1").toString();
   ui->actionNone->setChecked(settings.value("SaveNone",true).toBool());
   ui->actionSave_all->setChecked(settings.value("SaveAll",false).toBool());
   m_saveAll=ui->actionSave_all->isChecked();
@@ -556,13 +564,13 @@ void MainWindow::keyPressEvent( QKeyEvent *e )                //keyPressEvent
     break;
   case Qt::Key_G:
     if(e->modifiers() & Qt::AltModifier) {
-      genStdMsgs("26");
+      genStdMsgs("-30");
       break;
     }
   case Qt::Key_L:
     if(e->modifiers() & Qt::ControlModifier) {
       lookup();
-      genStdMsgs("26");
+      genStdMsgs("-30");
       break;
     }
   }
@@ -616,13 +624,13 @@ void MainWindow::createStatusBar()                           //createStatusBar
   lab3->setFrameStyle(QFrame::Panel | QFrame::Sunken);
   statusBar()->addWidget(lab3);
 
-  /*
   lab4 = new QLabel("");
   lab4->setAlignment(Qt::AlignHCenter);
   lab4->setMinimumSize(QSize(80,10));
   lab4->setFrameStyle(QFrame::Panel | QFrame::Sunken);
   statusBar()->addWidget(lab4);
 
+/*
   lab5 = new QLabel("");
   lab5->setAlignment(Qt::AlignHCenter);
   lab5->setMinimumSize(QSize(50,10));
@@ -898,19 +906,18 @@ void MainWindow::guiUpdate()
   static char msgsent[29];
   static int nsendingsh=0;
   int khsym=0;
-  double trperiod=30.0;
 
   double tx1=0.0;
-  double tx2=trperiod;
+  double tx2=m_TRperiod;
 
   if(!m_txFirst) {
-    tx1 += trperiod;
+    tx1 += m_TRperiod;
-    tx2 += trperiod;
+    tx2 += m_TRperiod;
   }
   qint64 ms = QDateTime::currentMSecsSinceEpoch() % 86400000;
   int nsec=ms/1000;
   double tsec=0.001*ms;
-  double t2p=fmod(tsec,2*trperiod);
+  double t2p=fmod(tsec,2*m_TRperiod);
   bool bTxTime = t2p >= tx1 && t2p < tx2;
 
   if(m_auto) {
@@ -948,7 +955,7 @@ void MainWindow::guiUpdate()
     int len1=28;
     genmsk_(message,iwave,&nwave,len1);
     if(m_restart) {
-      QFile f("wsjt-x_tx.log");
+      QFile f("wsjtx_tx.log");
       f.open(QIODevice::WriteOnly | QIODevice::Text | QIODevice::Append);
       QTextStream out(&f);
       out << QDateTime::currentDateTimeUtc().toString("yyyy-MMM-dd hh:mm")
@@ -969,7 +976,7 @@ void MainWindow::guiUpdate()
     btxok=true;
     m_transmitting=true;
 
-    QFile f("wsjt-x_tx.log");
+    QFile f("wsjtx_tx.log");
     f.open(QIODevice::WriteOnly | QIODevice::Text | QIODevice::Append);
     QTextStream out(&f);
     out << QDateTime::currentDateTimeUtc().toString("yyyy-MMM-dd hh:mm")
@@ -1010,7 +1017,6 @@ void MainWindow::guiUpdate()
   }
 
   if(nsec != m_sec0) {                                     //Once per second
-
     if(m_transmitting) {
       if(nsendingsh==1) {
         lab1->setStyleSheet("QLabel{background-color: #66ffff}");
@@ -1158,7 +1164,7 @@ void MainWindow::doubleClickOnCall(QString hiscall, bool ctrl)
   QString rpt="";
   if(ctrl) rpt=t2.mid(23,3);
   lookup();
-  rpt="26";
+  rpt="-30";
   genStdMsgs(rpt);
   if(t2.indexOf(m_myCall)>0) {
     m_ntx=2;
@@ -1408,7 +1414,7 @@ void MainWindow::on_dxGridEntry_textChanged(const QString &t) //dxGrid changed
 
 void MainWindow::on_genStdMsgsPushButton_clicked()         //genStdMsgs button
 {
-  genStdMsgs("26");
+  genStdMsgs("-30");
 }
 
 void MainWindow::on_logQSOButton_clicked()                 //Log QSO button
@@ -1433,10 +1439,10 @@ void MainWindow::on_logQSOButton_clicked()                 //Log QSO button
 void MainWindow::on_actionErase_wsjtx_rx_log_triggered()     //Erase Rx log
 {
   int ret = QMessageBox::warning(this, "Confirm Erase",
-      "Are you sure you want to erase file wsjt-x_rx.log ?",
+      "Are you sure you want to erase file wsjtx_rx.log ?",
        QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes);
   if(ret==QMessageBox::Yes) {
-    m_RxLog |= 2;                      // Rewind wsjt-x_rx.log
+    m_RxLog |= 2;                      // Rewind wsjtx_rx.log
   }
 }
 */
@@ -1444,10 +1450,70 @@ void MainWindow::on_actionErase_wsjtx_rx_log_triggered()     //Erase Rx log
 void MainWindow::on_actionErase_wsjtx_tx_log_triggered()     //Erase Tx log
 {
   int ret = QMessageBox::warning(this, "Confirm Erase",
-      "Are you sure you want to erase file wsjt-x_tx.log ?",
+      "Are you sure you want to erase file wsjtx_tx.log ?",
        QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes);
   if(ret==QMessageBox::Yes) {
-    QFile f("wsjt-x_tx.log");
+    QFile f("wsjtx_tx.log");
     f.remove();
   }
 }
+
+void MainWindow::on_actionJT8_1_triggered()
+{
+  m_mode="JT8-1";
+  m_TRperiod=60;
+  soundInThread.setPeriod(m_TRperiod);
+  soundOutThread.setPeriod(m_TRperiod);
+  g_pWideGraph->setPeriod(m_TRperiod);
+  lab4->setStyleSheet("QLabel{background-color: #ff6ec7}");
+  lab4->setText(m_mode);
+  ui->actionJT8_1->setChecked(true);
+}
+
+void MainWindow::on_actionJT8_2_triggered()
+{
+  m_mode="JT8-2";
+  m_TRperiod=120;
+  soundInThread.setPeriod(m_TRperiod);
+  soundOutThread.setPeriod(m_TRperiod);
+  g_pWideGraph->setPeriod(m_TRperiod);
+  lab4->setStyleSheet("QLabel{background-color: #ffff00}");
+  lab4->setText(m_mode);
+  ui->actionJT8_2->setChecked(true);
+}
+
+void MainWindow::on_actionJT8_5_triggered()
+{
+  m_mode="JT8-5";
+  m_TRperiod=300;
+  soundInThread.setPeriod(m_TRperiod);
+  soundOutThread.setPeriod(m_TRperiod);
+  g_pWideGraph->setPeriod(m_TRperiod);
+  lab4->setStyleSheet("QLabel{background-color: #ffa500}");
+  lab4->setText(m_mode);
+  ui->actionJT8_5->setChecked(true);
+}
+
+void MainWindow::on_actionJT8_10_triggered()
+{
+  m_mode="JT8-10";
+  m_TRperiod=600;
+  soundInThread.setPeriod(m_TRperiod);
+  soundOutThread.setPeriod(m_TRperiod);
+  g_pWideGraph->setPeriod(m_TRperiod);
+  lab4->setStyleSheet("QLabel{background-color: #7fff00}");
+  lab4->setText(m_mode);
+  ui->actionJT8_10->setChecked(true);
+}
+
+void MainWindow::on_actionJT8_30_triggered()
+{
+  m_mode="JT8-30";
+  m_TRperiod=1800;
+  soundInThread.setPeriod(m_TRperiod);
+  soundOutThread.setPeriod(m_TRperiod);
+  g_pWideGraph->setPeriod(m_TRperiod);
+  lab4->setStyleSheet("QLabel{background-color: #97ffff}");
+  lab4->setText(m_mode);
+  ui->actionJT8_30->setChecked(true);
+}

mainwindow.h

@@ -98,11 +98,21 @@ private slots:
   void on_genStdMsgsPushButton_clicked();
   void bumpDF(int n);
   void on_logQSOButton_clicked();
-//  void on_actionErase_wsjt-x_rx_log_triggered();
+//  void on_actionErase_wsjtx_rx_log_triggered();
   void on_actionErase_wsjtx_tx_log_triggered();
   void on_actionAFMHot_triggered();
   void on_actionBlue_triggered();
 
+  void on_actionJT8_2_triggered();
+
+  void on_actionJT8_1_triggered();
+
+  void on_actionJT8_5_triggered();
+
+  void on_actionJT8_30_triggered();
+
+  void on_actionJT8_10_triggered();
+
 private:
     Ui::MainWindow *ui;
     qint32  m_nDevIn;
@@ -133,6 +143,7 @@ private:
     qint32  m_adjustIQ;
     qint32  m_applyIQcal;
     qint32  m_mult570;
+    qint32  m_TRperiod;
 
     double  m_fAdd;
     double  m_IQamp;

mainwindow.ui

@@ -1126,6 +1126,11 @@ p, li { white-space: pre-wrap; }
     <property name="title">
      <string>Mode</string>
     </property>
+    <addaction name="actionJT8_1"/>
+    <addaction name="actionJT8_2"/>
+    <addaction name="actionJT8_5"/>
+    <addaction name="actionJT8_10"/>
+    <addaction name="actionJT8_30"/>
    </widget>
    <addaction name="menuFile"/>
    <addaction name="menuSetup"/>
@@ -1469,6 +1474,46 @@ p, li { white-space: pre-wrap; }
     <string>FUNcube Dongle Settings</string>
    </property>
   </action>
+  <action name="actionJT8_1">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>JT8-1</string>
+   </property>
+  </action>
+  <action name="actionJT8_2">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>JT8-2</string>
+   </property>
+  </action>
+  <action name="actionJT8_5">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>JT8-5</string>
+   </property>
+  </action>
+  <action name="actionJT8_10">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>JT8-10</string>
+   </property>
+  </action>
+  <action name="actionJT8_30">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>JT8-30</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <customwidgets>

soundin.cpp

@@ -156,6 +156,10 @@ void SoundInThread::setMonitoring(bool b)                    //setMonitoring()
   m_monitoring = b;
 }
 
+void SoundInThread::setPeriod(int n)
+{
+  m_TRperiod=n;
+}
 
 int SoundInThread::mstep()
 {

soundin.h

@@ -26,6 +26,7 @@ public:
 
   void setInputDevice(qint32 n);
   void setMonitoring(bool b);
+  void setPeriod(int n);
   int  mstep();
 
 signals:
@@ -41,6 +42,8 @@ private:
   bool   m_monitoring;
   qint32 m_step;
   qint32 m_nDevIn;
+  qint32 m_TRperiod;
+  qint32 m_TRperiod0;
 
 };
 

soundout.cpp

@@ -103,3 +103,8 @@ void SoundOutThread::setOutputDevice(int n)      //setOutputDevice()
   if (isRunning()) return;
   this->m_nDevOut=n;
 }
+
+void SoundOutThread::setPeriod(int n)
+{
+  m_TRperiod=n;
+}

soundout.h

@@ -25,6 +25,7 @@ public:
 
 public:
   void setOutputDevice(qint32 n);
+  void setPeriod(int n);
   bool quitExecution;           //If true, thread exits gracefully
 
 
@@ -33,6 +34,8 @@ private:
   qint32  m_nDevOut;            //Output device number
   bool    m_txOK;               //Enable Tx audio
   bool    m_txMute;             //Mute temporarily
+  qint32  m_TRperiod;           //T/R period (30 or 60 s)
+
 };
 
 #endif

widegraph.cpp

@@ -208,6 +208,11 @@ void WideGraph::setPalette(QString palette)
   ui->widePlot->setPalette(palette);
 }
 
+void WideGraph::setPeriod(int n)
+{
+  m_TRperiod=n;
+}
+
 void WideGraph::on_cbSpec2d_toggled(bool b)
 {
   ui->widePlot->set2Dspec(b);

widegraph.h

@@ -32,6 +32,7 @@ public:
   void   setFcal(int n);
   void   setPalette(QString palette);
   void   setMode65(int n);
+  void   setPeriod(int n);
 
   qint32 m_qsoFreq;
 
@@ -58,6 +59,7 @@ private:
   qint32 m_fCal;
   qint32 m_fSample;
   qint32 m_mode65;
+  qint32 m_TRperiod;
 
   Ui::WideGraph *ui;
 };