From 319caa5a3882142be42e03b0f20488730f5d208e Mon Sep 17 00:00:00 2001
From: eb
Date: Sat, 19 Aug 2006 07:36:33 +0000
Subject: set svn:eol-style=native

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3355 221aa14e-8319-0410-a670-987f0aec2ac5
---
 gr-trellis/src/lib/base.cc        | 184 +++++------
 gr-trellis/src/lib/base.h         |  76 ++---
 gr-trellis/src/lib/fsm.cc         | 646 +++++++++++++++++++-------------------
 gr-trellis/src/lib/fsm.h          | 126 ++++----
 gr-trellis/src/lib/interleaver.cc | 216 ++++++-------
 gr-trellis/src/lib/interleaver.h  |  94 +++---
 6 files changed, 671 insertions(+), 671 deletions(-)

diff --git a/gr-trellis/src/lib/base.cc b/gr-trellis/src/lib/base.cc
index 35ba2ea1d..ca532ab08 100644
--- a/gr-trellis/src/lib/base.cc
+++ b/gr-trellis/src/lib/base.cc
@@ -1,92 +1,92 @@
-/* -*- c++ -*- */
-/*
- * Copyright 2002 Free Software Foundation, Inc.
- *
- * This file is part of GNU Radio
- *
- * GNU Radio is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * GNU Radio is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GNU Radio; see the file COPYING.  If not, write to
- * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-#include <cstdio>
-#include <stdexcept>
-#include <cmath>
-#include "base.h"
-
-
-bool dec2base(unsigned int num, int base, std::vector<int> &s)
-{
-  int l = s.size();
-  unsigned int n=num;
-  for(int i=0;i<l;i++) {
-    s[l-i-1] = n % base; //MSB first
-    n /= base;
-  }
-  if(n!=0) {
-    printf("Number %d requires more than %d digits.",num,l);
-    return false;
-  }
-  else
-    return true;
-}
-
-
-unsigned int base2dec(const std::vector<int> &s, int base)
-{
-  int l = s.size();
-  unsigned int num=0;
-  for(int i=0;i<l;i++)
-      num=num*base+s[i];
-  return num;
-}
-
-
-bool dec2bases(unsigned int num, const std::vector<int> &bases, std::vector<int> &s)
-{
-  int l = s.size();
-  unsigned int n=num;
-  for(int i=0;i<l;i++) {
-      s[l-i-1] = n % bases[l-i-1];
-      n /= bases[l-i-1];
-  }
-  if(n!=0) {
-    printf("Number %d requires more than %d digits.",num,l);
-    return false;
-  }
-  else
-    return true;
-}
-
-
-
-unsigned int bases2dec(const std::vector<int> &s, const std::vector<int> &bases)
-{
-  int l = s.size();
-  unsigned int num=0;
-  for(int i=0;i<l;i++)
-      num = num * bases[i] + s[i];
-  return num;
-}
-
-
-
-
-
-
-
-
-
-
-
+/* -*- c++ -*- */
+/*
+ * Copyright 2002 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <cstdio>
+#include <stdexcept>
+#include <cmath>
+#include "base.h"
+
+
+bool dec2base(unsigned int num, int base, std::vector<int> &s)
+{
+  int l = s.size();
+  unsigned int n=num;
+  for(int i=0;i<l;i++) {
+    s[l-i-1] = n % base; //MSB first
+    n /= base;
+  }
+  if(n!=0) {
+    printf("Number %d requires more than %d digits.",num,l);
+    return false;
+  }
+  else
+    return true;
+}
+
+
+unsigned int base2dec(const std::vector<int> &s, int base)
+{
+  int l = s.size();
+  unsigned int num=0;
+  for(int i=0;i<l;i++)
+      num=num*base+s[i];
+  return num;
+}
+
+
+bool dec2bases(unsigned int num, const std::vector<int> &bases, std::vector<int> &s)
+{
+  int l = s.size();
+  unsigned int n=num;
+  for(int i=0;i<l;i++) {
+      s[l-i-1] = n % bases[l-i-1];
+      n /= bases[l-i-1];
+  }
+  if(n!=0) {
+    printf("Number %d requires more than %d digits.",num,l);
+    return false;
+  }
+  else
+    return true;
+}
+
+
+
+unsigned int bases2dec(const std::vector<int> &s, const std::vector<int> &bases)
+{
+  int l = s.size();
+  unsigned int num=0;
+  for(int i=0;i<l;i++)
+      num = num * bases[i] + s[i];
+  return num;
+}
+
+
+
+
+
+
+
+
+
+
+
diff --git a/gr-trellis/src/lib/base.h b/gr-trellis/src/lib/base.h
index b0fe3e91d..4c8dbf135 100644
--- a/gr-trellis/src/lib/base.h
+++ b/gr-trellis/src/lib/base.h
@@ -1,38 +1,38 @@
-/* -*- c++ -*- */
-/*
- * Copyright 2002 Free Software Foundation, Inc.
- *
- * This file is part of GNU Radio
- *
- * GNU Radio is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * GNU Radio is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GNU Radio; see the file COPYING.  If not, write to
- * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-#ifndef INCLUDED_TRELLIS_BASE_H
-#define INCLUDED_TRELLIS_BASE_H
-
-#include <vector>
-
-/*!
- * \brief  change base
- */
-
-
-bool dec2base(unsigned int num, int base, std::vector<int> &s);
-bool dec2bases(unsigned int num, const std::vector<int> &bases, std::vector<int> &s);
-unsigned int base2dec(const std::vector<int> &s, int base);
-unsigned int bases2dec(const std::vector<int> &s, const std::vector<int> &bases);
-
-#endif
+/* -*- c++ -*- */
+/*
+ * Copyright 2002 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef INCLUDED_TRELLIS_BASE_H
+#define INCLUDED_TRELLIS_BASE_H
+
+#include <vector>
+
+/*!
+ * \brief  change base
+ */
+
+
+bool dec2base(unsigned int num, int base, std::vector<int> &s);
+bool dec2bases(unsigned int num, const std::vector<int> &bases, std::vector<int> &s);
+unsigned int base2dec(const std::vector<int> &s, int base);
+unsigned int bases2dec(const std::vector<int> &s, const std::vector<int> &bases);
+
+#endif
diff --git a/gr-trellis/src/lib/fsm.cc b/gr-trellis/src/lib/fsm.cc
index f34308834..2cf1a6d5a 100644
--- a/gr-trellis/src/lib/fsm.cc
+++ b/gr-trellis/src/lib/fsm.cc
@@ -1,323 +1,323 @@
-/* -*- c++ -*- */
-/*
- * Copyright 2002 Free Software Foundation, Inc.
- *
- * This file is part of GNU Radio
- *
- * GNU Radio is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * GNU Radio is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GNU Radio; see the file COPYING.  If not, write to
- * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-#include <cstdio>
-#include <stdexcept>
-#include <cmath>
-#include "base.h"
-#include "fsm.h"
-
-
-fsm::fsm()
-{
-  d_I=0;
-  d_S=0;
-  d_O=0;
-  d_NS.resize(0);
-  d_OS.resize(0);
-  d_PS.resize(0);
-  d_PI.resize(0);
-  d_TMi.resize(0);
-  d_TMl.resize(0);
-}
-
-fsm::fsm(const fsm &FSM)
-{
-  d_I=FSM.I();
-  d_S=FSM.S();
-  d_O=FSM.O();
-  d_NS=FSM.NS();
-  d_OS=FSM.OS();
-  d_PS=FSM.PS();
-  d_PI=FSM.PI();
-  d_TMi=FSM.TMi();
-  d_TMl=FSM.TMl();
-}
-
-fsm::fsm(int I, int S, int O, const std::vector<int> &NS, const std::vector<int> &OS)
-{
-  d_I=I;
-  d_S=S;
-  d_O=O;
-  d_NS=NS;
-  d_OS=OS;
- 
-  generate_PS_PI();
-  generate_TM();
-}
-
-//######################################################################
-//# Read an FSM specification from a file.
-//# Format (hopefully will become more flexible in the future...):
-//# I S O (in the first line)
-//# blank line
-//# Next state matrix (S lines, each with I integers separated by spaces)
-//# blank line
-//# output symbol matrix (S lines, each with I integers separated by spaces)
-//# optional comments
-//######################################################################
-fsm::fsm(const char *name) 
-{
-  FILE *fsmfile;
-
-  if((fsmfile=fopen(name,"r"))==NULL) 
-    throw std::runtime_error ("fsm::fsm(const char *name): file open error\n");
-    //printf("file open error in fsm()\n");
-  
-  fscanf(fsmfile,"%d %d %d\n",&d_I,&d_S,&d_O);
-  d_NS.resize(d_I*d_S);
-  d_OS.resize(d_I*d_S);
-
-  for(int i=0;i<d_S;i++) {
-    for(int j=0;j<d_I;j++) fscanf(fsmfile,"%d",&(d_NS[i*d_I+j]));
-  }
-  for(int i=0;i<d_S;i++) {
-    for(int j=0;j<d_I;j++) fscanf(fsmfile,"%d",&(d_OS[i*d_I+j]));
-  }
- 
-  generate_PS_PI();
-  generate_TM();
-}
-
-
-
-
-//######################################################################
-//# Automatically generate the FSM from the generator matrix
-//# of a (n,k) binary convolutional code
-//######################################################################
-fsm::fsm(int k, int n, const std::vector<int> &G)
-{
-
-  // calculate maximum memory requirements for each input stream
-  std::vector<int> max_mem_x(k,-1);
-  int max_mem = -1;
-  for(int i=0;i<k;i++) {
-    for(int j=0;j<n;j++) {
-      int mem = -1;
-      if(G[i*n+j]!=0)
-        mem=(int)(log(G[i*n+j])/log(2.0));
-      if(mem>max_mem_x[i])
-        max_mem_x[i]=mem;
-      if(mem>max_mem)
-        max_mem=mem;
-    }
-  }
-  
-//printf("max_mem_x\n");
-//for(int j=0;j<max_mem_x.size();j++) printf("%d ",max_mem_x[j]); printf("\n");
-
-  // calculate total memory requirements to set S
-  int sum_max_mem = 0;
-  for(int i=0;i<k;i++)
-    sum_max_mem += max_mem_x[i];
-
-//printf("sum_max_mem = %d\n",sum_max_mem);
-
-  d_I=1<<k;
-  d_S=1<<sum_max_mem;
-  d_O=1<<n;
- 
-  // binary representation of the G matrix
-  std::vector<std::vector<int> > Gb(k*n);
-  for(int j=0;j<k*n;j++) {
-    Gb[j].resize(max_mem+1);
-    dec2base(G[j],2,Gb[j]);
-//printf("Gb\n");
-//for(int m=0;m<Gb[j].size();m++) printf("%d ",Gb[j][m]); printf("\n");
-  }
-
-  // alphabet size of each shift register 
-  std::vector<int> bases_x(k);
-  for(int j=0;j<k ;j++) 
-    bases_x[j] = 1 << max_mem_x[j];
-//printf("bases_x\n");
-//for(int j=0;j<max_mem_x.size();j++) printf("%d ",max_mem_x[j]); printf("\n");
-
-  d_NS.resize(d_I*d_S);
-  d_OS.resize(d_I*d_S);
-
-  std::vector<int> sx(k);
-  std::vector<int> nsx(k);
-  std::vector<int> tx(k);
-  std::vector<std::vector<int> > tb(k);
-  for(int j=0;j<k;j++)
-    tb[j].resize(max_mem+1);
-  std::vector<int> inb(k);
-  std::vector<int> outb(n);
-
-
-  for(int s=0;s<d_S;s++) {
-    dec2bases(s,bases_x,sx); // split s into k values, each representing on of the k shift registers
-//printf("state = %d \nstates = ",s);
-//for(int j=0;j<sx.size();j++) printf("%d ",sx[j]); printf("\n");
-    for(int i=0;i<d_I;i++) {
-      dec2base(i,2,inb); // input in binary
-//printf("input = %d \ninputs = ",i);
-//for(int j=0;j<inb.size();j++) printf("%d ",inb[j]); printf("\n");
-
-      // evaluate next state
-      for(int j=0;j<k;j++)
-        nsx[j] = (inb[j]*bases_x[j]+sx[j])/2; // next state (for each shift register) MSB first
-      d_NS[s*d_I+i]=bases2dec(nsx,bases_x); // collect all values into the new state
-
-      // evaluate transitions
-      for(int j=0;j<k;j++)
-        tx[j] = inb[j]*bases_x[j]+sx[j]; // transition (for each shift register)MSB first
-      for(int j=0;j<k;j++) {
-        dec2base(tx[j],2,tb[j]); // transition in binary
-//printf("transition = %d \ntransitions = ",tx[j]);
-//for(int m=0;m<tb[j].size();m++) printf("%d ",tb[j][m]); printf("\n");
-      }
-
-      // evaluate outputs
-      for(int nn=0;nn<n;nn++) {
-        outb[nn] = 0;
-        for(int j=0;j<k;j++) {
-          for(int m=0;m<max_mem+1;m++)
-            outb[nn] = (outb[nn] + Gb[j*n+nn][m]*tb[j][m]) % 2; // careful: polynomial 1+D ir represented as 110, not as 011
-//printf("output %d equals %d\n",nn,outb[nn]);
-        }
-      }
-      d_OS[s*d_I+i] = base2dec(outb,2);
-    }
-  }
-
-  generate_PS_PI();
-  generate_TM();
-}
-
-
-
-
-//######################################################################
-//# Automatically generate an FSM specification describing the 
-//# ISI for a channel
-//# of length ch_length and a modulation of size mod_size
-//######################################################################
-fsm::fsm(int mod_size, int ch_length)
-{
-  d_I=mod_size;
-  d_S=(int) (pow(1.0*d_I,1.0*ch_length-1)+0.5);
-  d_O=d_S*d_I;
-
-  d_NS.resize(d_I*d_S);
-  d_OS.resize(d_I*d_S);
-
-  for(int s=0;s<d_S;s++) {
-    for(int i=0;i<d_I;i++) { 
-      int t=i*d_S+s;
-      d_NS[s*d_I+i] = t/d_I;
-      d_OS[s*d_I+i] = t;
-    }
-  }
- 
-  generate_PS_PI();
-  generate_TM();
-}
-
-
-//######################################################################
-//# generate the PS and PI tables for later use
-//######################################################################
-void fsm::generate_PS_PI()
-{
-  d_PS.resize(d_I*d_S);
-  d_PI.resize(d_I*d_S);
-
-  for(int i=0;i<d_S;i++) {
-    int j=0;
-    for(int ii=0;ii<d_S;ii++) for(int jj=0;jj<d_I;jj++) {
-      if(d_NS[ii*d_I+jj]!=i) continue;
-      d_PS[i*d_I+j]=ii;
-      d_PI[i*d_I+j]=jj;
-      j++;
-    }
-  }
-}
-
-
-//######################################################################
-//# generate the termination matrices TMl and TMi for later use
-//######################################################################
-void fsm::generate_TM()
-{
-  d_TMi.resize(d_S*d_S);
-  d_TMl.resize(d_S*d_S);
-
-  for(int i=0;i<d_S*d_S;i++) {
-    d_TMi[i] = -1; // no meaning
-    d_TMl[i] = d_S; //infinity: you need at most S-1 steps
-    if (i/d_S == i%d_S)
-      d_TMl[i] = 0;
-  }
-
-  for(int s=0;s<d_S;s++) {
-    bool done = false;
-    int attempts = 0;
-    while (done == false && attempts < d_S-1) {
-      done = find_es(s);
-      attempts ++;
-    }
-    if (done == false)
-      //throw std::runtime_error ("fsm::generate_TM(): FSM appears to be disconnected\n");
-      printf("fsm::generate_TM(): FSM appears to be disconnected\n");
-  }
-}
-
-
-// find a path from any state to the ending state "es"
-bool fsm::find_es(int es)
-{
-  bool done = true;
-  for(int s=0;s<d_S;s++) {
-    if(d_TMl[s*d_S+es] < d_S) 
-      continue;
-    int minl=d_S;
-    int mini=-1;
-    for(int i=0;i<d_I;i++) {
-      if( 1 + d_TMl[d_NS[s*d_I+i]*d_S+es] < minl) {
-        minl = 1 + d_TMl[d_NS[s*d_I+i]*d_S+es];
-        mini = i;
-      }
-    }
-    if (mini != -1) {
-      d_TMl[s*d_S+es]=minl;
-      d_TMi[s*d_S+es]=mini;
-    }
-    else
-      done = false;
-  }
-  return done;
-}
-
-
-
-
-
-
-
-
-
-
-
-
+/* -*- c++ -*- */
+/*
+ * Copyright 2002 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <cstdio>
+#include <stdexcept>
+#include <cmath>
+#include "base.h"
+#include "fsm.h"
+
+
+fsm::fsm()
+{
+  d_I=0;
+  d_S=0;
+  d_O=0;
+  d_NS.resize(0);
+  d_OS.resize(0);
+  d_PS.resize(0);
+  d_PI.resize(0);
+  d_TMi.resize(0);
+  d_TMl.resize(0);
+}
+
+fsm::fsm(const fsm &FSM)
+{
+  d_I=FSM.I();
+  d_S=FSM.S();
+  d_O=FSM.O();
+  d_NS=FSM.NS();
+  d_OS=FSM.OS();
+  d_PS=FSM.PS();
+  d_PI=FSM.PI();
+  d_TMi=FSM.TMi();
+  d_TMl=FSM.TMl();
+}
+
+fsm::fsm(int I, int S, int O, const std::vector<int> &NS, const std::vector<int> &OS)
+{
+  d_I=I;
+  d_S=S;
+  d_O=O;
+  d_NS=NS;
+  d_OS=OS;
+ 
+  generate_PS_PI();
+  generate_TM();
+}
+
+//######################################################################
+//# Read an FSM specification from a file.
+//# Format (hopefully will become more flexible in the future...):
+//# I S O (in the first line)
+//# blank line
+//# Next state matrix (S lines, each with I integers separated by spaces)
+//# blank line
+//# output symbol matrix (S lines, each with I integers separated by spaces)
+//# optional comments
+//######################################################################
+fsm::fsm(const char *name) 
+{
+  FILE *fsmfile;
+
+  if((fsmfile=fopen(name,"r"))==NULL) 
+    throw std::runtime_error ("fsm::fsm(const char *name): file open error\n");
+    //printf("file open error in fsm()\n");
+  
+  fscanf(fsmfile,"%d %d %d\n",&d_I,&d_S,&d_O);
+  d_NS.resize(d_I*d_S);
+  d_OS.resize(d_I*d_S);
+
+  for(int i=0;i<d_S;i++) {
+    for(int j=0;j<d_I;j++) fscanf(fsmfile,"%d",&(d_NS[i*d_I+j]));
+  }
+  for(int i=0;i<d_S;i++) {
+    for(int j=0;j<d_I;j++) fscanf(fsmfile,"%d",&(d_OS[i*d_I+j]));
+  }
+ 
+  generate_PS_PI();
+  generate_TM();
+}
+
+
+
+
+//######################################################################
+//# Automatically generate the FSM from the generator matrix
+//# of a (n,k) binary convolutional code
+//######################################################################
+fsm::fsm(int k, int n, const std::vector<int> &G)
+{
+
+  // calculate maximum memory requirements for each input stream
+  std::vector<int> max_mem_x(k,-1);
+  int max_mem = -1;
+  for(int i=0;i<k;i++) {
+    for(int j=0;j<n;j++) {
+      int mem = -1;
+      if(G[i*n+j]!=0)
+        mem=(int)(log(G[i*n+j])/log(2.0));
+      if(mem>max_mem_x[i])
+        max_mem_x[i]=mem;
+      if(mem>max_mem)
+        max_mem=mem;
+    }
+  }
+  
+//printf("max_mem_x\n");
+//for(int j=0;j<max_mem_x.size();j++) printf("%d ",max_mem_x[j]); printf("\n");
+
+  // calculate total memory requirements to set S
+  int sum_max_mem = 0;
+  for(int i=0;i<k;i++)
+    sum_max_mem += max_mem_x[i];
+
+//printf("sum_max_mem = %d\n",sum_max_mem);
+
+  d_I=1<<k;
+  d_S=1<<sum_max_mem;
+  d_O=1<<n;
+ 
+  // binary representation of the G matrix
+  std::vector<std::vector<int> > Gb(k*n);
+  for(int j=0;j<k*n;j++) {
+    Gb[j].resize(max_mem+1);
+    dec2base(G[j],2,Gb[j]);
+//printf("Gb\n");
+//for(int m=0;m<Gb[j].size();m++) printf("%d ",Gb[j][m]); printf("\n");
+  }
+
+  // alphabet size of each shift register 
+  std::vector<int> bases_x(k);
+  for(int j=0;j<k ;j++) 
+    bases_x[j] = 1 << max_mem_x[j];
+//printf("bases_x\n");
+//for(int j=0;j<max_mem_x.size();j++) printf("%d ",max_mem_x[j]); printf("\n");
+
+  d_NS.resize(d_I*d_S);
+  d_OS.resize(d_I*d_S);
+
+  std::vector<int> sx(k);
+  std::vector<int> nsx(k);
+  std::vector<int> tx(k);
+  std::vector<std::vector<int> > tb(k);
+  for(int j=0;j<k;j++)
+    tb[j].resize(max_mem+1);
+  std::vector<int> inb(k);
+  std::vector<int> outb(n);
+
+
+  for(int s=0;s<d_S;s++) {
+    dec2bases(s,bases_x,sx); // split s into k values, each representing on of the k shift registers
+//printf("state = %d \nstates = ",s);
+//for(int j=0;j<sx.size();j++) printf("%d ",sx[j]); printf("\n");
+    for(int i=0;i<d_I;i++) {
+      dec2base(i,2,inb); // input in binary
+//printf("input = %d \ninputs = ",i);
+//for(int j=0;j<inb.size();j++) printf("%d ",inb[j]); printf("\n");
+
+      // evaluate next state
+      for(int j=0;j<k;j++)
+        nsx[j] = (inb[j]*bases_x[j]+sx[j])/2; // next state (for each shift register) MSB first
+      d_NS[s*d_I+i]=bases2dec(nsx,bases_x); // collect all values into the new state
+
+      // evaluate transitions
+      for(int j=0;j<k;j++)
+        tx[j] = inb[j]*bases_x[j]+sx[j]; // transition (for each shift register)MSB first
+      for(int j=0;j<k;j++) {
+        dec2base(tx[j],2,tb[j]); // transition in binary
+//printf("transition = %d \ntransitions = ",tx[j]);
+//for(int m=0;m<tb[j].size();m++) printf("%d ",tb[j][m]); printf("\n");
+      }
+
+      // evaluate outputs
+      for(int nn=0;nn<n;nn++) {
+        outb[nn] = 0;
+        for(int j=0;j<k;j++) {
+          for(int m=0;m<max_mem+1;m++)
+            outb[nn] = (outb[nn] + Gb[j*n+nn][m]*tb[j][m]) % 2; // careful: polynomial 1+D ir represented as 110, not as 011
+//printf("output %d equals %d\n",nn,outb[nn]);
+        }
+      }
+      d_OS[s*d_I+i] = base2dec(outb,2);
+    }
+  }
+
+  generate_PS_PI();
+  generate_TM();
+}
+
+
+
+
+//######################################################################
+//# Automatically generate an FSM specification describing the 
+//# ISI for a channel
+//# of length ch_length and a modulation of size mod_size
+//######################################################################
+fsm::fsm(int mod_size, int ch_length)
+{
+  d_I=mod_size;
+  d_S=(int) (pow(1.0*d_I,1.0*ch_length-1)+0.5);
+  d_O=d_S*d_I;
+
+  d_NS.resize(d_I*d_S);
+  d_OS.resize(d_I*d_S);
+
+  for(int s=0;s<d_S;s++) {
+    for(int i=0;i<d_I;i++) { 
+      int t=i*d_S+s;
+      d_NS[s*d_I+i] = t/d_I;
+      d_OS[s*d_I+i] = t;
+    }
+  }
+ 
+  generate_PS_PI();
+  generate_TM();
+}
+
+
+//######################################################################
+//# generate the PS and PI tables for later use
+//######################################################################
+void fsm::generate_PS_PI()
+{
+  d_PS.resize(d_I*d_S);
+  d_PI.resize(d_I*d_S);
+
+  for(int i=0;i<d_S;i++) {
+    int j=0;
+    for(int ii=0;ii<d_S;ii++) for(int jj=0;jj<d_I;jj++) {
+      if(d_NS[ii*d_I+jj]!=i) continue;
+      d_PS[i*d_I+j]=ii;
+      d_PI[i*d_I+j]=jj;
+      j++;
+    }
+  }
+}
+
+
+//######################################################################
+//# generate the termination matrices TMl and TMi for later use
+//######################################################################
+void fsm::generate_TM()
+{
+  d_TMi.resize(d_S*d_S);
+  d_TMl.resize(d_S*d_S);
+
+  for(int i=0;i<d_S*d_S;i++) {
+    d_TMi[i] = -1; // no meaning
+    d_TMl[i] = d_S; //infinity: you need at most S-1 steps
+    if (i/d_S == i%d_S)
+      d_TMl[i] = 0;
+  }
+
+  for(int s=0;s<d_S;s++) {
+    bool done = false;
+    int attempts = 0;
+    while (done == false && attempts < d_S-1) {
+      done = find_es(s);
+      attempts ++;
+    }
+    if (done == false)
+      //throw std::runtime_error ("fsm::generate_TM(): FSM appears to be disconnected\n");
+      printf("fsm::generate_TM(): FSM appears to be disconnected\n");
+  }
+}
+
+
+// find a path from any state to the ending state "es"
+bool fsm::find_es(int es)
+{
+  bool done = true;
+  for(int s=0;s<d_S;s++) {
+    if(d_TMl[s*d_S+es] < d_S) 
+      continue;
+    int minl=d_S;
+    int mini=-1;
+    for(int i=0;i<d_I;i++) {
+      if( 1 + d_TMl[d_NS[s*d_I+i]*d_S+es] < minl) {
+        minl = 1 + d_TMl[d_NS[s*d_I+i]*d_S+es];
+        mini = i;
+      }
+    }
+    if (mini != -1) {
+      d_TMl[s*d_S+es]=minl;
+      d_TMi[s*d_S+es]=mini;
+    }
+    else
+      done = false;
+  }
+  return done;
+}
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/gr-trellis/src/lib/fsm.h b/gr-trellis/src/lib/fsm.h
index 01703e35f..511eb0e9d 100644
--- a/gr-trellis/src/lib/fsm.h
+++ b/gr-trellis/src/lib/fsm.h
@@ -1,63 +1,63 @@
-/* -*- c++ -*- */
-/*
- * Copyright 2002 Free Software Foundation, Inc.
- *
- * This file is part of GNU Radio
- *
- * GNU Radio is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * GNU Radio is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GNU Radio; see the file COPYING.  If not, write to
- * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-#ifndef INCLUDED_TRELLIS_FSM_H
-#define INCLUDED_TRELLIS_FSM_H
-
-#include <vector>
-
-/*!
- * \brief  FSM class
- */
-class fsm {
-private:
-  int d_I;
-  int d_S;
-  int d_O;
-  std::vector<int> d_NS;
-  std::vector<int> d_OS;
-  std::vector<int> d_PS;
-  std::vector<int> d_PI;
-  std::vector<int> d_TMi;
-  std::vector<int> d_TMl;
-  void generate_PS_PI ();
-  void generate_TM ();
-  bool find_es(int es);
-public:
-  fsm();
-  fsm(const fsm &FSM);
-  fsm(int I, int S, int O, const std::vector<int> &NS, const std::vector<int> &OS);
-  fsm(const char *name);
-  fsm(int k, int n, const std::vector<int> &G);
-  fsm(int mod_size, int ch_length);
-  int I () const { return d_I; }
-  int S () const { return d_S; }
-  int O () const { return d_O; }
-  const std::vector<int> & NS () const { return d_NS; }
-  const std::vector<int> & OS () const { return d_OS; }
-  const std::vector<int> & PS () const { return d_PS; }
-  const std::vector<int> & PI () const { return d_PI; }
-  const std::vector<int> & TMi () const { return d_TMi; }
-  const std::vector<int> & TMl () const { return d_TMl; }
-};
-
-#endif
+/* -*- c++ -*- */
+/*
+ * Copyright 2002 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef INCLUDED_TRELLIS_FSM_H
+#define INCLUDED_TRELLIS_FSM_H
+
+#include <vector>
+
+/*!
+ * \brief  FSM class
+ */
+class fsm {
+private:
+  int d_I;
+  int d_S;
+  int d_O;
+  std::vector<int> d_NS;
+  std::vector<int> d_OS;
+  std::vector<int> d_PS;
+  std::vector<int> d_PI;
+  std::vector<int> d_TMi;
+  std::vector<int> d_TMl;
+  void generate_PS_PI ();
+  void generate_TM ();
+  bool find_es(int es);
+public:
+  fsm();
+  fsm(const fsm &FSM);
+  fsm(int I, int S, int O, const std::vector<int> &NS, const std::vector<int> &OS);
+  fsm(const char *name);
+  fsm(int k, int n, const std::vector<int> &G);
+  fsm(int mod_size, int ch_length);
+  int I () const { return d_I; }
+  int S () const { return d_S; }
+  int O () const { return d_O; }
+  const std::vector<int> & NS () const { return d_NS; }
+  const std::vector<int> & OS () const { return d_OS; }
+  const std::vector<int> & PS () const { return d_PS; }
+  const std::vector<int> & PI () const { return d_PI; }
+  const std::vector<int> & TMi () const { return d_TMi; }
+  const std::vector<int> & TMl () const { return d_TMl; }
+};
+
+#endif
diff --git a/gr-trellis/src/lib/interleaver.cc b/gr-trellis/src/lib/interleaver.cc
index 174d31c0b..b17fae54c 100644
--- a/gr-trellis/src/lib/interleaver.cc
+++ b/gr-trellis/src/lib/interleaver.cc
@@ -1,108 +1,108 @@
-/* -*- c++ -*- */
-/*
- * Copyright 2002 Free Software Foundation, Inc.
- *
- * This file is part of GNU Radio
- *
- * GNU Radio is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * GNU Radio is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GNU Radio; see the file COPYING.  If not, write to
- * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-#include <cstdlib> 
-#include <cstdio>
-#include <iostream>
-#include <stdexcept>
-#include <cmath>
-#include "quicksort_index.h"
-#include "interleaver.h"
-
-interleaver::interleaver()
-{
-  d_K=0;
-  d_INTER.resize(0);
-  d_DEINTER.resize(0);
-}
-
-interleaver::interleaver(const interleaver &INTERLEAVER)
-{
-  d_K=INTERLEAVER.K();
-  d_INTER=INTERLEAVER.INTER();
-  d_DEINTER=INTERLEAVER.DEINTER();
-}
-
-interleaver::interleaver(int K, const std::vector<int> &INTER)
-{
-  d_K=K;
-  d_INTER=INTER;
-  d_DEINTER.resize(d_K);
-  
-  // generate DEINTER table
-  for(int i=0;i<d_K;i++) {
-    d_DEINTER[d_INTER[i]]=i;
-  }
-}
-
-//######################################################################
-//# Read an INTERLEAVER specification from a file.
-//# Format (hopefully will become more flexible in the future...):
-//# K
-//# blank line
-//# list of space separated K integers from 0 to K-1 in appropriate order
-//# optional comments
-//######################################################################
-interleaver::interleaver(const char *name) 
-{
-  FILE *interleaverfile;
-
-  if((interleaverfile=fopen(name,"r"))==NULL) 
-    throw std::runtime_error ("file open error in interleaver()");
-    //printf("file open error in interleaver()\n");
-  
-  fscanf(interleaverfile,"%d\n",&d_K);
-  d_INTER.resize(d_K);
-  d_DEINTER.resize(d_K);
-
-  for(int i=0;i<d_K;i++) fscanf(interleaverfile,"%d",&(d_INTER[i]));
-  
-  // generate DEINTER table
-  for(int i=0;i<d_K;i++) {
-    d_DEINTER[d_INTER[i]]=i;
-  }
-}
-
-//######################################################################
-//# Generate a random interleaver
-//######################################################################
-interleaver::interleaver(int K, unsigned int seed)
-{
-  d_K=K;
-  d_INTER.resize(d_K);
-  d_DEINTER.resize(d_K);
-
-  srand(seed); 
-  std::vector<int> tmp(d_K);
-  for(int i=0;i<d_K;i++) {
-    d_INTER[i]=i;
-    tmp[i] = rand(); 
-  }
-  //quicksort_index <int> (tmp,d_INTER,0,d_K-1); got to resolve this...
-  quicksort_index1 (tmp,d_INTER,0,d_K-1);
-
-  // generate DEINTER table
-  for(int i=0;i<d_K;i++) {
-    d_DEINTER[d_INTER[i]]=i;
-  }
-}
-
+/* -*- c++ -*- */
+/*
+ * Copyright 2002 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <cstdlib> 
+#include <cstdio>
+#include <iostream>
+#include <stdexcept>
+#include <cmath>
+#include "quicksort_index.h"
+#include "interleaver.h"
+
+interleaver::interleaver()
+{
+  d_K=0;
+  d_INTER.resize(0);
+  d_DEINTER.resize(0);
+}
+
+interleaver::interleaver(const interleaver &INTERLEAVER)
+{
+  d_K=INTERLEAVER.K();
+  d_INTER=INTERLEAVER.INTER();
+  d_DEINTER=INTERLEAVER.DEINTER();
+}
+
+interleaver::interleaver(int K, const std::vector<int> &INTER)
+{
+  d_K=K;
+  d_INTER=INTER;
+  d_DEINTER.resize(d_K);
+  
+  // generate DEINTER table
+  for(int i=0;i<d_K;i++) {
+    d_DEINTER[d_INTER[i]]=i;
+  }
+}
+
+//######################################################################
+//# Read an INTERLEAVER specification from a file.
+//# Format (hopefully will become more flexible in the future...):
+//# K
+//# blank line
+//# list of space separated K integers from 0 to K-1 in appropriate order
+//# optional comments
+//######################################################################
+interleaver::interleaver(const char *name) 
+{
+  FILE *interleaverfile;
+
+  if((interleaverfile=fopen(name,"r"))==NULL) 
+    throw std::runtime_error ("file open error in interleaver()");
+    //printf("file open error in interleaver()\n");
+  
+  fscanf(interleaverfile,"%d\n",&d_K);
+  d_INTER.resize(d_K);
+  d_DEINTER.resize(d_K);
+
+  for(int i=0;i<d_K;i++) fscanf(interleaverfile,"%d",&(d_INTER[i]));
+  
+  // generate DEINTER table
+  for(int i=0;i<d_K;i++) {
+    d_DEINTER[d_INTER[i]]=i;
+  }
+}
+
+//######################################################################
+//# Generate a random interleaver
+//######################################################################
+interleaver::interleaver(int K, unsigned int seed)
+{
+  d_K=K;
+  d_INTER.resize(d_K);
+  d_DEINTER.resize(d_K);
+
+  srand(seed); 
+  std::vector<int> tmp(d_K);
+  for(int i=0;i<d_K;i++) {
+    d_INTER[i]=i;
+    tmp[i] = rand(); 
+  }
+  //quicksort_index <int> (tmp,d_INTER,0,d_K-1); got to resolve this...
+  quicksort_index1 (tmp,d_INTER,0,d_K-1);
+
+  // generate DEINTER table
+  for(int i=0;i<d_K;i++) {
+    d_DEINTER[d_INTER[i]]=i;
+  }
+}
+
diff --git a/gr-trellis/src/lib/interleaver.h b/gr-trellis/src/lib/interleaver.h
index 14ed80faf..8d7dbbeec 100644
--- a/gr-trellis/src/lib/interleaver.h
+++ b/gr-trellis/src/lib/interleaver.h
@@ -1,47 +1,47 @@
-/* -*- c++ -*- */
-/*
- * Copyright 2002 Free Software Foundation, Inc.
- *
- * This file is part of GNU Radio
- *
- * GNU Radio is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * GNU Radio is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GNU Radio; see the file COPYING.  If not, write to
- * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-#ifndef INCLUDED_TRELLIS_INTERLEAVER_H
-#define INCLUDED_TRELLIS_INTERLEAVER_H
-
-#include <vector>
-
-/*!
- * \brief  INTERLEAVER class
- */
-class interleaver {
-private:
-  int d_K;
-  std::vector<int> d_INTER;
-  std::vector<int> d_DEINTER;
-public:
-  interleaver();
-  interleaver(const interleaver & INTERLEAVER);
-  interleaver(int K, const std::vector<int> & INTER);
-  interleaver(const char *name);
-  interleaver(int K, unsigned int seed);
-  int K () const { return d_K; }
-  const std::vector<int> & INTER () const { return d_INTER; }
-  const std::vector<int> & DEINTER () const { return d_DEINTER; }
-};
-
-#endif
+/* -*- c++ -*- */
+/*
+ * Copyright 2002 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef INCLUDED_TRELLIS_INTERLEAVER_H
+#define INCLUDED_TRELLIS_INTERLEAVER_H
+
+#include <vector>
+
+/*!
+ * \brief  INTERLEAVER class
+ */
+class interleaver {
+private:
+  int d_K;
+  std::vector<int> d_INTER;
+  std::vector<int> d_DEINTER;
+public:
+  interleaver();
+  interleaver(const interleaver & INTERLEAVER);
+  interleaver(int K, const std::vector<int> & INTER);
+  interleaver(const char *name);
+  interleaver(int K, unsigned int seed);
+  int K () const { return d_K; }
+  const std::vector<int> & INTER () const { return d_INTER; }
+  const std::vector<int> & DEINTER () const { return d_DEINTER; }
+};
+
+#endif
-- 
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