1 files changed, 0 insertions, 308 deletions
diff --git a/gr-atsc/lib/atsci_equalizer_lms.cc b/gr-atsc/lib/atsci_equalizer_lms.cc
deleted file mode 100644
index 5c09893b5b..0000000000
--- a/gr-atsc/lib/atsci_equalizer_lms.cc
+++ /dev/null
@@ -1,308 +0,0 @@
-/* -*- 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 3, 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., 51 Franklin Street,
- * Boston, MA 02110-1301, USA.
- */
-
-#include <gnuradio/atsc/equalizer_lms_impl.h>
-#include <assert.h>
-#include <algorithm>
-#include <gnuradio/atsc/pnXXX_impl.h>
-
-#include <stdio.h>
-
-using std::min;
-using std::max;
-
-static const int	NTAPS = 256;
-static const int	NPRETAPS = (int) (NTAPS * 0.8);	// probably should be either .2 or .8
-
-
-// the length of the field sync pattern that we know unequivocally
-static const int KNOWN_FIELD_SYNC_LENGTH = 4 + 511 + 3 * 63;
-
-// static const float *get_data_seg_sync_training_sequence (int offset);
-static int          get_field_sync_training_sequence_length (int offset);
-static const float *get_field_sync_training_sequence (int which_field, int offset);
-
-
-atsci_equalizer_lms::atsci_equalizer_lms () : d_taps (NTAPS)
-{
-  for (int i = 0; i < NTAPS; i++) {
-    d_taps[i] = 0.0;
-  }
-  trainingfile=fopen("taps.txt","w");
-}
-
-atsci_equalizer_lms::~atsci_equalizer_lms ()
-{
-  fclose(trainingfile);
-}
-
-void
-atsci_equalizer_lms::reset ()
-{
-  atsci_equalizer::reset ();		// invoke superclass
-
-  for (int i = 0; i < NTAPS; i++) {
-    d_taps[i] = 0.0;
-  }
-}
-
-int
-atsci_equalizer_lms::ntaps () const
-{
-  return NTAPS;
-}
-
-int
-atsci_equalizer_lms::npretaps () const
-{
-  return NPRETAPS;
-}
-
-/*!
- * Input range is known NOT TO CONTAIN data segment syncs
- * or field syncs.  This should be the fast path.  In the
- * non decicion directed case, this just runs the input
- * through the filter without adapting it.
- *
- * \p input_samples has (nsamples + ntaps() - 1) valid entries.
- * input_samples[0] .. input_samples[nsamples - 1 + ntaps() - 1] may be
- * referenced to compute the output values.
- */
-void
-atsci_equalizer_lms::filter_normal (const float *input_samples,
-				   float *output_samples,
-				   int   nsamples)
-{
-  // handle data
-  filterN (input_samples, output_samples, nsamples);
-}
-
-
-/*!
- * Input range is known to consist of only a data segment sync or a
- * portion of a data segment sync.  \p nsamples will be in [1,4].
- * \p offset will be in [0,3].  \p offset is the offset of the input
- * from the beginning of the data segment sync pattern.
- *
- * \p input_samples has (nsamples + ntaps() - 1) valid entries.
- * input_samples[0] .. input_samples[nsamples - 1 + ntaps() - 1] may be
- * referenced to compute the output values.
- */
-void
-atsci_equalizer_lms::filter_data_seg_sync (const float *input_samples,
-					  float *output_samples,
-					  int   nsamples,
-					  int   offset)
-{
-  // handle data
-  //  adaptN (input_samples, get_data_seg_sync_training_sequence (offset),
-  //	  output_samples, nsamples);
- filterN (input_samples, output_samples, nsamples);
-
- //  cerr << "Seg Sync: offset " << offset << "\tnsamples\t" << nsamples << "\t pre, 5 -5 -5 5\t" <<
- // output_samples[0] << "\t" << output_samples[1] << "\t" << output_samples[2] << "\t" << output_samples[3] << endl;
-
-}
-
-
-/*!
- * Input range is known to consist of only a field sync segment or a
- * portion of a field sync segment.  \p nsamples will be in [1,832].
- * \p offset will be in [0,831].  \p offset is the offset of the input
- * from the beginning of the data segment sync pattern.  We consider the
- * 4 symbols of the immediately preceding data segment sync to be the
- * first symbols of the field sync segment.  \p which_field is in [0,1]
- * and specifies which field (duh).
- *
- * \p input_samples has (nsamples + ntaps() - 1) valid entries.
- * input_samples[0] .. input_samples[nsamples - 1 + ntaps() - 1] may be
- * referenced to compute the output values.
- */
-void
-atsci_equalizer_lms::filter_field_sync (const float *input_samples,
-				       float *output_samples,
-				       int   nsamples,
-				       int   offset,
-				       int   which_field)
-{
-  // Only the first 4 + 511 + 3 * 63 symbols are completely defined.
-  // Those after that the symbols are bilevel, so we could use decision feedback and use
-  // that to train, but for now, don't train on them.
-
-  int	n = min (nsamples, get_field_sync_training_sequence_length (offset));
-
-  // handle known training sequence
-  adaptN (input_samples, get_field_sync_training_sequence (which_field, offset),
-		    output_samples, n);
-
-  // just filter any unknown portion
-  if (nsamples > n)
-    filterN (&input_samples[n], &output_samples[n], nsamples - n);
-
-  if (offset == 0 && nsamples > 0){
-    for (int i = 0; i < NTAPS; i++)
-      fprintf(trainingfile,"%f ",d_taps[i]);
-
-    fprintf (trainingfile,"\n");
-  }
-
-}
-
-// ----------------------------------------------------------------
-
-//
-// filter a single output
-//
-float
-atsci_equalizer_lms::filter1 (const float input[])
-{
-  static const int N_UNROLL = 4;
-
-  float	acc0 = 0;
-  float	acc1 = 0;
-  float	acc2 = 0;
-  float	acc3 = 0;
-
-
-  unsigned	i = 0;
-  unsigned	n = (NTAPS / N_UNROLL) * N_UNROLL;
-
-  for (i = 0; i < n; i += N_UNROLL){
-    acc0 += d_taps[i + 0] * input[i + 0];
-    acc1 += d_taps[i + 1] * input[i + 1];
-    acc2 += d_taps[i + 2] * input[i + 2];
-    acc3 += d_taps[i + 3] * input[i + 3];
-  }
-
-  for (; i < (unsigned) NTAPS; i++)
-    acc0 += d_taps[i] * input[i];
-
-  return (acc0 + acc1 + acc2 + acc3);
-}
-
-//
-// filter and adapt a single output
-//
-float
-atsci_equalizer_lms::adapt1 (const float input[], float ideal_output)
-{
-  static const double BETA = 0.00005;	// FIXME figure out what this ought to be
-					// FIXME add gear-shifting
-
-  double y = filter1 (input);
-  double e = y - ideal_output;
-
-  // update taps...
-  for (int i = 0; i < NTAPS; i++){
-    d_taps[i] = d_taps[i] - BETA * e * (double)(input[i]);
-  }
-
-  return y;
-}
-
-void
-atsci_equalizer_lms::filterN (const float *input_samples,
-			     float *output_samples,
-			     int nsamples)
-{
-  for (int i = 0; i < nsamples; i++)
-    output_samples[i] = filter1 (&input_samples[i]);
-}
-
-
-void
-atsci_equalizer_lms::adaptN (const float *input_samples,
-			    const float *training_pattern,
-			    float *output_samples,
-			    int    nsamples)
-{
-  for (int i = 0; i < nsamples; i++)
-    output_samples[i] = adapt1 (&input_samples[i], training_pattern[i]);
-}
-
-// ----------------------------------------------------------------
-
-static float
-bin_map (int bit)
-{
-  return bit ? +5 : -5;
-}
-
-static void
-init_field_sync_common (float *p, int mask)
-
-{
-  int  i = 0;
-
-  p[i++] = bin_map (1);			// data segment sync pulse
-  p[i++] = bin_map (0);
-  p[i++] = bin_map (0);
-  p[i++] = bin_map (1);
-
-  for (int j = 0; j < 511; j++)		// PN511
-    p[i++] = bin_map (atsc_pn511[j]);
-
-  for (int j = 0; j < 63; j++)		// PN63
-    p[i++] = bin_map (atsc_pn63[j]);
-
-  for (int j = 0; j < 63; j++)		// PN63, toggled on field 2
-    p[i++] = bin_map (atsc_pn63[j] ^ mask);
-
-  for (int j = 0; j < 63; j++)		// PN63
-    p[i++] = bin_map (atsc_pn63[j]);
-
-  assert (i == KNOWN_FIELD_SYNC_LENGTH);
-}
-
-#if 0
-static const float *
-get_data_seg_sync_training_sequence (int offset)
-{
-  static const float training_data[4] = { +5, -5, -5, +5 };
-  return &training_data[offset];
-}
-#endif
-
-static int
-get_field_sync_training_sequence_length (int offset)
-{
-  return max (0, KNOWN_FIELD_SYNC_LENGTH - offset);
-}
-
-static const float *
-get_field_sync_training_sequence (int which_field, int offset)
-{
-  static float *field_1 = 0;
-  static float *field_2 = 0;
-
-  if (field_1 == 0){
-    field_1 = new float[KNOWN_FIELD_SYNC_LENGTH];
-    field_2 = new float[KNOWN_FIELD_SYNC_LENGTH];
-    init_field_sync_common (field_1, 0);
-    init_field_sync_common (field_2, 1);
-  }
-
-  if (which_field == 0)
-    return &field_1[offset];
-  else
-    return &field_2[offset];
-}