Merge branch 'upstream' into dfsg-orig

[debian/gnuradio] / gr-atsc / src / lib / atsci_equalizer_lms2.h

diff --git a/gr-atsc/src/lib/atsci_equalizer_lms2.h b/gr-atsc/src/lib/atsci_equalizer_lms2.h
new file mode 100644 (file)
index 0000000..45b25b7
--- /dev/null
+++ b/gr-atsc/src/lib/atsci_equalizer_lms2.h
@@ -0,0 +1,79 @@
+/* -*- 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.
+ */
+
+#ifndef _ATSC_EQUALIZER_LMS2_H_
+#define _ATSC_EQUALIZER_LMS2_H_
+
+#include <atsci_equalizer.h>
+#include <vector>
+#include <stdio.h>
+
+class atsci_equalizer_lms2 : public atsci_equalizer
+{
+public:
+  atsci_equalizer_lms2 ();
+  virtual ~atsci_equalizer_lms2 ();
+
+  virtual void reset ();
+  virtual int ntaps () const;
+  virtual int npretaps () const;
+  
+protected:
+  FILE *trainingfile;
+  virtual void filter_normal (const float *input_samples,
+                             float *output_samples,
+                             int   nsamples);
+
+  virtual void filter_data_seg_sync (const float *input_samples,
+                                    float *output_samples,
+                                    int   nsamples,
+                                    int   offset);
+  
+  virtual void filter_field_sync (const float *input_samples,
+                                 float *output_samples,
+                                 int   nsamples,
+                                 int   offset,
+                                 int   which_field);
+
+private:
+  std::vector<double>  d_taps_ff;
+  std::vector<double>  d_taps_fb;
+  std::vector<float>   d_old_output;
+
+  int d_output_ptr;
+
+  void filterN (const float *input_samples,
+               float *output_samples,
+               int nsamples);
+
+  void adaptN (const float *input_samples,
+              const float *training_pattern,
+              float *output_samples,
+              int    nsamples);
+
+  float filter1 (const float input[]);
+  float adapt1 (const float input[], float ideal_output);
+
+};
+
+
+#endif /* _ATSC_EQUALIZER_LMS2_H_ */