X-Git-Url: https://git.gag.com/?p=debian%2Fgnuradio;a=blobdiff_plain;f=gr-atsc%2Fsrc%2Flib%2Fatsci_equalizer_lms.h;fp=gr-atsc%2Fsrc%2Flib%2Fatsci_equalizer_lms.h;h=1626da234b411cd6f033de1870d6c61164eb5f35;hp=0000000000000000000000000000000000000000;hb=35e43e8d8c271e6842191cac3fc3f2f88a861183;hpb=ea29b08aeb54227e6628f655ccfdb96fe4d8c378

diff --git a/gr-atsc/src/lib/atsci_equalizer_lms.h b/gr-atsc/src/lib/atsci_equalizer_lms.h
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+++ b/gr-atsc/src/lib/atsci_equalizer_lms.h
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+/* -*- 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_LMS_H_
+#define _ATSC_EQUALIZER_LMS_H_
+
+#include <atsci_equalizer.h>
+#include <vector>
+#include <stdio.h>
+
+class atsci_equalizer_lms : public atsci_equalizer
+{
+public:
+  atsci_equalizer_lms ();
+  virtual ~atsci_equalizer_lms ();
+
+  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;
+
+  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_LMS_H_ */