Added gr-pager component to trunk by merging from r3474:r3537 in

branch developer/jcorgan/pager.  Currently implements most of the FLEX
pager protocol demodulation, but doesn't yet decode individual pages.


git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3538 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 58 insertions, 0 deletions

diff --git a/gr-pager/src/pager_slicer_fb.h b/gr-pager/src/pager_slicer_fb.h
new file mode 100644
index 000000000..052cb8263
--- /dev/null
+++ b/gr-pager/src/pager_slicer_fb.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2006 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., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_PAGER_SLICER_FB_H
+#define INCLUDED_PAGER_SLICER_FB_H
+
+#include <gr_sync_block.h>
+
+class pager_slicer_fb;
+typedef boost::shared_ptr<pager_slicer_fb> pager_slicer_fb_sptr;
+
+pager_slicer_fb_sptr pgr_make_slicer_fb(float alpha, float beta);
+
+/*!
+ * \brief slicer description
+ * \ingroup block
+ */
+class pager_slicer_fb : public gr_sync_block
+{
+private:
+    friend pager_slicer_fb_sptr pager_make_slicer_fb(float alpha, float beta);
+    pager_slicer_fb(float alpha, float beta);
+
+    unsigned char slice(float sample);
+
+    float d_alpha;      // Attack constant
+    float d_beta;       // Decay constant
+    float d_max;        // Maximum value for symbol comparison
+    float d_hi;         // High side decision boundary
+    float d_avg;        // Average value for DC offset subtraction
+    float d_lo;         // Low side decision boundary
+    float d_min;        // Minimum value for symbol comparison
+
+public:
+    int work (int noutput_items,
+              gr_vector_const_void_star &input_items, 
+              gr_vector_void_star &output_items);
+};
+
+#endif /* INCLUDED_PAGER_SLICER_FB_H */