gr-noaa: Switched to 'double rate BPSK' HRPT synchronization

[debian/gnuradio] / gr-noaa / lib / noaa_hrpt_sync_fb.cc

diff --git a/gr-noaa/lib/noaa_hrpt_sync_fb.cc b/gr-noaa/lib/noaa_hrpt_sync_fb.cc
deleted file mode 100644 (file)
index 9c655b0..0000000
--- a/gr-noaa/lib/noaa_hrpt_sync_fb.cc
+++ /dev/null
@@ -1,95 +0,0 @@
-/* -*- c++ -*- */
-/*
- * Copyright 2009 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.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <noaa_hrpt_sync_fb.h>
-#include <gr_io_signature.h>
-
-inline int signum(float f)
-{
-  return f >= 0.0 ? 1 : -1;
-}
-
-noaa_hrpt_sync_fb_sptr
-noaa_make_hrpt_sync_fb(float alpha, float beta, float sps, float max_offset)
-{
-  return gnuradio::get_initial_sptr(new noaa_hrpt_sync_fb(alpha, beta, sps, max_offset));
-}
-
-noaa_hrpt_sync_fb::noaa_hrpt_sync_fb(float alpha, float beta, float sps, float max_offset)
-  : gr_block("noaa_hrpt_sync_fb",
-            gr_make_io_signature(1, 1, sizeof(float)),
-            gr_make_io_signature(1, 1, sizeof(char))),
-    d_alpha(alpha), d_beta(beta), 
-    d_sps(sps), d_max_offset(max_offset),
-    d_phase(0.0), d_freq(1.0/sps),
-    d_last_sign(1)
-{
-}
-
-int
-noaa_hrpt_sync_fb::general_work(int noutput_items,
-                               gr_vector_int &ninput_items,
-                               gr_vector_const_void_star &input_items,
-                               gr_vector_void_star &output_items)
-{
-  int ninputs = ninput_items[0];
-  const float *in = (const float *)input_items[0];
-  char *out = (char *)output_items[0];
-
-  int i = 0, j = 0;
-  while (i < ninputs && j < noutput_items) {
-    float sample = in[i++];
-    int sign = signum(sample);
-    d_phase += d_freq;
-
-    // Train on zero crossings in center region of symbol
-    if (sign != d_last_sign) {
-      float phase_err = 0.0;
-      if (d_phase > 0.25 && d_phase < 0.75)
-       phase_err = d_phase-0.5;
-      else if (d_phase >= 0.75)
-       phase_err = d_phase - 1.0;
-      else
-       phase_err = d_phase;
-
-      d_phase -= phase_err*d_alpha;        // 1st order phase adjustment
-      d_freq -= phase_err*d_beta;          // 2nd order frequency adjustment
-
-      d_last_sign = sign;
-    }
-
-    if (d_phase > 1.0) {
-      if (sample < 0.0)
-       out[j++] = 1;
-      else
-       out[j++] = 0;
-      d_phase -= 1.0;
-    }
-  }
-
-  consume_each(i);
-  return j;
-}