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/* -*- 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.
*/
#ifndef INCLUDED_NOAA_HRPT_SYNC_FB_H
#define INCLUDED_NOAA_HRPT_SYNC_FB_H
#include <gr_block.h>
class noaa_hrpt_sync_fb;
typedef boost::shared_ptr<noaa_hrpt_sync_fb> noaa_hrpt_sync_fb_sptr;
noaa_hrpt_sync_fb_sptr
noaa_make_hrpt_sync_fb(float alpha, float beta, float sps, float max_offset);
class noaa_hrpt_sync_fb : public gr_block
{
friend noaa_hrpt_sync_fb_sptr noaa_make_hrpt_sync_fb(float alpha, float beta, float sps, float max_offset);
noaa_hrpt_sync_fb(float alpha, float beta, float sps, float max_offset);
float d_alpha; // 1st order loop constant
float d_beta; // 2nd order loop constant
float d_sps; // samples per symbol
float d_max_offset; // Maximum frequency offset for d_sps, samples/symbol
float d_phase; // Instantaneous symbol phase
float d_freq; // Instantaneous symbol frequency, samples/symbol
int d_last_sign; // Tracks zero crossings
public:
int general_work(int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
void set_alpha(float alpha) { d_alpha = alpha; }
void set_beta(float beta) { d_beta = beta; }
void set_max_offset(float max_offset) { d_max_offset = max_offset; }
};
#endif /* INCLUDED_NOAA_HRPT_SYNC_FB_H */
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