gr_fmdet_cf.h

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00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2008 Free Software Foundation, Inc.
00004  * 
00005  * This file is part of GNU Radio
00006  * 
00007  * GNU Radio is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 3, or (at your option)
00010  * any later version.
00011  * 
00012  * GNU Radio is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  * 
00017  * You should have received a copy of the GNU General Public License
00018  * along with GNU Radio; see the file COPYING.  If not, write to
00019  * the Free Software Foundation, Inc., 51 Franklin Street,
00020  * Boston, MA 02110-1301, USA.
00021  */
00022 
00023 #ifndef INCLUDED_GR_FMDET_CF_H
00024 #define INCLUDED_GR_FMDET_CF_H
00025 
00026 #include <gr_sync_block.h>
00027 
00028 class gr_fmdet_cf;
00029 typedef boost::shared_ptr<gr_fmdet_cf> gr_fmdet_cf_sptr;
00030 
00031 gr_fmdet_cf_sptr gr_make_fmdet_cf (float samplerate, float freq_low, float freq_high, float scl);
00032 
00033 /*!
00034  * \brief Implements an IQ slope detector
00035  * 
00036  *
00037  * input: stream of complex; output: stream of floats
00038  *
00039  * This implements a limiting slope detector.  The limiter is in the
00040  * normalization by the magnitude of the sample 
00041  */
00042 
00043 class gr_fmdet_cf : public gr_sync_block
00044 {
00045   friend gr_fmdet_cf_sptr gr_make_fmdet_cf (float samplerate, float freq_low,
00046                                             float freq_high, float scl);
00047 
00048   gr_complex d_S1,d_S2,d_S3,d_S4;
00049   float d_freq,d_freqlo,d_freqhi,d_scl,d_bias;
00050   gr_fmdet_cf (float samplerate, float freq_low, float freq_high, float scl);
00051 
00052   int work (int noutput_items,
00053             gr_vector_const_void_star &input_items,
00054             gr_vector_void_star &output_items);
00055 
00056 };
00057 
00058 #endif

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