GNU Radio 2.x: gr_clock_recovery_mm_ff.h Source File

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# gr_clock_recovery_mm_ff.h

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    00001 /* -*- c++ -*- */
    00002 /*
    00003  * Copyright 2004 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 2, 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., 59 Temple Place - Suite 330,
    00020  * Boston, MA 02111-1307, USA.
    00021  */
    00022
    00023 #ifndef INCLUDED_GR_CLOCK_RECOVERY_MM_FF_H
    00024 #define INCLUDED_GR_CLOCK_RECOVERY_MM_FF_H
    00025
    00026 #include <gr_block.h>
    00027 #include <stdio.h>
    00028
    00029 class gri_mmse_fir_interpolator;
    00030
    00031 class gr_clock_recovery_mm_ff;
    00032 typedef boost::shared_ptr<gr_clock_recovery_mm_ff> gr_clock_recovery_mm_ff_sptr;
    00033
    00034 // public constructor
    00035 gr_clock_recovery_mm_ff_sptr
    00036 gr_make_clock_recovery_mm_ff (float omega, float gain_omega, float mu, float gain_mu,
    00037                               float omega_relative_limit=0.001);
    00038
    00049 class gr_clock_recovery_mm_ff : public gr_block
    00050 {
    00051  public:
    00052   ~gr_clock_recovery_mm_ff ();
    00053   void forecast(int noutput_items, gr_vector_int &ninput_items_required);
    00054   int general_work (int noutput_items,
    00055                     gr_vector_int &ninput_items,
    00056                     gr_vector_const_void_star &input_items,
    00057                     gr_vector_void_star &output_items);
    00058   float mu() const { return d_mu;}
    00059   float omega() const { return d_omega;}
    00060   float gain_mu() const { return d_gain_mu;}
    00061   float gain_omega() const { return d_gain_omega;}
    00062
    00063   void set_gain_mu (float gain_mu) { d_gain_mu = gain_mu; }
    00064   void set_gain_omega (float gain_omega) { d_gain_omega = gain_omega; }
    00065   void set_mu (float mu) { d_mu = mu; }
    00066   void set_omega (float omega){
    00067     d_omega = omega;
    00068     d_min_omega = omega*(1.0 - d_omega_relative_limit);
    00069     d_max_omega = omega*(1.0 + d_omega_relative_limit);
    00070   }
    00071
    00072 protected:
    00073   gr_clock_recovery_mm_ff (float omega, float gain_omega, float mu, float gain_mu,
    00074                            float omega_relative_limit);
    00075
    00076  private:
    00077   float                         d_mu;           // fractional sample position [0.0, 1.0]
    00078   float                         d_omega;        // nominal frequency
    00079   float                         d_min_omega;    // minimum allowed omega
    00080   float                         d_max_omega;    // maximum allowed omega
    00081   float                         d_gain_omega;   // gain for adjusting omega
    00082   float                         d_gain_mu;      // gain for adjusting mu
    00083   float                         d_last_sample;
    00084   gri_mmse_fir_interpolator     *d_interp;
    00085   FILE                          *d_logfile;
    00086   float                         d_omega_relative_limit; // used to compute min and max omega
    00087
    00088   friend gr_clock_recovery_mm_ff_sptr
    00089   gr_make_clock_recovery_mm_ff (float omega, float gain_omega, float mu, float gain_mu,
    00090                                 float omega_relative_limit);
    00091 };
    00092
    00093 #endif