GNU Radio 3.4.0 C++ API
|
00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2006 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_ADAPTIVE_FIR_CCF_H 00024 #define INCLUDED_GR_ADAPTIVE_FIR_CCF_H 00025 00026 #include <gr_sync_decimator.h> 00027 00028 /*! 00029 * \brief Adaptive FIR filter with gr_complex input, gr_complex output and float taps 00030 * \ingroup filter_blk 00031 */ 00032 class gr_adaptive_fir_ccf : public gr_sync_decimator 00033 { 00034 private: 00035 std::vector<float> d_new_taps; 00036 bool d_updated; 00037 00038 protected: 00039 float d_error; 00040 std::vector<float> d_taps; 00041 00042 // Override to calculate error signal per output 00043 virtual float error(const gr_complex &out) = 0; 00044 00045 // Override to calculate new weight from old, corresponding input 00046 virtual void update_tap(float &tap, const gr_complex &in) = 0; 00047 00048 gr_adaptive_fir_ccf(const char *name, int decimation, const std::vector<float> &taps); 00049 00050 public: 00051 void set_taps(const std::vector<float> &taps); 00052 00053 int work(int noutput_items, 00054 gr_vector_const_void_star &input_items, 00055 gr_vector_void_star &output_items); 00056 }; 00057 00058 #endif