GNU Radio 3.5.3.2 C++ API
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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_core_api.h> 00027 #include <gr_sync_decimator.h> 00028 00029 /*! 00030 * \brief Adaptive FIR filter with gr_complex input, gr_complex output and float taps 00031 * \ingroup filter_blk 00032 */ 00033 class GR_CORE_API gr_adaptive_fir_ccf : public gr_sync_decimator 00034 { 00035 private: 00036 std::vector<float> d_new_taps; 00037 bool d_updated; 00038 00039 protected: 00040 float d_error; 00041 std::vector<float> d_taps; 00042 00043 // Override to calculate error signal per output 00044 virtual float error(const gr_complex &out) = 0; 00045 00046 // Override to calculate new weight from old, corresponding input 00047 virtual void update_tap(float &tap, const gr_complex &in) = 0; 00048 00049 gr_adaptive_fir_ccf(const char *name, int decimation, const std::vector<float> &taps); 00050 00051 public: 00052 void set_taps(const std::vector<float> &taps); 00053 00054 int work(int noutput_items, 00055 gr_vector_const_void_star &input_items, 00056 gr_vector_void_star &output_items); 00057 }; 00058 00059 #endif