GNU Radio Manual and C++ API Reference 3.8.5.0
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filterbank.h
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1/* -*- c++ -*- */
2/*
3 * Copyright 2012, 2014 Free Software Foundation, Inc.
4 *
5 * This file is part of GNU Radio
6 *
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
10 * any later version.
11 *
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
21 */
22
23
24#ifndef INCLUDED_FILTER_FILTERBANK_H
25#define INCLUDED_FILTER_FILTERBANK_H
26
27#include <gnuradio/filter/api.h>
29
30namespace gr {
31namespace filter {
32namespace kernel {
33
34/*!
35 * \brief A filter bank with generic taps.
36 *
37 * This block takes in a vector of N complex inputs, passes
38 * them through N FIR filters, and outputs a vector of N complex
39 * outputs.
40 *
41 * The only advantage of using this block over N individual
42 * FIR filter blocks is that it places less of a load on the
43 * scheduler.
44 *
45 * The number of filters cannot be changed dynamically, however
46 * filters can be deactivated (i.e. no processing is done for
47 * them) by passing a vector of filter taps containing all zeros
48 * to them. In this case their entry in the output vector is a
49 * zero.
50 *
51 */
52
54{
55protected:
56 unsigned int d_nfilts;
57 unsigned int d_ntaps;
58 std::vector<kernel::fir_filter_ccf*> d_fir_filters;
59 std::vector<std::vector<float>> d_taps;
60 std::vector<bool> d_active;
61 unsigned int d_taps_per_filter;
62
63public:
64 /*!
65 * Build the filterbank.
66 *
67 * \param taps (vector of vector of floats / list of list of floats)
68 * Populates the filters.
69 */
70 filterbank(const std::vector<std::vector<float>>& taps);
71
73
74 /*!
75 * Update the filterbank's filter taps.
76 *
77 * \param taps (vector of vector of floats / list of list of floats)
78 * The prototype filter to populate the filterbank.
79 */
80 virtual void set_taps(const std::vector<std::vector<float>>& taps);
81
82 /*!
83 * Print all of the filterbank taps to screen.
84 */
85 void print_taps();
86
87 /*!
88 * Return a vector<vector<>> of the filterbank taps
89 */
90 std::vector<std::vector<float>> taps() const;
91};
92
93} /* namespace kernel */
94} /* namespace filter */
95} /* namespace gr */
96
97#endif /* INCLUDED_FILTER_FILTERBANK_H */
A filter bank with generic taps.
Definition filterbank.h:54
filterbank(const std::vector< std::vector< float > > &taps)
std::vector< std::vector< float > > d_taps
Definition filterbank.h:59
unsigned int d_taps_per_filter
Definition filterbank.h:61
std::vector< bool > d_active
Definition filterbank.h:60
virtual void set_taps(const std::vector< std::vector< float > > &taps)
unsigned int d_ntaps
Definition filterbank.h:57
std::vector< kernel::fir_filter_ccf * > d_fir_filters
Definition filterbank.h:58
std::vector< std::vector< float > > taps() const
unsigned int d_nfilts
Definition filterbank.h:56
#define FILTER_API
Definition gr-filter/include/gnuradio/filter/api.h:30
static const float taps[NSTEPS+1][NTAPS]
Definition interpolator_taps.h:9
GNU Radio logging wrapper for log4cpp library (C++ port of log4j)
Definition basic_block.h:46