GNU Radio Manual and C++ API Reference 3.8.5.0
The Free & Open Software Radio Ecosystem
 
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selective_fading_model.h
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1/* -*- c++ -*- */
2/*
3 * Copyright 2013 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#ifndef INCLUDED_CHANNELS_SELECTIVE_FADING_MODEL_H
24#define INCLUDED_CHANNELS_SELECTIVE_FADING_MODEL_H
25
27#include <gnuradio/sync_block.h>
28#include <gnuradio/types.h>
29
30namespace gr {
31namespace channels {
32
33const float default_delays[] = { 0.0, 0.1, 0.5 };
34const float default_mags[] = { 1.0, 0.8, 0.3 };
35
36/*!
37 * \brief fading simulator
38 * \ingroup channel_models_blk
39 *
40 * \details
41 * This block implements a basic fading model simulator that can
42 * be used to help evaluate, design, and test various signals,
43 * waveforms, and algorithms.
44 */
46{
47public:
48 // gr::channels::channel_model::sptr
49 typedef boost::shared_ptr<selective_fading_model> sptr;
50
51 /*! \brief Build the channel simulator.
52 *
53 * \param N the number of sinusoids to use in simulating the channel; 8 is a good
54 * value \param fDTs normalized maximum Doppler frequency, fD * Ts \param LOS
55 * include Line-of-Site path? selects between Rayleigh (NLOS) and Rician (LOS) models
56 * \param K Rician factor (ratio of the specular power to the scattered power)
57 * \param seed a random number to seed the noise generators
58 * \param delays a vector of values that specify the time delay of each impulse
59 * \param mags a vector of values that specify the magnitude of each impulse
60 * \param ntaps the number of filter taps
61 */
62 static sptr make(unsigned int N,
63 float fDTs,
64 bool LOS,
65 float K,
66 int seed,
67 std::vector<float> delays,
68 std::vector<float> mags,
69 int ntaps);
70
71 virtual float fDTs() = 0;
72 virtual float K() = 0;
73 virtual float step() = 0;
74
75 virtual void set_fDTs(float fDTs) = 0;
76 virtual void set_K(float K) = 0;
77 virtual void set_step(float step) = 0;
78};
79
80} /* namespace channels */
81} /* namespace gr */
82
83#endif /* INCLUDED_CHANNELS_SELECTIVE_FADING_MODEL_H */
fading simulator
Definition selective_fading_model.h:46
boost::shared_ptr< selective_fading_model > sptr
Definition selective_fading_model.h:49
virtual void set_K(float K)=0
virtual void set_step(float step)=0
static sptr make(unsigned int N, float fDTs, bool LOS, float K, int seed, std::vector< float > delays, std::vector< float > mags, int ntaps)
Build the channel simulator.
virtual void set_fDTs(float fDTs)=0
synchronous 1:1 input to output with history
Definition sync_block.h:38
#define CHANNELS_API
Definition gr-channels/include/gnuradio/channels/api.h:30
const float default_delays[]
Definition selective_fading_model.h:33
const float default_mags[]
Definition selective_fading_model.h:34
GNU Radio logging wrapper for log4cpp library (C++ port of log4j)
Definition basic_block.h:46