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/* -*- c++ -*- */
/*
* Copyright 2013 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifndef INCLUDED_CHANNELS_SELECTIVE_FADING_MODEL_H
#define INCLUDED_CHANNELS_SELECTIVE_FADING_MODEL_H
#include <gnuradio/channels/api.h>
#include <gnuradio/sync_block.h>
#include <gnuradio/types.h>
namespace gr {
namespace channels {
constexpr float default_delays[] = { 0.0, 0.1, 0.5 };
constexpr float default_mags[] = { 1.0, 0.8, 0.3 };
/*!
* \brief fading simulator
* \ingroup channel_models_blk
*
* \details
* This block implements a basic fading model simulator that can
* be used to help evaluate, design, and test various signals,
* waveforms, and algorithms.
*/
class CHANNELS_API selective_fading_model : virtual public sync_block
{
public:
// gr::channels::channel_model::sptr
typedef boost::shared_ptr<selective_fading_model> sptr;
/*! \brief Build the channel simulator.
*
* \param N the number of sinusoids to use in simulating the channel; 8 is a good
* value \param fDTs normalized maximum Doppler frequency, fD * Ts \param LOS
* include Line-of-Site path? selects between Rayleigh (NLOS) and Rician (LOS) models
* \param K Rician factor (ratio of the specular power to the scattered power)
* \param seed a random number to seed the noise generators
* \param delays a vector of values that specify the time delay of each impulse
* \param mags a vector of values that specify the magnitude of each impulse
* \param ntaps the number of filter taps
*/
static sptr make(unsigned int N,
float fDTs,
bool LOS,
float K,
int seed,
std::vector<float> delays,
std::vector<float> mags,
int ntaps);
virtual float fDTs() = 0;
virtual float K() = 0;
virtual float step() = 0;
virtual void set_fDTs(float fDTs) = 0;
virtual void set_K(float K) = 0;
virtual void set_step(float step) = 0;
};
} /* namespace channels */
} /* namespace gr */
#endif /* INCLUDED_CHANNELS_SELECTIVE_FADING_MODEL_H */
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