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dynamic_channel_model.h
Go to the documentation of this file.
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/* -*- c++ -*- */
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/*
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* Copyright 2009,2012 Free Software Foundation, Inc.
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*
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* This file is part of GNU Radio
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*
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* GNU Radio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* GNU Radio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Radio; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef INCLUDED_CHANNELS_DYNAMIC_CHANNEL_MODEL_H
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#define INCLUDED_CHANNELS_DYNAMIC_CHANNEL_MODEL_H
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#include <
gnuradio/channels/api.h
>
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#include <
gnuradio/hier_block2.h
>
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#include <
gnuradio/types.h
>
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namespace
gr {
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namespace
channels {
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/*!
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* \brief dynamic channel simulator
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* \ingroup dynamic_channel_models_blk
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*
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* \details
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* This block implements a dynamic channel model simulator that can
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* be used to help evaluate, design, and test various signals,
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* waveforms, and algorithms.
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*
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* This model allows the user to set up an AWGN noise cource, a
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* random walk process to simulate carrier frequency drift, a random
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* walk process to simulate sample rate offset drive, and a frequency
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* selective fading channel response that is either Rayleigh or Ricean
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* for a user specified power delay profile.
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*/
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class
CHANNELS_API
dynamic_channel_model
:
virtual
public
hier_block2
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{
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public
:
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// gr::channels::dynamic_channel_model::sptr
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typedef
boost::shared_ptr<dynamic_channel_model>
sptr
;
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/*! \brief Build the dynamic channel simulator.
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*
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* \param samp_rate Input sample rate in Hz
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* \param sro_std_dev sample rate drift process standard deviation per sample in Hz
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* \param sro_max_dev maximum sample rate offset in Hz
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* \param cfo_std_dev carrier frequnecy drift process standard deviation per sample in Hz
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* \param cfo_max_dev maximum carrier frequency offset in Hz
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* \param N number of sinusoids used in frequency selective fading simulation
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* \param doppler_freq maximum doppler frequency used in fading simulation in Hz
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* \param LOS_model defines whether the fading model should include a line of site
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component. LOS->Rician, NLOS->Rayleigh
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* \param K Rician K-factor, the ratio of specular to diffuse power in the model
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* \param delays A list of fractional sample delays making up the power delay profile
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* \param mags A list of magnitudes corresponding to each delay time in the power delay profile
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* \param ntaps_mpath The length of the filter to interpolate the power delay profile over.
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Delays in the PDP must lie between 0 and ntaps_mpath, fractional delays
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will be sinc-interpolated only to the width of this filter.
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* \param noise_amp Specifies the standard deviation of the AWGN process
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* \param noise_seed A random number generator seed for the noise source.
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*/
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static
sptr
make(
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double
samp_rate,
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double
sro_std_dev,
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double
sro_max_dev,
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double
cfo_std_dev,
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double
cfo_max_dev,
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unsigned
int
N,
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double
doppler_freq,
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bool
LOS_model,
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float
K,
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std::vector<float> delays,
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std::vector<float> mags,
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int
ntaps_mpath,
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double
noise_amp,
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double
noise_seed );
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virtual
double
samp_rate()
const
= 0;
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virtual
double
sro_dev_std()
const
= 0;
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virtual
double
sro_dev_max()
const
= 0;
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virtual
double
cfo_dev_std()
const
= 0;
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virtual
double
cfo_dev_max()
const
= 0;
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virtual
double
noise_amp()
const
= 0;
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virtual
double
doppler_freq()
const
= 0;
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virtual
double
K()
const
= 0;
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virtual
void
set_samp_rate(
double
) = 0;
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virtual
void
set_sro_dev_std(
double
) = 0;
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virtual
void
set_sro_dev_max(
double
) = 0;
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virtual
void
set_cfo_dev_std(
double
) = 0;
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virtual
void
set_cfo_dev_max(
double
) = 0;
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virtual
void
set_noise_amp(
double
) = 0;
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virtual
void
set_doppler_freq(
double
) = 0;
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virtual
void
set_K(
double
) = 0;
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};
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}
/* namespace channels */
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}
/* namespace gr */
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#endif
/* INCLUDED_CHANNELS_CHANNEL_MODEL_H */
gr-channels
include
gnuradio
channels
dynamic_channel_model.h
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