three-gpp-antenna-model.cc

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2020 University of Padova, Dep. of Information Engineering, SIGNET lab.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */


#include <ns3/log.h>
#include <ns3/double.h>
#include <cmath>
#include "antenna-model.h"
#include "three-gpp-antenna-model.h"


namespace ns3 {

NS_LOG_COMPONENT_DEFINE ("ThreeGppAntennaModel");

NS_OBJECT_ENSURE_REGISTERED (ThreeGppAntennaModel);


TypeId
ThreeGppAntennaModel::GetTypeId ()
{
  static TypeId tid = TypeId ("ns3::ThreeGppAntennaModel")
    .SetParent<AntennaModel> ()
    .SetGroupName ("Antenna")
    .AddConstructor<ThreeGppAntennaModel> ()
  ;
  return tid;
}

ThreeGppAntennaModel::ThreeGppAntennaModel (void)
  : m_verticalBeamwidthDegrees {65},
    m_horizontalBeamwidthDegrees {65},
    m_aMax {30},
    m_slaV {30},
    m_geMax {8.0}
{}


ThreeGppAntennaModel::~ThreeGppAntennaModel (void)
{}


double
ThreeGppAntennaModel::GetVerticalBeamwidth () const
{
  return m_verticalBeamwidthDegrees;
}


double
ThreeGppAntennaModel::GetHorizontalBeamwidth () const
{
  return m_horizontalBeamwidthDegrees;
}


double
ThreeGppAntennaModel::GetSlaV () const
{
  return m_slaV;
}


double
ThreeGppAntennaModel::GetMaxAttenuation () const
{
  return m_aMax;
}


double
ThreeGppAntennaModel::GetAntennaElementGain () const
{
  return m_geMax;
}


double
ThreeGppAntennaModel::GetGainDb (Angles a)
{
  NS_LOG_FUNCTION (this << a);

  double phiDeg = RadiansToDegrees (a.GetAzimuth ());
  double thetaDeg = RadiansToDegrees (a.GetInclination ());

  NS_ASSERT_MSG (-180.0 <= phiDeg && phiDeg <= 180.0, "Out of boundaries: phiDeg=" << phiDeg);
  NS_ASSERT_MSG (0.0 <= thetaDeg && thetaDeg <= 180.0, "Out of boundaries: thetaDeg=" << thetaDeg);

  // compute the radiation power pattern using equations in table 7.3-1 in
  // 3GPP TR 38.901
  double vertGain = -std::min (m_slaV, 12 * pow ((thetaDeg - 90) / m_verticalBeamwidthDegrees, 2)); // vertical cut of the radiation power pattern (dB)
  double horizGain = -std::min (m_aMax, 12 * pow (phiDeg / m_horizontalBeamwidthDegrees, 2)); // horizontal cut of the radiation power pattern (dB)

  double gainDb = m_geMax - std::min (m_aMax, -(vertGain + horizGain));  // 3D radiation power pattern (dB)

  NS_LOG_DEBUG ("gain=" << gainDb << " dB");
  return gainDb;

}


}