This example is a modified version of "three-gpp-channel-example", to include the 3GPP NTN channel model. More...

#include "ns3/channel-condition-model.h"
#include "ns3/constant-position-mobility-model.h"
#include "ns3/core-module.h"
#include "ns3/geocentric-constant-position-mobility-model.h"
#include "ns3/isotropic-antenna-model.h"
#include "ns3/mobility-model.h"
#include "ns3/net-device.h"
#include "ns3/node-container.h"
#include "ns3/node.h"
#include "ns3/parabolic-antenna-model.h"
#include "ns3/simple-net-device.h"
#include "ns3/spectrum-signal-parameters.h"
#include "ns3/three-gpp-channel-model.h"
#include "ns3/three-gpp-propagation-loss-model.h"
#include "ns3/three-gpp-spectrum-propagation-loss-model.h"
#include "ns3/uniform-planar-array.h"
#include <ns3/antenna-model.h>
#include <fstream>

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Classes
struct	ComputeSnrParams
	A structure that holds the parameters for the ComputeSnr function. More...

Functions
static void	ComputeSnr (ComputeSnrParams &params)
	Compute the average SNR.

Ptr< SpectrumValue >	CreateNoisePowerSpectralDensity (double fcHz, double noiseFigureDb, double bwHz, double rbWidthHz)
	Create the noise PSD for the.

Ptr< SpectrumValue >	CreateTxPowerSpectralDensity (double fcHz, double pwrDbm, double bwHz, double rbWidthHz)
	Create the PSD for the TX.

static void	DoBeamforming (Ptr< NetDevice > thisDevice, Ptr< PhasedArrayModel > thisAntenna, Ptr< NetDevice > otherDevice)
	Perform the beamforming using the DFT beamforming method.

Variables
static Ptr< ThreeGppPropagationLossModel >	m_propagationLossModel
	the PropagationLossModel object

static Ptr< ThreeGppSpectrumPropagationLossModel >	m_spectrumLossModel
	the SpectrumPropagationLossModel object

Detailed Description

This example is a modified version of "three-gpp-channel-example", to include the 3GPP NTN channel model.

Specifically, most changes (which are also highlighted throughout the code) impact the main method, and comprise:

the configuration of ad-hoc propagation and channel condition models;
the use of GeocentricConstantPositionMobilityModel for the nodes mobility. The pre-configured parameters are the one provided by 3GPP in TR 38.821, more specifically scenario 10 in down-link mode. Two static nodes, one on the ground and one in orbit, communicate with each other. The carrier frequency is set at 20GHz with 400MHz bandwidth. The result is the SNR of the signal and the path loss, saved in the ntn-snr-trace.txt file.

Definition in file three-gpp-ntn-channel-example.cc.

Function Documentation

◆ ComputeSnr()

static void ComputeSnr ( ComputeSnrParams & params )

static

Compute the average SNR.

Parameters

params A structure that holds the parameters that are needed to perform calculations in ComputeSnr

Definition at line 258 of file three-gpp-ntn-channel-example.cc.

References ns3::PropagationLossModel::CalcRxPower(), ns3::PhasedArraySpectrumPropagationLossModel::CalcRxPowerSpectralDensity(), CreateNoisePowerSpectralDensity(), CreateTxPowerSpectralDensity(), ns3::Time::GetSeconds(), m_propagationLossModel, m_spectrumLossModel, ns3::Simulator::Now(), NS_ASSERT_MSG, NS_LOG_DEBUG, and ns3::Sum().

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◆ CreateNoisePowerSpectralDensity()

Ptr< SpectrumValue > CreateNoisePowerSpectralDensity	(	double	fcHz,
		double	noiseFigureDb,
		double	bwHz,
		double	rbWidthHz
	)

Create the noise PSD for the.

Parameters

fcHz	the carrier frequency in Hz
noiseFigureDb	the noise figure in dB
bwHz	the bandwidth in Hz
rbWidthHz	the Resource Block (RB) width in Hz

Returns: the pointer to the noise PSD

Definition at line 117 of file three-gpp-ntn-channel-example.cc.

References ns3::BandInfo::fc, ns3::BandInfo::fh, and ns3::BandInfo::fl.

Referenced by ComputeSnr().

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◆ CreateTxPowerSpectralDensity()

Ptr< SpectrumValue > CreateTxPowerSpectralDensity	(	double	fcHz,
		double	pwrDbm,
		double	bwHz,
		double	rbWidthHz
	)

Create the PSD for the TX.

Parameters

fcHz	the carrier frequency in Hz
pwrDbm	the transmission power in dBm
bwHz	the bandwidth in Hz
rbWidthHz	the Resource Block (RB) width in Hz

Returns: the pointer to the PSD

Definition at line 74 of file three-gpp-ntn-channel-example.cc.

References ns3::BandInfo::fc, ns3::BandInfo::fh, and ns3::BandInfo::fl.

Referenced by ComputeSnr().

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◆ DoBeamforming()

static void DoBeamforming	(	Ptr< NetDevice >	thisDevice,
		Ptr< PhasedArrayModel >	thisAntenna,
		Ptr< NetDevice >	otherDevice
	)

static

Perform the beamforming using the DFT beamforming method.

Parameters

thisDevice	the device performing the beamforming
thisAntenna	the antenna object associated to thisDevice
otherDevice	the device towards which point the beam

Definition at line 213 of file three-gpp-ntn-channel-example.cc.

References ns3::Angles::GetAzimuth(), and ns3::Angles::GetInclination().

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