NS-3
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a Two-Ray Ground propagation loss model ported from NS2 More...
#include <propagation-loss-model.h>
Public Member Functions | |
void | SetLambda (double frequency, double speed) |
void | SetLambda (double lambda) |
void | SetSystemLoss (double systemLoss) |
void | SetMinDistance (double minDistance) |
double | GetMinDistance (void) const |
double | GetLambda (void) const |
double | GetSystemLoss (void) const |
void | SetHeightAboveZ (double heightAboveZ) |
Static Public Member Functions | |
static TypeId | GetTypeId (void) |
This method returns the TypeId associated to ns3::TwoRayGroundPropagationLossModel. |
a Two-Ray Ground propagation loss model ported from NS2
Two-ray ground reflection model.
The original equation in Rappaport's book assumes L = 1. To be consistent with the free space equation, L is added here.
Ht and Hr are set at the respective nodes z coordinate plus a model parameter set via SetHeightAboveZ.
The two-ray model does not give a good result for short distances, due to the oscillation caused by constructive and destructive combination of the two rays. Instead the Friis free-space model is used for small distances.
The crossover distance, below which Friis is used, is calculated as follows:
double ns3::TwoRayGroundPropagationLossModel::GetLambda | ( | void | ) | const |
double ns3::TwoRayGroundPropagationLossModel::GetMinDistance | ( | void | ) | const |
double ns3::TwoRayGroundPropagationLossModel::GetSystemLoss | ( | void | ) | const |
static TypeId ns3::TwoRayGroundPropagationLossModel::GetTypeId | ( | void | ) | [static] |
This method returns the TypeId associated to ns3::TwoRayGroundPropagationLossModel.
This object is accessible through the following paths with Config::Set and Config::Connect:
Attributes defined for this type:
No TraceSources defined for this type.
Reimplemented from ns3::PropagationLossModel.
void ns3::TwoRayGroundPropagationLossModel::SetHeightAboveZ | ( | double | heightAboveZ | ) |
heightAboveZ | the model antenna height above the node's Z coordinate |
Set the model antenna height above the node's Z coordinate
void ns3::TwoRayGroundPropagationLossModel::SetLambda | ( | double | lambda | ) |
lambda | (m) the wavelength |
Set the main wavelength used in the TwoRayGround model calculation.
void ns3::TwoRayGroundPropagationLossModel::SetLambda | ( | double | frequency, |
double | speed | ||
) |
frequency | (Hz) |
speed | (m/s) |
Set the main wavelength used in the TwoRayGround model calculation.
void ns3::TwoRayGroundPropagationLossModel::SetMinDistance | ( | double | minDistance | ) |
minDistance | the minimum distance |
Below this distance, the txpower is returned unmodified as the rxpower.
void ns3::TwoRayGroundPropagationLossModel::SetSystemLoss | ( | double | systemLoss | ) |
systemLoss | (dimension-less) |
Set the system loss used by the TwoRayGround propagation model.