edu.cmu.emulator.signal
Class LogDistanceLossModel

java.lang.Object
  edu.cmu.emulator.signal.LogDistanceLossModel

All Implemented Interfaces:

LossModel

public class LogDistanceLossModel
extends Object
implements LossModel

Implements the Log based channel model (Path loss model). Performs the calculations of Large scale path loss by using the parameter values specified.

Field Summary

protected double	inv_d0
protected double	n10
private static double	NAT_LOG_10
protected double	pld0
static String	TYPE

Constructor Summary

LogDistanceLossModel()

LogDistanceLossModel(double d0, double pld0, double n)
Constructor.

Method Summary

private int	findDoors(double[] locationA, double[] locationB)
private int	findDoors(int roomIDA, int roomIDB)
private int	findRoomID(double[] location)
private int	findWalls(double[] locationA, double[] locationB)
private int	findWalls(int roomIDA, int roomIDB)
private double	getAddLoss(Antenna a1, Antenna a2)
double	getLoss(Antenna a1, Antenna a2, long timeMillis)
String	getType()
void	init(double d0, double pld0, double n)
private double	log10(double x)
void	parseSubClass(Element lossModelDef)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

inv_d0

protected double inv_d0

pld0

protected double pld0

n10

protected double n10

NAT_LOG_10

private static final double NAT_LOG_10

TYPE

public static final String TYPE

See Also:

Constant Field Values

Constructor Detail

LogDistanceLossModel

public LogDistanceLossModel()

LogDistanceLossModel

public LogDistanceLossModel(double d0,
                            double pld0,
                            double n)

Constructor.

Parameters:

d0 - The close-in reference distance.

pld0 - Path loss at distance d0.

n - The Path Loss Exponent - indicates the rate at which the path loss increases with distance.

Method Detail

getType

public String getType()

Specified by:

getType in interface LossModel

init

public void init(double d0,
                 double pld0,
                 double n)

Parameters:

d0 - The close-in reference distance.

pld0 - Path loss at distance d0.

n - The Path Loss Exponent - indicates the rate at which the path loss increases with distance.

parseSubClass

public void parseSubClass(Element lossModelDef)

Specified by:

parseSubClass in interface LossModel

getLoss

public double getLoss(Antenna a1,
                      Antenna a2,
                      long timeMillis)

Specified by:

getLoss in interface LossModel

getAddLoss

private double getAddLoss(Antenna a1,
                          Antenna a2)

findRoomID

private int findRoomID(double[] location)

findDoors

private int findDoors(int roomIDA,
                      int roomIDB)

findWalls

private int findWalls(int roomIDA,
                      int roomIDB)

findDoors

private int findDoors(double[] locationA,
                      double[] locationB)

findWalls

private int findWalls(double[] locationA,
                      double[] locationB)

log10

private final double log10(double x)