edu.cmu.emulator.util
Class Units

java.lang.Object
  edu.cmu.emulator.util.Units

public class Units
extends Object

Units provides utility functions related to units and conversions between them. In particular, it provides coversion between linear domain and log-domain(dB) for both field and power quantities.

Version:

1.0

Author:

Eric Anderson

Field Summary

protected static double

ln10

Constructor Summary

Units()

Method Summary

static double	fromDb_field(double dB_ratio) Coverts a ratio in dB to the linear domain for field-type quantities.
static double	fromDb_pow(double dB_ratio) Coverts dB ratio to the linear domain for power-type quantities.
protected static double	log10(double lin_val)
static double	toDb_field(double lin_ratio) Coverts linear ratio to dB for field-type quantities.
static double	toDb_pow(double lin_ratio) Coverts linear ratio to dB for power-type quantities.

Methods inherited from class java.lang.Object

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

Field Detail

ln10

protected static final double ln10

Constructor Detail

Units

public Units()

Method Detail

log10

protected static double log10(double lin_val)

toDb_pow

public static double toDb_pow(double lin_ratio)

Coverts linear ratio to dB for power-type quantities. Recall that dB for a power quantity is defined as 10 Log_10 (Q_1/Q_0)

Parameters:

lin_ratio - Ratio in linear domain

Returns:

Ratio in dB

fromDb_pow

public static double fromDb_pow(double dB_ratio)

Coverts dB ratio to the linear domain for power-type quantities. Recall that dB for a power quantity is defined as 10 Log_10 (Q_1/Q_0)

Parameters:

dB_ratio - Ratio in dB

Returns:

Linear ratio

toDb_field

public static double toDb_field(double lin_ratio)

Coverts linear ratio to dB for field-type quantities. Recall that dB for a field quantity is defined as 10 Log_10 (Q_1^2/Q_0^2) = 20 Log_10 (Q_1 / Q_0)

Parameters:

lin_ratio - Ratio in linear domain

Returns:

Ratio in dB

fromDb_field

public static double fromDb_field(double dB_ratio)

Coverts a ratio in dB to the linear domain for field-type quantities. Recall that dB for a field quantity is defined as 10 Log_10 (Q_1^2/Q_0^2) = 20 Log_10 (Q_1 / Q_0)

Parameters:

dB_ratio - Ratio in linear domain

Returns:

Ratio in dB