agi.foundation.radar

(agi.foundation.radar-2024r3.jar)

Class SignalToNoiseRatioScalar

java.lang.Object

agi.foundation.infrastructure.DefinitionalObject

agi.foundation.geometry.Scalar

agi.foundation.radar.SingleTargetRadarLinkScalar

agi.foundation.radar.SignalToNoiseRatioScalar

All Implemented Interfaces:

ICloneWithContext, IEnumerateDependencies, IEquatableDefinition, IFreezable

public class SignalToNoiseRatioScalar
extends SingleTargetRadarLinkScalar

A SingleTargetRadarLinkScalar which represents the signal-to-noise (unitless ratio), either single pulse or integrated and with or without interference effects, at the output of the radar receiver.

Constructor Summary

Constructors

Constructor and Description
SignalToNoiseRatioScalar(IServiceProvider radarTransmitter, IServiceProvider target, IServiceProvider radarReceiver, IntendedSignalStrategy intendedSignalStrategy, SignalPropagationGraph graph) Initializes a new instance.
SignalToNoiseRatioScalar(IServiceProvider radarTransmitter, IServiceProvider target, IServiceProvider radarReceiver, IntendedSignalStrategy intendedSignalStrategy, SignalPropagationGraph graph, boolean evaluateInterference) Initializes a new instance.
SignalToNoiseRatioScalar(IServiceProvider radarTransmitter, IServiceProvider target, IServiceProvider radarReceiver, IntendedSignalStrategy intendedSignalStrategy, SignalPropagationGraph graph, boolean evaluateInterference, SignalToNoiseRatioComputeMode computeMode) Initializes a new instance.
SignalToNoiseRatioScalar(IServiceProvider radarTransmitter, IServiceProvider target, IServiceProvider radarReceiver, IntendedSignalStrategy intendedSignalStrategy, SignalPropagationGraph graph, SignalToNoiseRatioComputeMode computeMode) Initializes a new instance.
SignalToNoiseRatioScalar(IServiceProvider radarTransmitter, IServiceProvider target, IServiceProvider radarReceiver, RadarWaveformProcessor waveformProcessor, IntendedSignalStrategy intendedSignalStrategy, SignalPropagationGraph graph, boolean evaluateInterference, SignalToNoiseRatioComputeMode computeMode) Initializes a new instance.
SignalToNoiseRatioScalar(IServiceProvider radarTransmitter, IServiceProvider target, IServiceProvider radarReceiver, RadarWaveformProcessor waveformProcessor, IntendedSignalStrategy intendedSignalStrategy, SignalPropagationGraph graph, SignalToNoiseRatioComputeMode computeMode) Initializes a new instance.
SignalToNoiseRatioScalar(SignalToNoiseRatioScalar existingInstance, CopyContext context) Initializes a new instance as a copy of an existing instance.

Method Summary

Modifier and Type	Method and Description
protected boolean	checkForSameDefinition(SignalToNoiseRatioScalar other) Checks to determine if another instance has the same definition as this instance and returns true if it does.
protected boolean	checkForSameDefinition(SingleTargetRadarLinkScalar other) Checks to determine if another instance has the same definition as this instance and returns true if it does.
Object	clone(CopyContext context) Clones this object using the specified context.
protected int	computeCurrentDefinitionHashCode() Computes a hash code based on the current properties of this object.
void	enumerateDependencies(DependencyEnumerator enumerator) Enumerates the dependencies of this object by calling DependencyEnumerator#enumerate(T) for each object that this object directly depends upon.
SignalToNoiseRatioComputeMode	getComputeMode() Gets the signal-to-noise ratio compute mode.
ScalarEvaluator	getEvaluator(EvaluatorGroup group) Gets an evaluator which computes the signal-to-noise, as a unitless ratio, at the output of the radar receiver.
RadarWaveformProcessor	getWaveformProcessor() Gets the waveform processor used to compute the signal-to-noise ratio.
void	setComputeMode(SignalToNoiseRatioComputeMode value) Sets the signal-to-noise ratio compute mode.
void	setWaveformProcessor(RadarWaveformProcessor value) Sets the waveform processor used to compute the signal-to-noise ratio.

Methods inherited from class agi.foundation.radar.SingleTargetRadarLinkScalar

checkForSameDefinition, freezeAggregatedObjects, getEvaluateInterference, getIntendedSignalStrategy, getRadarReceiver, getRadarTransmitter, getSignalPropagationGraph, getTarget, getUseLogarithmicSampling, setUseLogarithmicSampling, validateProperties

Methods inherited from class agi.foundation.geometry.Scalar

add, add, add, add, add, checkForSameDefinition, createScalarDerivative, divide, divide, divide, divide, divide, getEvaluator, multiply, multiply, multiply, multiply, multiply, power, subtract, subtract, subtract, subtract, subtract, toScalar

Methods inherited from class agi.foundation.infrastructure.DefinitionalObject

areSameDefinition, areSameDefinition, areSameDefinition, areSameDefinition, areSameDefinition, collectionItemsAreSameDefinition, collectionItemsAreSameDefinition, collectionItemsAreSameDefinition, dictionaryItemsAreSameDefinition, freeze, getCollectionHashCode, getCollectionHashCode, getCollectionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDictionaryHashCode, getIsFrozen, isSameDefinition, throwIfFrozen

Methods inherited from class java.lang.Object

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

Constructor Detail

SignalToNoiseRatioScalar

public SignalToNoiseRatioScalar(IServiceProvider radarTransmitter,
                                IServiceProvider target,
                                IServiceProvider radarReceiver,
                                IntendedSignalStrategy intendedSignalStrategy,
                                SignalPropagationGraph graph)

Initializes a new instance.

• The ComputeMode (get / set) property defaults to the value SignalToNoiseRatioComputeMode.SINGLE_PULSE.
• The EvaluateInterference (get) property is defaulted to false.

Parameters:

radarTransmitter - An IServiceProvider which represents the radar transmitter.

target - An IServiceProvider which represents the radar target. A valid target instance must provide the IPointScattererService service.

radarReceiver - An IServiceProvider which represents the radar receiver.

graph - The graph of communication and radar links used to propagate signals.

intendedSignalStrategy - The method used to identify the desired signal for scalar evaluation.

SignalToNoiseRatioScalar

public SignalToNoiseRatioScalar(IServiceProvider radarTransmitter,
                                IServiceProvider target,
                                IServiceProvider radarReceiver,
                                IntendedSignalStrategy intendedSignalStrategy,
                                SignalPropagationGraph graph,
                                boolean evaluateInterference)

Initializes a new instance.

• The ComputeMode (get / set) property defaults to the value SignalToNoiseRatioComputeMode.SINGLE_PULSE.

Parameters:

radarTransmitter - An IServiceProvider which represents the radar transmitter.

target - An IServiceProvider which represents the radar target. A valid target instance must provide the IPointScattererService service.

radarReceiver - An IServiceProvider which represents the radar receiver.

graph - The graph of communication and radar links used to propagate signals.

intendedSignalStrategy - The method used to identify the desired signal for scalar evaluation.

evaluateInterference - Indicates whether or not the scalar should account for interference sources in the scalar evaluation. If false, no interference will be evaluated, even if present in the SignalPropagationGraph (get).

SignalToNoiseRatioScalar

public SignalToNoiseRatioScalar(IServiceProvider radarTransmitter,
                                IServiceProvider target,
                                IServiceProvider radarReceiver,
                                IntendedSignalStrategy intendedSignalStrategy,
                                SignalPropagationGraph graph,
                                @Nonnull
                                SignalToNoiseRatioComputeMode computeMode)

Initializes a new instance.

The EvaluateInterference (get) property is defaulted to false.

Parameters:

radarTransmitter - An IServiceProvider which represents the radar transmitter.

target - An IServiceProvider which represents the radar target. A valid target instance must provide the IPointScattererService service.

radarReceiver - An IServiceProvider which represents the radar receiver.

graph - The graph of communication and radar links used to propagate signals.

intendedSignalStrategy - The method used to identify the desired signal for scalar evaluation.

computeMode - Mode for computing the signal-to-noise ratio.

SignalToNoiseRatioScalar

public SignalToNoiseRatioScalar(IServiceProvider radarTransmitter,
                                IServiceProvider target,
                                IServiceProvider radarReceiver,
                                RadarWaveformProcessor waveformProcessor,
                                IntendedSignalStrategy intendedSignalStrategy,
                                SignalPropagationGraph graph,
                                @Nonnull
                                SignalToNoiseRatioComputeMode computeMode)

Initializes a new instance.

The EvaluateInterference (get) property is defaulted to false.

Parameters:

radarTransmitter - An IServiceProvider which represents the radar transmitter.

target - An IServiceProvider which represents the radar target. A valid target instance must provide the IPointScattererService service.

radarReceiver - An IServiceProvider which represents the radar receiver.

waveformProcessor - The waveform processor used to compute the signal-to-noise ratio.

graph - The graph of communication and radar links used to propagate signals.

intendedSignalStrategy - The method used to identify the desired signal for scalar evaluation.

computeMode - Mode for computing the signal-to-noise ratio.

SignalToNoiseRatioScalar

public SignalToNoiseRatioScalar(IServiceProvider radarTransmitter,
                                IServiceProvider target,
                                IServiceProvider radarReceiver,
                                IntendedSignalStrategy intendedSignalStrategy,
                                SignalPropagationGraph graph,
                                boolean evaluateInterference,
                                @Nonnull
                                SignalToNoiseRatioComputeMode computeMode)

Initializes a new instance.

Parameters:

radarTransmitter - An IServiceProvider which represents the radar transmitter.

target - An IServiceProvider which represents the radar target. A valid target instance must provide the IPointScattererService service.

radarReceiver - An IServiceProvider which represents the radar receiver.

graph - The graph of communication and radar links used to propagate signals.

intendedSignalStrategy - The method used to identify the desired signal for scalar evaluation.

evaluateInterference - Indicates whether or not the scalar should account for interference sources in the scalar evaluation. If false, no interference will be evaluated, even if present in the SignalPropagationGraph (get).

computeMode - Mode for computing the signal-to-noise ratio.

SignalToNoiseRatioScalar

public SignalToNoiseRatioScalar(IServiceProvider radarTransmitter,
                                IServiceProvider target,
                                IServiceProvider radarReceiver,
                                RadarWaveformProcessor waveformProcessor,
                                IntendedSignalStrategy intendedSignalStrategy,
                                SignalPropagationGraph graph,
                                boolean evaluateInterference,
                                @Nonnull
                                SignalToNoiseRatioComputeMode computeMode)

Initializes a new instance.

Parameters:

radarTransmitter - An IServiceProvider which represents the radar transmitter.

target - An IServiceProvider which represents the radar target. A valid target instance must provide the IPointScattererService service.

radarReceiver - An IServiceProvider which represents the radar receiver.

waveformProcessor - The waveform processor used to compute the signal-to-noise ratio.

graph - The graph of communication and radar links used to propagate signals.

intendedSignalStrategy - The method used to identify the desired signal for scalar evaluation.

evaluateInterference - Indicates whether or not the scalar should account for interference sources in the scalar evaluation. If false, no interference will be evaluated, even if present in the SignalPropagationGraph (get).

computeMode - Mode for computing the signal-to-noise ratio.

SignalToNoiseRatioScalar

public SignalToNoiseRatioScalar(@Nonnull
                                SignalToNoiseRatioScalar existingInstance,
                                @Nonnull
                                CopyContext context)

Initializes a new instance as a copy of an existing instance.

See ICloneWithContext.clone(CopyContext) for more information about how to implement this constructor in a derived class.

Parameters:

existingInstance - The existing instance to copy.

context - A CopyContext that controls the depth of the copy.

Throws:

ArgumentNullException - Thrown when existingInstance or context is null.

Method Detail

clone

public Object clone(CopyContext context)

Clones this object using the specified context.

This method should be implemented to call a copy constructor on the class of the object being cloned. The copy constructor should take the CopyContext as a parameter in addition to the existing instance to copy. The copy constructor should first call CopyContext.addObjectMapping(T, T) to identify the newly constructed instance as a copy of the existing instance. It should then copy all fields, using CopyContext.updateReference(T) to copy any reference fields.

A typical implementation of ICloneWithContext:

public static class MyClass implements ICloneWithContext {
    public MyClass(MyClass existingInstance, CopyContext context) {
        context.addObjectMapping(existingInstance, this);
        someReference = context.updateReference(existingInstance.someReference);
    }

    @Override
    public final Object clone(CopyContext context) {
        return new MyClass(this, context);
    }

    private Object someReference;
}

In general, all fields that are reference types should be copied with a call to CopyContext.updateReference(T). There are a couple of exceptions:

1. Fields that are aggregate parts of the object should always be copied. A referenced object is an aggregate if properties or methods on the object being copied can modify the externally-visible value of the referenced object.
2. If the semantics of the referenced object require that it have a single parent, owner, context, etc., and the object being copied is that parent, owner, or context, then the referenced object should always be copied.

If one of these exceptions applies, the CopyContext should be given an opportunity to update the reference before the reference is copied explicitly. Use CopyContext.updateReference(T) to update the reference. If CopyContext.updateReference(T) returns the original object, indicating that the context does not have a replacement registered, then copy the object manually by invoking a Clone method, a copy constructor, or by manually constructing a new instance and copying the values.

alwaysCopy = context.updateReference(existingInstance.alwaysCopy);
if (existingInstance.alwaysCopy != null && alwaysCopy == existingInstance.alwaysCopy) {
    alwaysCopy = (AlwaysCopy) existingInstance.alwaysCopy.clone(context);
}

If you are implementing an evaluator (a class that implements IEvaluator), the IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) method shares some responsibilities with the copy context constructor. Code duplication can be avoided by doing the following:

1. For references to other evaluators ONLY, simply assign the reference in the constructor instead of calling CopyContext.updateReference(T). You should still call CopyContext.updateReference(T) on any references to non-evaluators.
2. Call IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) as the last line in the constructor and pass it the same CopyContext passed to the constructor.
3. Implement IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) as normal. See the reference documentation for IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) for more information on implementing that method.

public MyClass(MyClass existingInstance, CopyContext context) {
    super(existingInstance, context);
    someReference = context.updateReference(existingInstance.someReference);
    evaluatorReference = existingInstance.evaluatorReference;
    updateEvaluatorReferences(context);
}

@Override
public void updateEvaluatorReferences(CopyContext context) {
    evaluatorReference = context.updateReference(evaluatorReference);
}

@Override
public Object clone(CopyContext context) {
    return new MyClass(this, context);
}

private Object someReference;
private IEvaluator evaluatorReference;

Specified by:

clone in interface ICloneWithContext

Specified by:

clone in class DefinitionalObject

Parameters:

context - The context to use to perform the copy.

Returns:

A new instance which is a copy of this object.

checkForSameDefinition

protected final boolean checkForSameDefinition(SingleTargetRadarLinkScalar other)

Checks to determine if another instance has the same definition as this instance and returns true if it does. Derived classes MUST override this method and check all new fields introduced by the derived class for definitional equivalence. It is NOT necessary to check base class fields because the base class will already have done that. When overriding this method, you should NOT call the base implementation because it will return false for all derived-class instances. Derived classes should check the type of other to preserve the symmetric nature of IEquatableDefinition.isSameDefinition(java.lang.Object).

Specified by:

checkForSameDefinition in class SingleTargetRadarLinkScalar

Parameters:

other - The other instance to compare to this one.

Returns:

true if the two objects are defined equivalently; otherwise false.

checkForSameDefinition

protected boolean checkForSameDefinition(SignalToNoiseRatioScalar other)

Checks to determine if another instance has the same definition as this instance and returns true if it does. Derived classes MUST override this method and check all new fields introduced by the derived class for definitional equivalence. It is NOT necessary to check base class fields because the base class will already have done that. When overriding this method, you should NOT call the base implementation because it will return false for all derived-class instances. Derived classes should check the type of other to preserve the symmetric nature of IEquatableDefinition.isSameDefinition(java.lang.Object).

Parameters:

other - The other instance to compare to this one.

Returns:

true if the two objects are defined equivalently; otherwise false.

computeCurrentDefinitionHashCode

protected int computeCurrentDefinitionHashCode()

Computes a hash code based on the current properties of this object. Derived classes MUST override this method and compute a hash code that combines: a unique hash code seed, the base implementation result, and the hash codes of all new fields introduced by the derived class which are used in the SignalToNoiseRatioScalar.checkForSameDefinition(agi.foundation.radar.SingleTargetRadarLinkScalar) method.

Overrides:

computeCurrentDefinitionHashCode in class SingleTargetRadarLinkScalar

Returns:

The computed hash code.

enumerateDependencies

public void enumerateDependencies(DependencyEnumerator enumerator)

Enumerates the dependencies of this object by calling DependencyEnumerator#enumerate(T) for each object that this object directly depends upon. Derived classes which contain additional dependencies MUST override this method, call the base implementation, and enumerate dependencies introduced by the derived class.

Specified by:

enumerateDependencies in interface IEnumerateDependencies

Overrides:

enumerateDependencies in class SingleTargetRadarLinkScalar

Parameters:

enumerator - The enumerator that is informed of the dependencies of this object.

getComputeMode

@Nonnull
public final SignalToNoiseRatioComputeMode getComputeMode()

Gets the signal-to-noise ratio compute mode.

setComputeMode

public final void setComputeMode(@Nonnull
                                 SignalToNoiseRatioComputeMode value)

Sets the signal-to-noise ratio compute mode.

getWaveformProcessor

public final RadarWaveformProcessor getWaveformProcessor()

Gets the waveform processor used to compute the signal-to-noise ratio.

setWaveformProcessor

public final void setWaveformProcessor(RadarWaveformProcessor value)

Sets the waveform processor used to compute the signal-to-noise ratio.

getEvaluator

public ScalarEvaluator getEvaluator(EvaluatorGroup group)

Gets an evaluator which computes the signal-to-noise, as a unitless ratio, at the output of the radar receiver. Depending on how the scalar is configured, the evaluator can provide the single pulse sign-to-noise ratio as well as take into account interference effects.

The ScalarEvaluator returned from this method assumes that the evaluation time is equivalent to the time of signal transmission.

Specified by:

getEvaluator in class Scalar

Parameters:

group - The evaluator group in which to create evaluators.

Returns:

An evaluator which computes the signal-to-noise, as a unitless ratio, at the output of the radar receiver. Depending on how the scalar is configured, the evaluator can provide the single pulse sign-to-noise ratio as well as take into account interference effects.

Throws:

PropertyInvalidException - Thrown if any of the properties are null.

IllegalStateException - Thrown if the RadarTransmitter (get), Target (get), and RadarReceiver (get) instances do not form a valid link path in the SignalPropagationGraph (get) instance.

ServiceNotAvailableException - Thrown if the RadarReceiver (get) does not provide the IProcessedRadarWaveformOutputService. The IProcessedRadarWaveformOutputService will be missing if the ProcessedRadarWaveformOutputExtension was not added to the radar receiver Platform instance.

IllegalStateException - Thrown if the WaveformProcessor (get / set) is null and the ProcessedRadarWaveformOutput property of the IProcessedRadarWaveformOutputService service interface returns null. This can happen if the ProcessedRadarWaveformOutputExtension of the radar receiver was configured with a null RadarWaveformProcessor.

ArgumentNullException - Thrown if the group argument is null.