MitchellWalkerProbabilityOfDetectionScalar Class

A SingleTargetRadarLinkScalar which represents the Mitchell-Walker probability of detection model. The probability of detection (PDet) is a function of the signal-to-noise ratio (single pulse or integrated, with or without interference effects), the number of pulses integrated, the probability of false alarm, and the radar cross section (RCS) fluctuation type (SwerlingTargetModel). If enabled, the probability of detection for a constant false alarm rate (CFAR) can be evaluated based on the number of reference cells. A CFAR receiver will adjust the detection threshold based on the noise in reference 'cells' around the cell being examined for the presence of a target.

Inheritance Hierarchy

SystemObject
  AGI.Foundation.InfrastructureDefinitionalObject
    AGI.Foundation.GeometryScalar
      AGI.Foundation.RadarSingleTargetRadarLinkScalar
        AGI.Foundation.RadarMitchellWalkerProbabilityOfDetectionScalar

Namespace: AGI.Foundation.Radar
Assembly: AGI.Foundation.Radar (in AGI.Foundation.Radar.dll) Version: 24.3.420.0 (24.3.420.0)

Syntax

C++

Copy

public class MitchellWalkerProbabilityOfDetectionScalar : SingleTargetRadarLinkScalar

Public Class MitchellWalkerProbabilityOfDetectionScalar
	Inherits SingleTargetRadarLinkScalar

public ref class MitchellWalkerProbabilityOfDetectionScalar : public SingleTargetRadarLinkScalar

type MitchellWalkerProbabilityOfDetectionScalar =  
    class
        inherit SingleTargetRadarLinkScalar
    end

The MitchellWalkerProbabilityOfDetectionScalar type exposes the following members.

Constructors

	Name	Description
	MitchellWalkerProbabilityOfDetectionScalar(MitchellWalkerProbabilityOfDetectionScalar, CopyContext)	Initializes a new instance as a copy of an existing instance.
	MitchellWalkerProbabilityOfDetectionScalar(IServiceProvider, IServiceProvider, IServiceProvider, IntendedSignalStrategy, SignalPropagationGraph)	Initializes a new instance.
	MitchellWalkerProbabilityOfDetectionScalar(IServiceProvider, IServiceProvider, IServiceProvider, IntendedSignalStrategy, SignalPropagationGraph, SignalToNoiseRatioComputeMode)	Initializes a new instance.
	MitchellWalkerProbabilityOfDetectionScalar(IServiceProvider, IServiceProvider, IServiceProvider, IntendedSignalStrategy, SignalPropagationGraph, Boolean)	Initializes a new instance.
	MitchellWalkerProbabilityOfDetectionScalar(IServiceProvider, IServiceProvider, IServiceProvider, IntendedSignalStrategy, SignalPropagationGraph, Boolean, SignalToNoiseRatioComputeMode)	Initializes a new instance.
	MitchellWalkerProbabilityOfDetectionScalar(IServiceProvider, IServiceProvider, IServiceProvider, IntendedSignalStrategy, SignalPropagationGraph, Double, SignalToNoiseRatioComputeMode)	Initializes a new instance.
	MitchellWalkerProbabilityOfDetectionScalar(IServiceProvider, IServiceProvider, IServiceProvider, IntendedSignalStrategy, SignalPropagationGraph, Boolean, Double, SignalToNoiseRatioComputeMode)	Initializes a new instance.
	MitchellWalkerProbabilityOfDetectionScalar(IServiceProvider, IServiceProvider, IServiceProvider, IntendedSignalStrategy, SignalPropagationGraph, Boolean, Double, Boolean, Int32, SignalToNoiseRatioComputeMode)	Initializes a new instance.

Top

Properties

	Name	Description
	ComputeMode	Gets or sets the mode used for computing the signal-to-noise ratio.
	ConstantFalseAlarmRateReferenceCellCount	Gets or sets the number of constant false alarm rate reference cells.
	EnableConstantFalseAlarmRate	Gets or sets a value indicating whether or not to use a constant false alarm rate.
	EvaluateInterference	Gets a value indicating whether or not the scalar should account for interference during the scalar evaluation. (Inherited from SingleTargetRadarLinkScalar.)
	IntendedSignalStrategy	Gets the method used to identify the desired signal for scalar evaluation. (Inherited from SingleTargetRadarLinkScalar.)
	IsFrozen	Gets a value indicating whether this object is frozen. A frozen object cannot be modified and an ObjectFrozenException will be thrown if an attempt is made to do so. (Inherited from DefinitionalObject.)
	ProbabilityOfFalseAlarm	Gets or sets the probability of false alarm used in order to determined the detection threshold.
	RadarReceiver	Gets the IServiceProvider which represents the radar receiver. (Inherited from SingleTargetRadarLinkScalar.)
	RadarTransmitter	Gets the IServiceProvider which represents the radar transmitter. (Inherited from SingleTargetRadarLinkScalar.)
	SignalPropagationGraph	Gets the signal propagation graph. (Inherited from SingleTargetRadarLinkScalar.)
	Target	Gets the IServiceProvider which represents the radar target. (Inherited from SingleTargetRadarLinkScalar.)
	UseLogarithmicSampling	Gets or sets a value indicating whether computed values will be converted to a logarithmic scale when performing sampling for access calculations. Radar scalars can span an extremely large range of values, so in order to avoid comparing values larger than one with values very near zero, the logarithmic scale gives a better means of analyzing the behavior of the function without running into numerical issue with floating point numbers. This value is set by its derived classes and in most cases is set to false by default. (Inherited from SingleTargetRadarLinkScalar.)

Top

Methods

	Name	Description
	Add(Double)	Adds a fixed scalar to this one. (Inherited from Scalar.)
	Add(Scalar)	Adds another scalar to this one. (Inherited from Scalar.)
	CheckForSameDefinition(DefinitionalObject)	Checks to determine if another instance has the same definition as this instance and returns 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 for all derived-class instances. Derived classes should check the type of other to preserve the symmetric nature of IsSameDefinition(Object). (Inherited from Scalar.)
	CheckForSameDefinition(MitchellWalkerProbabilityOfDetectionScalar)	Checks to determine if another instance has the same definition as this instance and returns 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 for all derived-class instances. Derived classes should check the type of other to preserve the symmetric nature of IsSameDefinition(Object).
	CheckForSameDefinition(Scalar)	Checks to determine if another instance has the same definition as this instance and returns 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 for all derived-class instances. Derived classes should check the type of other to preserve the symmetric nature of IsSameDefinition(Object). (Inherited from SingleTargetRadarLinkScalar.)
	CheckForSameDefinition(SingleTargetRadarLinkScalar)	Checks to determine if another instance has the same definition as this instance and returns 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 for all derived-class instances. Derived classes should check the type of other to preserve the symmetric nature of IsSameDefinition(Object). (Overrides SingleTargetRadarLinkScalarCheckForSameDefinition(SingleTargetRadarLinkScalar).)
	Clone	Clones this object using the specified context. (Overrides DefinitionalObjectClone(CopyContext).)
	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 CheckForSameDefinition(DefinitionalObject) method. (Overrides SingleTargetRadarLinkScalarComputeCurrentDefinitionHashCode.)
	CreateScalarDerivative	Constructs a scalar which represents a derivative of this scalar. (Inherited from Scalar.)
	Divide(Double)	Divides this scalar (numerator) by a fixed value (denominator). (Inherited from Scalar.)
	Divide(Scalar)	Divides this scalar (numerator) by another one (denominator). (Inherited from Scalar.)
	EnumerateDependencies	Enumerates the dependencies of this object by calling EnumerateT(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. (Inherited from SingleTargetRadarLinkScalar.)
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	Freeze	Freezes this object. Further attempts to modify it will result in an ObjectFrozenException. (Inherited from DefinitionalObject.)
	FreezeAggregatedObjects	Called by Freeze to also freeze any objects that are considered to be a part of this object. Derived classes which contain additional aggregated objects MUST override this method, call the base implementation, and freeze aggregated objects introduced by the derived class. The objects that need to be frozen in this method are frequently created in this object's constructor and are not settable via properties. (Inherited from SingleTargetRadarLinkScalar.)
	GetDefinitionHashCode	Gets a hash code representing the definition of this object. (Inherited from DefinitionalObject.)
	GetEvaluator	Gets an evaluator that can be used to find the value of this scalar function at a given JulianDate. (Inherited from Scalar.)
	GetEvaluator(EvaluatorGroup)	Gets an evaluator to compute the probability of detection of the received waveform using the Mitchell-Walker algorithm. The probability of detection (PDet) is a function of the signal-to-noise ratio (single pulse or integrated, with or without interference effects), the number of pulses integrated, the probability of false alarm, and the radar cross section (RCS) fluctuation type (SwerlingTargetModel). (Overrides ScalarGetEvaluator(EvaluatorGroup).)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	IsSameDefinition	Determines if this object has the same definition as another object. (Inherited from DefinitionalObject.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	Multiply(Double)	Multiplies this scalar with a fixed value. (Inherited from Scalar.)
	Multiply(Scalar)	Multiplies another scalar with this one. (Inherited from Scalar.)
	Power	Raises this scalar to the given fixed exponent. (Inherited from Scalar.)
	Subtract(Double)	Subtracts a fixed scalar from this one. (Inherited from Scalar.)
	Subtract(Scalar)	Subtracts another scalar from this one. (Inherited from Scalar.)
	ThrowIfFrozen	Throws ObjectFrozenException if this object IsFrozen. This method should be called from any method or property that modifies this object. (Inherited from DefinitionalObject.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)
	ValidateProperties	Validates all properties for use in constructing the signal evaluator. (Overrides SingleTargetRadarLinkScalarValidateProperties.)

Top

Remarks

The algorithm for computing probability of detection comes from Mitchell, R.L. and J.F. Walker, "Recursive Methods for Computing Detection Probabilities," IEEE Transactions on Aerospace Electronic Systems, Vol. 7, No. 4 (July 1971). The SwerlingTargetModel is not directly configured on the scalar instance, but is obtained from the received radar signal. The scalar will look for an instance of PointScattererInformationCollection using the GetDataByType(Type) method on the received signal. The scalar will then try to obtain an instance of SignalSwerlingTargetModel from the last PointScattererInformation instance in the collection. If an instance of the SignalSwerlingTargetModel is found, the SwerlingTargetModel is obtained from SwerlingTargetModel, otherwise None is used, indicating a non-fluctuating radar cross section.

Reference

AGI.Foundation.Radar Namespace