ptolemy.actor.lib.comm
Class TrellisDecoder
java.lang.Object
ptolemy.kernel.util.NamedObj
ptolemy.kernel.InstantiableNamedObj
ptolemy.kernel.Entity
ptolemy.kernel.ComponentEntity
ptolemy.actor.AtomicActor
ptolemy.actor.TypedAtomicActor
ptolemy.actor.lib.Transformer
ptolemy.actor.lib.comm.ViterbiDecoder
ptolemy.actor.lib.comm.TrellisDecoder
- All Implemented Interfaces:
- java.io.Serializable, java.lang.Cloneable, Actor, Executable, FiringsRecordable, Initializable, TypedActor, Changeable, Debuggable, DebugListener, Derivable, Instantiable, ModelErrorHandler, MoMLExportable, Moveable, Nameable
public class TrellisDecoder
- extends ViterbiDecoder
The TrellisDecoder is a generalization of the ViterbiDecoder. It
can handle trellis coding, which has non-antipodal constellation.
For a k/n convolutional code, the constellation
should map each codeword into a complex number. Hence the length
of the constellation should be a complex array of length
2n. For example, a 1/2 rate convolutional code
should use 4PSK. a k/3 convolutional code should use 8PSK.
The input port of the TrellisDecoder is complex. On each firing,
the TrellisDecoder reads one input. The Euclidean distance is defined
as the distance between the noisy input and the point in the
constellation mapped from the codeword. Like in ViterbiDecoder,
this actor produces k outputs on each firing.
See ConvolutionalCoder and ViterbiDecoder for details about
the meaning of these parameters.
For more information on convolutional codes, Viterbi decoder, and
trellis coding, see the ConvolutionalCoder actor, ViterbiDecoder
actor and Proakis, Digital Communications, Fourth Edition,
McGraw-Hill, 2001, pp. 471-477 and pp. 482-485,
or Barry, Lee and Messerschmitt, Digital Communication, Third Edition,
Kluwer, 2004.
- Since:
- Ptolemy II 4.0
- Version:
- $Id: TrellisDecoder.java 57040 2010-01-27 20:52:32Z cxh $
- Author:
- Ye Zhou, contributor: Edward A. Lee
- See Also:
- Serialized Form
- Accepted Rating:
- Proposed Rating:
| Fields inherited from class ptolemy.kernel.util.NamedObj |
_changeListeners, _changeLock, _changeRequests, _debugging, _debugListeners, _elementName, _isPersistent, _verbose, _workspace, ATTRIBUTES, CLASSNAME, COMPLETE, CONTENTS, DEEP, FULLNAME, LINKS |
| Methods inherited from class ptolemy.actor.AtomicActor |
_actorFiring, _actorFiring, addActorFiringListener, addInitializable, connectionsChanged, createReceivers, declareDelayDependency, getCausalityInterface, getDirector, getExecutiveDirector, getManager, inputPortList, isFireFunctional, isStrict, iterate, newReceiver, outputPortList, prefire, preinitialize, pruneDependencies, recordFiring, removeActorFiringListener, removeDependency, removeInitializable, setContainer, stop, stopFire, terminate, wrapup |
| Methods inherited from class ptolemy.kernel.ComponentEntity |
_adjustDeferrals, _checkContainer, _getContainedObject, _propagateExistence, getContainer, instantiate, isAtomic, isOpaque, moveDown, moveToFirst, moveToIndex, moveToLast, moveUp, propagateExistence, setName |
| Methods inherited from class ptolemy.kernel.Entity |
_description, _exportMoMLContents, _removePort, _validateSettables, connectedPortList, connectedPorts, containedObjectsIterator, getAttribute, getPort, getPorts, linkedRelationList, linkedRelations, portList, removeAllPorts, setClassDefinition, uniqueName |
| Methods inherited from class ptolemy.kernel.util.NamedObj |
_addAttribute, _adjustOverride, _attachText, _cloneFixAttributeFields, _debug, _debug, _debug, _debug, _debug, _getIndentPrefix, _isMoMLSuppressed, _markContentsDerived, _propagateValue, _recordDecoratedAttributes, _removeAttribute, _splitName, _stripNumericSuffix, addChangeListener, addDebugListener, attributeList, attributeList, deepContains, depthInHierarchy, description, description, event, executeChangeRequests, exportMoML, exportMoML, exportMoML, exportMoML, exportMoMLPlain, getAttribute, getAttributes, getChangeListeners, getClassName, getDecoratorAttribute, getDecoratorAttributes, getDerivedLevel, getDerivedList, getDisplayName, getFullName, getModelErrorHandler, getName, getName, getSource, handleModelError, isDeferringChangeRequests, isOverridden, isPersistent, lazyContainedObjectsIterator, message, propagateValue, propagateValues, removeChangeListener, removeDebugListener, requestChange, setClassName, setDeferringChangeRequests, setDerivedLevel, setDisplayName, setModelErrorHandler, setPersistent, setSource, sortContainedObjects, toplevel, toString, validateSettables, workspace |
| Methods inherited from class java.lang.Object |
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
TrellisDecoder
public TrellisDecoder(CompositeEntity container,
java.lang.String name)
throws NameDuplicationException,
IllegalActionException
- Construct an actor with the given container and name.
The output and trigger ports are also constructed.
- Parameters:
container - The container.name - The name of this actor.
- Throws:
IllegalActionException - If the entity cannot be contained
by the proposed container.
NameDuplicationException - If the container already has an
actor with this name.