Error Control CodingError Control Coding Pdf Error Control Coding Second Edition Coding Error Message Error Control Coding Schemes The traditional role for error-control coding was to make a troublesome channel acceptable by lowering the frequency of error events. The error events could be bit errors, message errors or undetected errors.
Convolutional Codes. Trellis-Based Decoding Algorithms for Convolutional Codes. Sequential and Threshold Decoding of Convolutional Codes. Trellis-Based Soft-Decision Algorithms for Linear Block Codes. Concatenated Coding, Code Decomposition ad Multistage Decoding. Low Density Parity Check Codes. Error-control coding has become an essential part in most of the digital communication and recording systems. As the amount of digital data that must be transmitted or stored reliably increases, error-control coding is becoming more and more important. ERROR CONTROL CODING During transmission in non-ideal channels, some bits are changed and received with errors. It is a very important task to handle those.
Introduction to Information Theory, HammingCode, Galois Fields, Polynomials over Galois Fields, Linear Block Codes, CyclicCodes, BCH and Reed-Solomon Codes, BCH and RS Decoding Algorithms,
Hadamard and Reed-Muller Codes, ErrorPerformance of Block Codes, Convolutional Codes, Convolutional Code DecodingAlgorithms, Error Performance of Convolutional Codes, Interleaving, CodeConcatenation,
Trellis-Coded Modulation.
Suggested Text: S. Lin, D. Costello, ErrorControl Coding, 2nd Ed., Upper Saddle River: Pearson Prentice Hall,2004 and T.K. Moon, Error Correction Coding: Mathematical Methods andAlgorithms,
HobokenNJ: Wiley, 2006
Schedule:Wednesday 7:00-10 pm, STE J0106
Marking Scheme
Midterm 25%
Term Paper 25%
Final Exam 50%
Assignments
Students are given 4 or 5 assignments during the semester. They are for studypurposes and not to be handed in.
TermPaper
Students will work in groups of two.Students are free to propose a report on any topic related to the coursematerial.It can focus on a specificcode, or its performance under certain conditions, or
applicationsof error control coding to solve a specific problem. Some proposed topicsare
1)LDPC codes and different decodingalgorithms
2)Turbo Codes
3)Polar Codes
4)Application to Error Control Codingto Wireless Communications
5)Application of Coding to High SpeedOptical Networking
6)Staircase codes and their use inhigh speed applications
7)Product Codes
8)Space-Time Block Codes
9)Multilevel Codes
10)Soft Decision Decoding vs HardDecision Decoding
11)High speed soft decision decodingalgorithms
12)Soft decision decoding of RS codes
Midtermexam
The midterm is in the second half of the November 7thclass.Students are allowed on 8.5 by 11sheet of notes (written on both sides).
Final Exam
The final exam will take place in the week following the last week of classes.Students are allowed two 8.5 by 11 sheets of notes (written on bothsides).
Solutionto Assignment 1
SampleAssignment 2
Solutionto Assignment 2
SampleAssignment 3
Solutionto Assignment 3
SampleAssignment 4
Solutionto Assignment 4
SampleAssignment 5
Solutionto Assignment 5
Noteson Groups, Fields and Algebra
Lecture Notes
Lecture1Lecture2Lecture3Lecture4Lecture5Lecture6Lecture7Lecture8Lecture9Lecture10
Lecture11Lecture12Lecture13Lecture14Lecture15Lecture16Lecture17Lecture18Lecture19
Lecture20Lecture21Lecture22
For the final exam, studentsshould study the following lectures : 1-10, 11 first 15 slides only, 12 last 2 slides only,13-14, 15 last 12 slides, 19-20, 21 slides 15-23.
Contactez:
Contact: School of InformationTechnology and Engineering
Copyright © 2001 Université d'Ottawa / University of OttawaWebmestre / Webmaster
Midterm 25%
Term Paper 25%
Final Exam 50%
Students are given 4 or 5 assignments during the semester. They are for studypurposes and not to be handed in.
Students will work in groups of two.Students are free to propose a report on any topic related to the coursematerial.It can focus on a specificcode, or its performance under certain conditions, or
The final exam will take place in the week following the last week of classes.Students are allowed two 8.5 by 11 sheets of notes (written on bothsides).
Copyright © 2001 Université d'Ottawa / University of Ottawa
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Sends a control code to a service.
To specify additional information when stopping a service, use theControlServiceEx function.
Syntax
Parameters
hService
Error Control Coding
A handle to the service. This handle is returned by theOpenService orCreateService function. Theaccess rights required for this handledepend on the dwControl code requested.
dwControl
This parameter can be one of the following control codes.
| Control code | Meaning |
|---|---|
| Notifies a paused service that it should resume. The hService handle must have the SERVICE_PAUSE_CONTINUE access right. |
| Notifies a service that it should report its current status information to the service control manager. The hService handle must have the SERVICE_INTERROGATE access right. Note that this control is not generally useful as the SCM is aware of the current state of the service. |
| Notifies a network service that there is a new component for binding. The hService handle must have the SERVICE_PAUSE_CONTINUE access right. However, this control code has been deprecated; use Plug and Play functionality instead. |
| Notifies a network service that one of its bindings has been disabled. The hService handle must have the SERVICE_PAUSE_CONTINUE access right. However, this control code has been deprecated; use Plug and Play functionality instead. |
| Notifies a network service that a disabled binding has been enabled. The hService handle must have the SERVICE_PAUSE_CONTINUE access right. However, this control code has been deprecated; use Plug and Play functionality instead. |
| Notifies a network service that a component for binding has been removed. The hService handle must have the SERVICE_PAUSE_CONTINUE access right. However, this control code has been deprecated; use Plug and Play functionality instead. |
| Notifies a service that its startup parameters have changed. The hService handle must have the SERVICE_PAUSE_CONTINUE access right. |
| Notifies a service that it should pause. The hService handle must have the SERVICE_PAUSE_CONTINUE access right. |
| Notifies a service that it should stop. The hService handle must have the SERVICE_STOP access right. After sending the stop request to a service, you should not send other controls to the service. |
This value can also be a user-defined control code, as described in the following table.
| Control code | Meaning |
|---|---|
| The service defines the action associated with the control code. The hService handle must have the SERVICE_USER_DEFINED_CONTROL access right. |
lpServiceStatus
A pointer to a SERVICE_STATUS structure thatreceives the latest service status information. The information returned reflects the most recent status thatthe service reported to the service control manager.
The service control manager fills in the structure only whenGetLastError returns one of the following errorcodes: NO_ERROR, ERROR_INVALID_SERVICE_CONTROL,ERROR_SERVICE_CANNOT_ACCEPT_CTRL, orERROR_SERVICE_NOT_ACTIVE. Otherwise, the structure is not filled in.
Return value
Error Control Coding Pdf
Crct help!mr. grahams 8th grade algebra website. If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, callGetLastError.
The following error codes can be set by the service control manager. Other error codes can be set by theregistry functions that are called by the service control manager.
| Return code | Description |
|---|---|
| The handle does not have the required access right. |
| The service cannot be stopped because other running services are dependent on it. |
| The specified handle was not obtained using CreateService or OpenService, or the handle is no longer valid. |
| The requested control code is undefined. |
| The requested control code is not valid, or it is unacceptable to the service. |
| The requested control code cannot be sent to the service because the state of the service is SERVICE_STOPPED, SERVICE_START_PENDING, or SERVICE_STOP_PENDING. |
| The service has not been started. |
| The process for the service was started, but it did not call StartServiceCtrlDispatcher, or the thread that called StartServiceCtrlDispatcher may be blocked in a control handler function. |
| The system is shutting down. |
Remarks
Error Control Coding Second Edition
The ControlService function asks the ServiceControl Manager (SCM) to send the requested control code to the service. The SCM sends the code if the servicehas specified that it will accept the code, and is in a state in which a control code can be sent to it.
The SCM processes service control notifications in a serial fashion—it will wait for oneservice to complete processing a service control notification before sending the next one. Because of this, a callto ControlService will block for 30 seconds if anyservice is busy handling a control code. If the busy service still has not returned from its handler function whenthe timeout expires, ControlService fails withERROR_SERVICE_REQUEST_TIMEOUT. Rosetta stone english classroom.
To stop and start a service requires a security descriptor that allows you to do so. The default securitydescriptor allows the LocalSystem account, and membersof the Administrators and Power Users groups to stop and start services. To change the security descriptor of aservice, seeModifying the DACL for a Service.
The QueryServiceStatusEx function returns aSERVICE_STATUS_PROCESS structurewhose dwCurrentState and dwControlsAccepted members indicatethe current state and controls accepted by a running service. All running services accept theSERVICE_CONTROL_INTERROGATE control code by default. Drivers do not accept control codesother than SERVICE_CONTROL_STOP andSERVICE_CONTROL_INTERROGATE. Each service specifies the other control codes that itaccepts when it calls the SetServiceStatus functionto report its status. A service should always accept these codes when it is running, no matter what it isdoing.
The following table shows the action of the SCM in each of the possible service states.
| Service state | Stop | Other controls |
|---|---|---|
| STOPPED | (c) | (c) |
| STOP_PENDING | (b) | (b) |
| START_PENDING | (a) | (b) |
| RUNNING | (a) | (a) |
| CONTINUE_PENDING | (a) | (a) |
| PAUSE_PENDING | (a) | (a) |
| PAUSED | (a) | (a) |
Examples
For an example, see Stopping a Service.
Coding Error Message
Requirements
Error Control Coding Schemes
| Minimum supported client | Windows XP [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Target Platform | Windows |
| Header | winsvc.h (include Windows.h) |
| Library | AdvApi32.lib |
| DLL | AdvApi32.dll |
See also