scholarly journals Robust IPTV Delivery with Adaptive Rateless Coding over a Mobile WiMAX Channel

2011 ◽  
Vol 2011 ◽  
pp. 1-11 ◽  
Author(s):  
Laith Al-Jobouri ◽  
Martin Fleury ◽  
Mohammad Ghanbari
Keyword(s):  
Channel Coding ◽  
Forward Error Correction ◽  
Content Management ◽  
Mobile Wimax ◽  
Application Layer ◽  
Ieee 802.16E ◽  
Coding Schemes ◽  
Redundant Data ◽  
Trade Offs ◽  
Forward Error

As intelligent content management of IPTV moves popular material nearer to the end-user, application-layer channel coding schemes, involving the retransmission of extra redundant data, become attractive as a result of the reduced latency. Application-layer, adaptive rateless channel coding is exploited in this paper's scheme to reconstruct streamed video across an IEEE 802.16e (mobile WiMAX) channel. The paper concentrates on the trade-offs in implementing the scheme, showing that exact calculation of the redundant data has the potential to reduce the forward error correction bit-rate overhead. To reduce delay, an appropriate compression rate should also be selected.

Application Layer Forward Error Correction for Mobile Multimedia Broadcasting

2008 ◽  
pp. 239-278 ◽  
Author(s):  
Thomas Stockhammer ◽  
Amin Shokrollahi ◽  
Mark Watson ◽  
Michael Luby ◽  
Tiago Gasiba
Keyword(s):  
Error Correction ◽  
Forward Error Correction ◽  
Mobile Multimedia ◽  
Application Layer ◽  
Forward Error

scholarly journals Energy Efficiency of a Decode-and-Forward Multiple-Relay Network with Rate Adaptive LDPC Codes

Sensors ◽  
2019 ◽  
Vol 19 (21) ◽  
pp. 4793 ◽  
Author(s):  
Bushra Bashir Chaoudhry ◽  
Syed Ali Hassan ◽  
Joachim Speidel ◽  
Haejoon Jung
Keyword(s):  
Energy Efficiency ◽  
Channel Coding ◽  
Forward Error Correction ◽  
Ldpc Codes ◽  
Maximum Energy ◽  
Cooperative Transmission ◽  
Relay Network ◽  
Decode And Forward ◽  
Forward Error ◽  
Multiple Relay

This paper presents cooperative transmission (CT), where multiple relays are used to achieve array and diversity gains, as an enabling technology for Internet of Things (IoT) networks with hardware-limited devices. We investigate a channel coding aided decode-and-forward (DF) relaying network, considering a two-hop multiple-relay network, where the data transmission between the source and the destination is realized with the help of DF relays. Low density parity check (LDPC) codes are adopted as forward error correction (FEC) codes to encode and decode the data both at the source and relays. We consider both fixed and variable code rates depending upon the quality-of-service (QoS) provisioning such as spectral efficiency and maximum energy efficiency. Furthermore, an optimal power allocation scheme is studied for the cooperative system under the energy efficiency constraint. We present the simulation results of our proposed scheme, compared with conventional methods, which show that if decoupled code rates are used on both hops then a trade-off has to be maintained between system complexity, transmission delay, and bit error rate (BER).

Forward Error Correction by Means of Microprocessors

1980 ◽  
Vol 17 (1) ◽  
pp. 67-75
Author(s):  
D. H. Green ◽  
A. P. Ambler
Keyword(s):  
Error Correction ◽  
Error Control ◽  
Forward Error Correction ◽  
Error Control Coding ◽  
Coding Schemes ◽  
Data Rates ◽  
Forward Error

The feasibility of employing a microprocessor to perform the various tasks involved with the implementation of a number of well known error-control coding schemes is investigated. It is demonstrated that reasonable data-rates can be achieved with even quite powerful codes.

scholarly journals COMPARISON OF THE PROBABILISTIC CHARACTERISTICS OF 8-BIT CODES WITH FORWARD ERROR CORRECTION

Telecom IT ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 21-30
Author(s):  
S. Vladimirov
Keyword(s):  
Error Correction ◽  
Forward Error Correction ◽  
Communication Channels ◽  
Error Correcting Codes ◽  
Transmission System ◽  
Practical Relevance ◽  
Research Subject ◽  
Application Layer ◽  
Characteristics Method ◽  
Forward Error

Research subject. The article presents the results of comparing different 8-bit error-correcting codes by their probabilistic characteristics. Method. Simulation was performed to determine the probabilistic characteristics of 8-bit error-correcting codes. The principles of their coding and decoding are considered. Core results. The probabilistic characteristics of 8-bit error-correcting codes are identified and presented. Recommendations for their application are developed depending on the structure of the using transmission system. Practical relevance. The application of the considered codes for the construction of transmission systems on devices with limited computing resources is proposed. The applicability of these codes in the development of application layer byte protocols that require the use of forward error correction mechanisms in communication channels is noted.

scholarly journals Improving the performance of BICM-ID and MLC systems with different FEC codes

2013 ◽  
Vol 11 ◽  
pp. 87-93 ◽  
Author(s):  
T. Arafa ◽  
W. Sauer-Greff ◽  
R. Urbansky
Keyword(s):  
Turbo Codes ◽  
Channel Coding ◽  
Communication Systems ◽  
Forward Error Correction ◽  
Convolutional Codes ◽  
Coded Modulation ◽  
Modulation Formats ◽  
Coding Schemes ◽  
Multilevel Modulation ◽  
Exit Charts

Abstract. In bandwidth limited communication systems, the high data rate transmission with performance close to capacity limits is achieved by applying multilevel modulation schemes in association with powerful forward error correction (FEC) coding, i.e. coded modulation systems. The most important practical approaches to coded modulation systems are multilevel coding with multistage decoding (MLC/MSD) and bit interleaved coded modulation with iterative demapping and decoding (BICM-ID). Multilevel modulation formats such as M-QAM, which can be used as a part of coded modulation systems, have the capability of multilevel protection. Based on this fact, we investigate the methods to improve the performance of BICM-ID using multiple interleavers with different binary channel coding schemes such as convolutional codes, turbo codes and low-density parity-check (LDPC) codes. Moreover, an MLC system with parallel decoding on levels (PDL) at the receiver is considered. In our contribution, we propose to design the individual coding schemes using the extrinsic information transfer (EXIT) charts for individual bit levels in the constellation. Our simulation results show that the BICM-ID systems, taking into account different bit-level protections, can provide an improvement of 0.65 dB, 1.2 dB and 1.5 dB for 256-QAM with turbo, LDPC and convolutional codes, respectively. On the other hand, MLC systems with PDL designed using EXIT charts for individual bit levels can slightly improve the performance and eliminate the error floor compared to the systems with MSD.

scholarly journals Channel Coding in Optical Communication Systems

2016 ◽  
Vol 4 (2) ◽  
pp. 1-5
Author(s):  
Viktor Durcek ◽  
◽  
Michal Kuba ◽  
Milan Dado
Keyword(s):  
Error Correction ◽  
Optical Networks ◽  
Optical Communication ◽  
Channel Coding ◽  
Communication Systems ◽  
High Speed ◽  
Forward Error Correction ◽  
Error Correcting Codes ◽  
Optical Communication Systems ◽  
Forward Error

In this paper, an overview of various types of error-correcting codes is present. Three generations of forward error correction methods used in optical communication systems are listed and described. Forward error correction schemes proposed for use in future high-speed optical networks can be found in the third generation of codes.

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