UEP Concepts in Modulation and Coding
UEP Concepts in Modulation and Coding
复制标题
调制和编码中的 UEP 概念
DOI:
10.1155/2010/416797
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发表时间:
2010
期刊:
影响因子:
--
通讯作者:
D. Declercq
中科院分区:
文献类型:
--
作者:
W. Henkel;K. Hassan;N. von Deetzen;S. Sandberg;L. Sassatelli;D. Declercq
First unequal error protection (UEP) proposals date back to the 1960′s (Masnick and Wolf; 1967), but now with the introduction of scalable video, UEP develops to a key concept for the transport of multimedia data. The paper presents an overview of some new approaches realizing UEP properties in physical transport, especially multicarrier modulation, or with LDPC and Turbo codes. For multicarrier modulation, UEP bit‐loading together with hierarchical modulation is described allowing for an arbitrary number of classes, arbitrary SNR margins between the classes, and arbitrary number of bits per class. In Turbo coding, pruning, as a counterpart of puncturing is presented for flexible bit‐rate adaptations, including tables with optimized pruning patterns. Bit‐ and/or check‐irregular LDPC codes may be designed to provide UEP to its code bits. However, irregular degree distributions alone do not ensure UEP, and other necessary properties of the parity‐check matrix for providing UEP are also pointed out. Pruning is also the means for constructing variable‐rate LDPC codes for UEP, especially controlling the check‐node profile.
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DOI:
--
发表时间:
2006
期刊:
2006 International Zurich Seminar on Communications
影响因子:
--
作者:
W. Henkel;N. von Deetzen
通讯作者:
N. von Deetzen
DOI:
--
发表时间:
2003
影响因子:
0.5
作者:
K. Kasai;T. Shibuya;K. Sakaniwa
通讯作者:
K. Sakaniwa
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
K. Hassan;W. Henkel
通讯作者:
W. Henkel
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
L. Sassatelli;W. Henkel;D. Declercq
通讯作者:
D. Declercq
DOI:
--
发表时间:
1999
期刊:
Conference Record of the Thirty-Third Asilomar Conference on Signals, Systems, and Computers (Cat. No.CH37020)
影响因子:
--
作者:
Fengqi Yu;A. Willson
通讯作者:
A. Willson