Paper Info
Title
UEP concepts in modulation and coding
Abstract
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. Bitand/ 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.
Year
DOI
Venue
2010
10.1155/2010/416797
Adv. in MM
Keywords
Field
DocType
uep bit-loading,turbo code,arbitrary snr margin,arbitrary number,uep concept,variable-rate ldpc code,optimized pruning pattern,hierarchical modulation,check-irregular ldpc code,uep property,multicarrier modulation
Signal processing,Low-density parity-check code,Computer science,Turbo code,Modulation,Theoretical computer science,Coding (social sciences),Artificial intelligence,Pattern recognition,Algorithm,Puncturing,Hierarchical modulation,Scalability
Journal
Volume
ISSN
Citations 
2010,
1687-5680
4
PageRank 
References 
Authors
0.55
23
6
Name
Order
Citations
PageRank
Werner Henkel114325.07
Khaled Hassan240.55
Neele von Deetzen3302.68
Sara Sandberg4444.72
Lucile Sassatelli59112.87
David Declercq611912.63