Paper Info
Title
Iterative joint source-channel decoding of variable-length codes using residual source redundancy
Abstract
We present a novel symbol-based soft-input a posteriori probability (APP) decoder for packetized variable-length encoded source indexes transmitted over wireless channels where the residual redundancy after source encoding is exploited for error protection. In combination with a mean-square or maximum APP estimation of the reconstructed source data, the whole decoding process is close to optimal. Furthermore, solutions for the proposed APP decoder with reduced complexity are discussed and compared to the near-optimal solution. When, in addition, channel codes are employed for protecting the variable-length encoded data, an iterative source-channel decoder can be obtained in the same way as for serially concatenated codes, where the proposed APP source decoder then represents one of the two constituent decoders. The simulation results show that this iterative decoding technique leads to substantial error protection for variable-length encoded correlated source signals, especially, when they are transmitted over highly corrupted channels.
Year
DOI
Venue
2005
10.1109/TWC.2005.847032
IEEE Transactions on Wireless Communications
Keywords
Field
DocType
combined source-channel coding,concatenated codes,iterative decoding,mean square error methods,probability,residue codes,variable length codes,a posteriori probability decoder,channel code,error protection,iterative joint source-channel decoding,mean-square estimation,residual source redundancy,serially concatenated code,variable-length code,wireless channel,Iterative decoding,joint source-channel coding,residual source redundancy,variable-length codes (VLCs)
Residual,Concatenated error correction code,Source data,Iterative method,Computer science,Algorithm,Real-time computing,Theoretical computer science,Redundancy (engineering),Soft-decision decoder,Decoding methods,Variable-length code
Journal
Volume
Issue
ISSN
4
3
1536-1276
Citations 
PageRank 
References 
22
1.10
14
Authors
2
Name
Order
Citations
PageRank
J. Kliewer121813.51
Ragnar Thobaben229530.12