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Iterative joint source-channel decoding of variable-length codes using residual source redundancy
University of Kiel. (Institute for Circuits and Systems Theory)
University of Kiel. (Institute for Circuits and Systems Theory)ORCID-id: 0000-0001-9307-484X
2005 (engelsk)Inngår i: IEEE Transactions on Wireless Communications, ISSN 1536-1276, E-ISSN 1558-2248, Vol. 4, nr 3, s. 919-929Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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.

sted, utgiver, år, opplag, sider
2005. Vol. 4, nr 3, s. 919-929
Emneord [en]
iterative decoding, joint source-channel coding, residual source redundancy, variable-length codes (VLCs)
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-14734DOI: 10.1109/TWC.2005.847032ISI: 000228937400014Scopus ID: 2-s2.0-18844443456OAI: oai:DiVA.org:kth-14734DiVA, id: diva2:332775
Merknad

QC 20100525

Tilgjengelig fra: 2010-08-05 Laget: 2010-08-05 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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