EXIT-Optimized Quantizer Design for Iterative Source-Channel Decoding
Konferenz: TURBO - CODING - 2006 - 4th International Symposium on Turbo Codes & Related Topics; 6th International ITG-Conference on Source and Channel Coding
03.04.2006 - 07.04.2006 in Munich, Germany
Tagungsband: TURBO - CODING - 2006
Seiten: 5Sprache: EnglischTyp: PDF
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Autoren:
Adrat, Marc; Antweiler, Markus (Research Establishment for Applied Sciences (FGAN), Dept. FKIE/KOM, Wachtberg, Germany)
Clevorn, Thorsten; Korall, Bjoern; Vary, Peter (Institute of Communication Systems and Data Processing (IND), RWTH Aachen University, Germany)
Inhalt:
In digital mobile communications the input speech, audio, or video signal has to be quantized before transmission. In this paper, we propose a novel quantizer design strategy which is optimized for the case that iterative source-channel decoding (ISCD) is applied at the receiver site. The combination of the new quantizer with the ISCD scheme reveals a substantially increased error robustness in bad channel conditions at the cost of a tolerable loss of baseline performance in almost error-free situations. This trade-off can smoothly be adjusted.