EXIT-Optimized Quantizer Design for Iterative Source-Channel Decoding

Authors:

Adrat, M. ,  Antweiler, M. ,  Clevorn, T. ,  Korall, B. ,  Vary, P.

Book Title:

Proceedings of International Symposium on Turbo Codes & Related Topics

Address:

Munich, Germany

Date:

Apr. 2006

Language:

English

Abstract

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 sourcechannel 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.

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