Publications-Detail
Optimized Bit Rate Allocation for Iterative Source-Channel Decoding and its Extension towards Multi-Mode Transmission
- Authors:
- Adrat, M. , Vary, P. , Clevorn, T.
- Book Title:
- Proceedings of IST Mobile and Wireless Communications Summit
- Organization:
- n.n.
- Address:
- Dresden, Germany
- Date:
- Jun. 2005
- Language:
- English
Abstract
Recent advancements in iterative source-channel decoding (ISCD) focus on the optimization of a single processing step of source coding (like the index assignment) or of channel coding. In this paper, we propose a new design guideline for a more general optimization of the overall ISCD scheme. In particular, we discuss how to allocate a given gross bit rate to source and channel coding.The new bit rate allocation reveals (at least) two benefits: Firstly, the proposed ISCD scheme using a rate r* = 1 channel encoder yields improved error concealing/correcting capabilities if compared to the prior ISCD approaches. Secondly, the new scheme can easily be extended to a flexible multi-mode system. While all modes use the same r* = 1 channel code, the joint adaptation of quantizer resolution and index assignment allows to manage the trade-off between quantization noise and error robustness.
Download
BibTeX- Copyright © by IKS
adrat05b.pdf - This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.