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On the Optimum Performance Theoretically Attainable for Scalarly Quantized Correlated Sources

Authors:
Thorsten Clevorn, Laurent Schmalen, Peter Vary, and Marc Adrat
Book Title:
Proceedings of International Symposium on Information Theory and its Applications (ISITA)
Venue:
Seoul, Korea
Date:
Oct. 2006
Language:
English

Abstract

Turbo processing enables appropriately designed systems to operate close to their capacity limits. In this contribution we present an upper bound, the optimum performance theoretically attainable (OPTA), that can be achieved when transmitting the samples of scalarly quantized correlated sources. This OPTA limit is based on the combination of the channel capacity and and the distortion rate function. To incorporate the effects of the finite block sizes in real systems, additionally the inevitable loss is taken into account by the spherepacking bound. In a simulation example we present a multi-mode iterative source-channel decoding scheme that is based on highly redundant index assignments. By its Turbo processing at the receiver and due to its multi-mode flexibility this system can approach the OPTA limit in a wide range of channel conditions.

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