Effros, Michelle and Koetter, Ralf and Goldsmith, Andrea J. and Médard, Muriel (2005) On source and channel codes for multiple inputs and outputs: does multiple description beat space time? In: IEEE Information Theory Workshop (ITW '04), San Antonio, TX, 24-29 October 2004. IEEE , Piscataway, NJ, pp. 324-329. ISBN 0 7803 8720 1. https://resolver.caltech.edu/CaltechAUTHORS:EFFitw04
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Abstract
We compare two strategies for lossy source description across a pair of unreliable channels. In the first strategy, we use a broadcast channel code to achieve a different rate for each possible channel realization, and then use a multiresolution source code to describe the source at the resulting rates. In the second strategy, we use a channel coding strategy for two independent channels coupled with a multiple description source code. In each case, we choose the coding parameters to minimize the expected end-to-end distortion in the source reconstruction. We demonstrate that in point-to-point communication across a pair of non-ergodic channels, multiple description coding can provide substantial gains relative to multiresolution and broadcast coding. We then investigate this comparison in a simple MIMO channel. We demonstrate the inferior performance of space time coding with multiresolution source coding and broadcast channel coding relative to multiple description codes and a time sharing channel coding strategy. These results indicate that for non-ergodic channels, the traditional definition of channel capacity does not necessarily lead to the best channel code from the perspective of end-to-end source distortion.
Item Type: | Book Section | ||||||
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Additional Information: | © Copyright 2006 IEEE – Reprinted with permission. This work was supported in part by NSF Grant #0325324. | ||||||
Subject Keywords: | MIMO systems, broadcast channels, channel capacity, combined source-channel coding, minimization, space-time codes | ||||||
DOI: | 10.1109/ITW.2004.1405323 | ||||||
Record Number: | CaltechAUTHORS:EFFitw04 | ||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:EFFitw04 | ||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
ID Code: | 7359 | ||||||
Collection: | CaltechAUTHORS | ||||||
Deposited By: | Lindsay Cleary | ||||||
Deposited On: | 06 Feb 2007 | ||||||
Last Modified: | 08 Nov 2021 20:42 |
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