CaltechAUTHORS
  A Caltech Library Service

On source and channel codes for multiple inputs and outputs: does multiple description beat space time?

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 http://resolver.caltech.edu/CaltechAUTHORS:EFFitw04

[img]
Preview
PDF
See Usage Policy.

430Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:EFFitw04

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
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
Record Number:CaltechAUTHORS:EFFitw04
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:EFFitw04
Alternative URL:http://dx.doi.org/10.1109/ITW.2004.1405323
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:26 Dec 2012 09:31

Repository Staff Only: item control page