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

Michelle Effros, Ralf Koetter, Andrea J. Goldsmith, Muriel Médard

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Scopus citations

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 mulitresolution 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.

Original languageEnglish (US)
Title of host publication2004 IEEE Information Theory Workshop - Proceedings, ITW
Pages324-329
Number of pages6
StatePublished - 2004
Externally publishedYes
Event2004 IEEE Information Theory Workshop - Proceedings, ITW - San Antonio, TX, United States
Duration: Oct 24 2004Oct 29 2004

Publication series

Name2004 IEEE Information Theory Workshop - Proceedings, ITW

Other

Other2004 IEEE Information Theory Workshop - Proceedings, ITW
CountryUnited States
CitySan Antonio, TX
Period10/24/0410/29/04

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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