Layered cooperative source and channel coding

Xiaofeng Xu, Deniz Gunduz, Elza Erkip, Yao Wang

Research output: Contribution to journalConference articlepeer-review

Abstract

Cooperative techniques form a new wireless communication paradigm in which terminals help each other in relaying information to combat the random fading and to provide diversity in radio channels. Past work has focused on improving channel reliability through cooperation. We propose to jointly allocate bits among source coding, channel coding and cooperation to minimize the expected source distortion. Recognizing that not all source bits are equal, we further propose to protect the more important bits through user cooperation. To evaluate the gain of layered cooperation, we simulate four modes of communications that differ in their error protection strategy (equal vs. layered, with vs. without cooperation) with a practical channel coder, and show that, for i.i.d. Gaussian sources, layered cooperation can achieve significant performance gains over non-layered/non-cooperative communication. We also carry out an information theoretic analysis illustrating fundamental benefits of layered cooperation.

Original languageEnglish (US)
Pages (from-to)1200-1204
Number of pages5
JournalIEEE International Conference on Communications
Volume2
StatePublished - 2005
Event2005 IEEE International Conference on Communications, ICC 2005 - Seoul, Korea, Republic of
Duration: May 16 2005May 20 2005

Keywords

  • Cooperative diversity
  • Layered compression
  • Source and channel coding
  • Unequal error protection

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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