Outage capacities and optimal power allocation for fading multiple-access channels

Lifang Li, Nihar Jindal, Andrea Goldsmith

Research output: Contribution to journalArticlepeer-review

93 Scopus citations


We derive the outage capacity region of an M-user fading multiple-access channel (MAC) under the assumption that both the transmitters and the receiver have perfect channel side information (CSB). The outage capacity region is implicitly obtained by deriving the outage probability region for a given rate vector. Given a required rate and average power constraint for each user, we find a successive decoding strategy and a power allocation policy that achieves points on the boundary of the outage probability region. We discuss the scenario where an outage must be declared simultaneously for ali users (common outage) and when outages can be declared individually (individual outage) for each user.

Original languageEnglish (US)
Pages (from-to)1326-1347
Number of pages22
JournalIEEE Transactions on Information Theory
Issue number4
StatePublished - Apr 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Computer Science Applications
  • Library and Information Sciences


  • Capacity region
  • Fading channels
  • Multiple-access channels (MACs)
  • Optimal power allocation
  • Outage probability


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