Capacity and Optimal Power Allocation for Fading Broadcast Channels with Minimum Rates

Nihar Jindal, Andrea Goldsmith

Research output: Contribution to journalArticlepeer-review

81 Scopus citations

Abstract

We derive the capacity region and optimal power allocation scheme for a slowly fading broadcast channel in which minimum rates must be maintained for each user in all fading states, assuming perfect channel state information at the transmitter and at all receivers. We show that the minimum-rate capacity region can be written in terms of the ergodic capacity region of a broadcast channel with an effective noise determined by the minimum rate requirements. This allows us to characterize the optimal power allocation schemes for minimum-rate capacity in terms of the optimal power allocations schemes that maximize ergodic capacity of the broadcast channel with effective noise. Numerical results are provided for different fading broadcast channel models.

Original languageEnglish (US)
Pages (from-to)2895-2909
Number of pages15
JournalIEEE Transactions on Information Theory
Volume49
Issue number11
DOIs
StatePublished - Nov 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

Keywords

  • Broadcast channel
  • Capacity region
  • Fading channels
  • Minimum rates
  • Optimal resource allocation

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