Scaling laws of multiple antenna group-broadcast channels

Tareq Al-Naffouri*, Amir Dana, Babak Hassibi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Broadcast (or point to multipoint) communication has attracted a lot of research recently. In this paper, we consider the group broadcast channel where the users' pool is divided into groups, each of which is interested in common information. Such a situation occurs for example in digital audio and video broadcast where the users are divided into various groups according to the shows they are interested in. The paper obtains upper and lower bounds for the sum rate capacity in the large number of users regime and quantifies the effect of spatial correlation on the system capacity. The paper also studies the scaling of the system capacity when the number of users and antennas grow simultaneously. It is shown that in order to achieve a constant rate per user, the number of transmit antennas should scale at least logarithmically in the number of users.

Original languageEnglish (US)
Article number4712721
Pages (from-to)5030-5038
Number of pages9
JournalIEEE Transactions on Wireless Communications
Volume7
Issue number12
DOIs
StatePublished - Dec 1 2008

Keywords

  • Broadband
  • MIMO systems
  • Mobile communication systems
  • Systems
  • Transmit diversity
  • Wireless personal communication

ASJC Scopus subject areas

  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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