On the outage and diversity-multiplexing tradeoff of broadcast channels with 1-bit feedback

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

1 Scopus citations

Abstract

In this paper, a single antenna downlink channel with K users is analyzed in the presence of Rayleigh flat fading. A limited channel state information (CSI) feedback scheme is considered, where only 1-bit feedback per user is available at the base station for each fading block. We study the outage performance of such channels. The two cases of short-term and long-term average power constraints are analyzed. Closed-form expressions for the outage probability of the 1-bit feedback scheme are presented. At high SNR, the diversity-multiplexing tradeoff (DMT) is explicitly derived. We show that for the short-term average power constraint case, with only 1-bit feedback, the scheme achieves not only a DMT that increases linearly with the number of users in the system, but also the same tradeoff as if perfect CSI feedback were available at the base station. For long-term average power constraint, it is concluded that power allocation based on the feedback bit is crucial in further improving the DMT. An additional factor of two in the DMT is achieved compared with the short-term average power constraint case.

Original languageEnglish (US)
Title of host publication2010 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2010 - Proceedings
Pages3370-3373
Number of pages4
DOIs
StatePublished - Nov 8 2010
Event2010 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2010 - Dallas, TX, United States
Duration: Mar 14 2010Mar 19 2010

Publication series

NameICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
ISSN (Print)1520-6149

Other

Other2010 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2010
Country/TerritoryUnited States
CityDallas, TX
Period3/14/103/19/10

All Science Journal Classification (ASJC) codes

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering

Keywords

  • Diversity-multiplexing tradeoff
  • Limited feedback
  • Multiuser diversity
  • Outage probability
  • Power allocation

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