On the diversity gain in cooperative relaying channels with imperfect CSIT

Xiao Juan Zhang, Yi Gong, Khaled Letaief

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

In this paper, we investigate the impact of imperfect channel state information at the transmitters (CSIT) on the achievable diversity gain in a cooperative relaying channel with multiple destination antennas, where the CSIT comes from channel estimation at the transmitters. Both decode-and-forward (DF) and amplify-and-forward (AF) relaying protocols are considered. We show that transmit power control based on the imperfect CSIT significantly improves the achievable diversity gain. The diversity and multiplexing tradeoff (DMT) as a function of the CSIT quality of the source-relay link, source-destination link and relay-destination link is derived for each of the considered relaying schemes. An upper bound on the DMT of the relaying channel is also provided.

Original languageEnglish
Article number5439330
Pages (from-to)1273-1279
Number of pages7
JournalIEEE Transactions on Communications
Volume58
Issue number4
DOIs
Publication statusPublished - Apr 2010
Externally publishedYes

Fingerprint

Channel state information
Transmitters
Multiplexing
Telecommunication links
Telecommunication repeaters
Channel estimation
Power control
Antennas

Keywords

  • Channel state information
  • Diversity
  • Diversity and multiplexing tradeoff
  • Relaying channel
  • Spatial multiplexing

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

On the diversity gain in cooperative relaying channels with imperfect CSIT. / Zhang, Xiao Juan; Gong, Yi; Letaief, Khaled.

In: IEEE Transactions on Communications, Vol. 58, No. 4, 5439330, 04.2010, p. 1273-1279.

Research output: Contribution to journalArticle

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