Performance analysis of transmit diversity systems with antenna replacement

Seyeong Choi, Hong Chuan Yang, Young-Chai Ko

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We propose a new closed-loop transmit diversity scheme for multiple-input-multiple-output (MIMO) diversity systems based on orthogonal space-time block coding (OSTBC). The receiver of the proposed scheme checks the output signal-to-noise ratio (SNR) of the space-time decoder against an output threshold and requests the transmitter to replace the transmit antenna resulting in the poorest path with an unused antenna if the output SNR is below the threshold. We provide some interesting statistical analysis and obtain closed-form expressions for the cumulative distribution function (cdf), the probability density function (pdf), and the moment-generating function of the received SNR. We show through numerical examples that the proposed scheme offers a significant performance gain with a very minimal feedback load over existing open-loop MIMO diversity systems, and for a properly chosen threshold, its performance is commensurate with a more complicated generalized-selection-combining-based transmit diversity system while requiring a much smaller feedback load.

Original languageEnglish
Pages (from-to)2588-2595
Number of pages8
JournalIEEE Transactions on Vehicular Technology
Volume57
Issue number4
DOIs
Publication statusPublished - 2008 Jul 1

Fingerprint

Transmit Diversity
Performance Analysis
Replacement
Antenna
Signal to noise ratio
Antennas
Multiple-input multiple-output (MIMO)
Output
Space-time
Feedback
Space-time block coding (STBC)
Moment generating function
Cumulative distribution function
Transmitter
Probability density function
Closed-loop
Statistical Analysis
Distribution functions
Transmitters
Statistical methods

Keywords

  • Diversity techniques
  • Fading channels
  • Multiple-input-multiple-output (MIMO)
  • Performance analysis
  • Switched diversity
  • Transmit diversity

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Cite this

Performance analysis of transmit diversity systems with antenna replacement. / Choi, Seyeong; Yang, Hong Chuan; Ko, Young-Chai.

In: IEEE Transactions on Vehicular Technology, Vol. 57, No. 4, 01.07.2008, p. 2588-2595.

Research output: Contribution to journalArticle

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