A quasi-orthogonal group space-time architecture to achieve a better diversity-multiplexing tradeoff

Lin Dai, Sana Sfar, Khaled Letaief

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Most existing MIMO (Multiput-Input Multiput-Output) schemes optimize only either the diversity gain or the multiplexing gain. To obtain a good tradeoff between these two, the Quasi-Orthogonal Group Space-Time (QoGST) architecture is proposed, wherein the transmit stream is subgrouped but encoded via an inter-group space-time block encoder, with group interference suppression at the receiver. This paper also considers another combined space-time coding and layered space-time architecture, which we refer to as Group Layered Space-Time (GLST), where space-time block coding is employed within each group. Under the assumption of Rayleigh fading and a prior perfect channel state information at the receiver, a performance analysis will demonstrate that both QoGST and GLST can achieve a good diversity-multiplexing tradeoff. QoGST is even superior to GLST. Simulation results will validate our analysis and further show that compared to the existent Layered Space-Time Block Code (LSTBC) scheme, both QoGST and GLST can achieve a significant performance gain.

Original languageEnglish
Pages (from-to)1295-1306
Number of pages12
JournalIEEE Transactions on Wireless Communications
Volume6
Issue number4
DOIs
Publication statusPublished - Apr 2007
Externally publishedYes

    Fingerprint

Keywords

  • Diversity-multiplexing tradeoff
  • Group detection
  • Layered space-time
  • MIMO systems
  • Quasi-orthogonal group space-time
  • Space-time block coding

ASJC Scopus subject areas

  • Engineering(all)
  • Computer Networks and Communications

Cite this