Towards a better diversity-multiplexing tradeoff in MIMO systems

Lin Dai, Sana Sfar, Khaled B. Letaief

Research output: Contribution to journalConference article

4 Citations (Scopus)


Multiple-Input Multiple-Output (MIMO) systems can provide two kinds of gain: diversity gain and multiplexing gain. Most existing MIMO schemes, including space-time coding and layered space-time, aim at maximizing either of them. Group transmission and detection is a good way to get a tradeoff between these two gains. In this paper, the diversity-multiplexing tradeoff functions of 3 schemes based on group transmission and detection, Quasi-Orthogonal Group Space-Time (QoGST), Group Layered Space-Time (GLST) and Layered space-time block codes (LSTBC), are provided and a vivid comparison among them demonstrates that QoGST achieves the best diversity-multiplexing tradeoff. GLST also gets significant gains over LSTBC. Simulation results will validate the analysis and show that QoGST can achieve at least 3 dB gain over GLST and 12 dB over LSTBC at a FER of 10-3, for instance.

Original languageEnglish
Pages (from-to)2422-2426
Number of pages5
JournalIEEE International Conference on Communications
Publication statusPublished - 12 Sep 2005
Event2005 IEEE International Conference on Communications, ICC 2005 - Seoul, Korea, Republic of
Duration: 16 May 200520 May 2005



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

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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