On the Diversity-Multiplexing Tradeoff in MIMO Wireless Channels at Finite SNRs

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概要

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• In this paper, a new framework to characterize the tradeoff between diversity and multiplexing gains of Multi Input Multi Output (MIMO) wireless systems at finite Signal to Noise Ratios (SNRs) is presented. By suitable definitions of non-asymptotic diversity and multiplexing gains, we extract a useful tool to investigate the performance of space-time schemes at finite SNRs. Exact results on the diversity-multiplexing tradeoff (DMT) are derived for Multi Input Single Output (MISO), Single Input Multi Output (SIMO), and 2 × 2 MIMO channels. We show that our outcomes coincide with the Zheng and Tses results at high SNRs. When the new definitions of non-asymptotic diversity and multiplexing gains are used, the resulted DMT converges to its asymptotic value at realistic SNRs. Furthermore, using these definitions enables the diversity gain to represent the outage probability with reasonable accuracy.

• （社）電子情報通信学会の論文
• 2010-11-01

著者

• Mohammadi Abbas

  Dept Of Elec. Eng. Amirkabir University Of Technology (tehran Polytechnic)

• EBRAHIMZAD Hamid

  Dept of Elec. Eng., Amirkabir University of Technology (Tehran Polytechnic)

• Ebrahimzad Hamid

  Dept Of Elec. Eng. Amirkabir University Of Technology (tehran Polytechnic)

関連論文

• On the Diversity-Multiplexing Tradeoff in MIMO Wireless Channels at Finite SNRs

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