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Hybrid ARQ in Multiple-Antenna Slow Fading Channels: Performance Limits and Optimal Linear Dispersion Code Design

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2 Author(s)
Cong Shen ; Dept. of Electr. Eng., Univ. of California Los Angeles, Los Angeles, CA, USA ; Fitz, M.P.

This paper focuses on studying the fundamental performance limits and linear dispersion code design for the MIMO-ARQ slow fading channel. The optimal average rate of well-known HARQ protocols is analyzed. The optimal design of space-time coding for the MIMO-ARQ channel is discussed. Information-theoretic measures are used to optimize the rate assignment and derive the optimum design criterion, which is then used to evaluate the optimality of existing space-time codes. A different design criterion, which is obtained from the error probability analysis of space-time coded MIMO-HARQ, is presented. Examples are studied to reveal the gain of ARQ feedback in space-time coded MIMO systems.

Published in:

Information Theory, IEEE Transactions on  (Volume:57 ,  Issue: 9 )

Date of Publication:

Sept. 2011

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