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On the error exponent of MIMO-ARQ system over the fast fading channels

In this paper, the random coding exponent for fast fading multi-input multi-output channel equipped with automatic repeat request (ARQ) protocol is derived. This exponent can be used to express the probability of error as a function of the data rate and codeword length. This measure provides an intuition into a fundamental trade-off between communication reliability, information rate and delay. This paper shows that using multiple antenna and ARQ techniques are promising tools for communication over fast fading channels. Copyright © 2011 John Wiley & Sons, Ltd.