Diversity Multiplexing Tradeoff of SIMO Maximal-Ratio Combining Scheme

The Diversity Multiplexing Tradeoff (DMT) (1) is a compact, yet elegant framework to capture the performance of wireless communication systems at asymptotically high signal to noise ratios (SNR). Recent application of DMT at finite SNR (2) makes the DMT a versatile framework. We have analyzed the DMT for the rate-adaptive SIMO maximal-ratio combining (SIMO-MRC) for asymptotic and non-asymptotic signal to noise ratios. This has resulted in arriving at closed form expression of the diversity gain. The DMT arrived by analysis using the non-asymptotic finite SNR framework is found to be consistent with the known interpretations arrived through the asymptotic high-SNR framework (1). The results of this analysis have been presented in this paper.

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