Diversity Analysis of Symbol-by-Symbol Linear Equalizers

Details Diversity Analysis of Symbol-by-Symbol Linear Equalizers Diversity Analysis of Symbol-by-Symbol Linear Equalizers

2011-04-14

arxiv.org/abs/1104.2784v1

Computer Science

Information Theory

Scientific paper

In frequency-selective channels linear receivers enjoy significantly-reduced complexity compared with maximum likelihood receivers at the cost of performance degradation which can be in the form of a loss of the inherent frequency diversity order or reduced coding gain. This paper demonstrates that the minimum mean-square error symbol-by-symbol linear equalizer incurs no diversity loss compared to the maximum likelihood receivers. In particular, for a channel with memory $\nu$, it achieves the full diversity order of ($\nu+1$) while the zero-forcing symbol-by-symbol linear equalizer always achieves a diversity order of one.

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