Robust Link Adaptation Using SNR-Outage Based Loading for BICM-OFDM

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Executive Summary

In order to increase the data rate or power efficiency of OFDM systems several adaptive strategies to select the power, modulation and even code rate on a per subcarrier basis have been discussed in literature. The underlying assumption of perfect Channel State Information (CSI) at the transmitter, however, is hardly fulfilled in practical systems. Hence, either existing approaches have to be modified to achieve a certain robustness against imperfect CSI or entirely new schemes have to be found. In this paper, the authors will pursue the former and present an extension of the coded bisection algorithm previously presented by the authors to an outage probability based design for enhanced robustness against erroneous CSI.

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