UEP Exploitation in MIMO-OFDM with Beamforming and Channel-Correlation Feedback

We investigate the realization of unequal error protection (UEP) using multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM). In our work, we consider different adaptation schemes, a robust and an intuitive bit-loading. We also study the optimum antenna beamforming that utilizes the partially known channel state information (CSI) at the transmitter, such as channel correlation feedback. However, this introduces a wide range of interferences which could be resolved by an equalizer. Our results show that a certain robustness to this interference and a stable performance for high-priority data can be achieved.

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