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LINK ADAPTATION FOR MIMO-OFDM SYSTEMS USING MAXIMUM LIKELIHOOD DETECTOR

This paper investigates adaptive modulation and coding (AMC) in 2-Tx multiple-input and multiple output (MIMO)orthogonal frequency division multiplexing (OFDM) spatial multiplexing systems using non-iterative maximum likelihood detector (MLD). We derive an approximate postprocessing signal to interference-plus-noise ratio (SINR) for MLD, which is computed as post minimum mean-squared error (MMSE) SINR plus gain value, where the gain value is calculated by symbol error rate of the interfering stream. The post-MLD SINR is then applied to perform link adaptation for AMC. Simulation results show that the proposed link adaptation strategy achieves throughput performance close to that of the optimum approach.