Abstract
In order to resist multi-path interference and improve the channel quality in a complex communication environment, link adaptation technique is used in wireless local area network (WLAN). Adaptive modulation and coding scheme (MCS) on the basis of subcarrier or subcarrier cluster in multi-input multi-output orthogonal frequency division multiplexing access (MIMO-OFDMA) communication system is adopted. We can improve the system throughput and greatly save the system spectrum resource by ameliorating adaptive decision algorithm based on the fixed SNR threshold. Based on the adaptive decision algorithm, derive the goodput performance analytically for communication under the distributed coordination function (DCF). Finally, we claim that link adaptation, which includes both subcarrier or subcarrier cluster selection and PHY mode selection, is an attractive way to improve the goodput performance of ultrahigh-speed WLAN.
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