Abstract
The performance of filter bank multicarrier offset quadrature-amplitude modulation systems is known to be limited by intrinsic interference in highly frequency-selective radio propagation conditions. In this article, a novel adaptive multiple-input–multiple-output (MIMO) filter bank multicarrier transmission system in time-division duplex mode is analyzed in which filter bank-based interference power is considered in the bit loading (BL) and automatic modulation classification (AMC) algorithm. In order to reduce the amount of intrinsic interference, a filter design for a general multitap MIMO channel equalization is elaborated. For this linear MIMO receiver technique, an analytical expression of the signal-to-interference-and-noise power ratio after equalization is described. Since BL and AMC rely on the information about the subcarrier link quality, the influence of residual interference on its performance in a MIMO setup is quantified. For a wireless local area network similar propagation scenario, incorporating the information about the interference power in the BL and AMC method results in a significant system performance improvement at high signal-to-noise power ratios.
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