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In this paper, we consider the problem of a robust mean-square-error (MSE) equalizer design for wireless multi-input multi-output (MIMO) communication systems subject to channel matrix uncertainties. Our goal is to find the equalizer minimizing the MSE of the error symbol vectors under the worst channel uncertainty. As we show, the optimal minimax MSE equalizer can be formulated as a solution to a...
Multicarrier code-division multiple access (MC-CDMA) combines multicarrier transmission with direct-sequence (DS) spread spectrum techniques. In this study, several possible channel models of MC-CDMA systems are considered as a multi-state switching Markov process to match the time-varying multipath fading channel. A novel multiple channel estimator, which consists of several possible channel models...
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