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        Joint Channel Estimation and Equalization for MIMO-SCFDE Systems over Doubly Selective Channels

        Zedong Xie,Xihong Chen,Xiaopeng Liu 한국통신학회 2017 Journal of communications and networks Vol.19 No.6

        This paper considers a novel joint channel estimationand equalization (JCEE) algorithm for multiple-input-multipleoutputsingle-carrier frequency-domain-equalization (MIMOSCFDE)system over doubly selective channels for the first time. Given that the doubly selective channels can no longer support theassumption that the channel frequency-domain response remainsinvariant for the duration of one block, most of the channel estimationmethods cannot be applied directly in it. And the lack of theinformation interaction between channel estimation and channelequalization degrades the overall performance. We put forward anoise-eliminated minimum-mean-square-error channel estimation(MMSE-CE) algorithm for the initialization, which is then utilizedfor iterative processing using the ordered successive interferencecancellation (OSIC) technique. Analysis and simulation results validatethe improved performance of the proposed JCEE algorithmfor MIMO-SCFDE systems over doubly selective channels.

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