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A massive multiuser multiple-input–multiple-output (MU-MIMO) system working at millimeter-wave frequencies is a new concept that has appeared in recent years. In such systems, the sparsity of the beamspace channel matrix makes the channel rank reduction and limited feedback realizable. Based on these preferable features, this paper introduces two kinds of beamspace transformation and exploits their...
In this paper, we focus on heterogeneous networks (HetNet) where low-power remote radio head (RRH) nodes are deployed within the coverage area of an existing macro network, aiming at offloading traffic from the macro cell to small cells. To improve the data rate both for users served by macro base stations (BSs) and those by RRH nodes, this paper proposes a joint selection interference control (JSIC)...
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