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We study the precoding for the high-rank MIMO in the LTE-A Pro systems. Unlike the low-rank precoding, layer mapping has a relatively large impact on the performance for high-rank precoding. First, we construct a model on the relationship between layer mapping and precoding. Then we derive the system throughput with the resulting model, so that the performance of the layer mapping and precoding can...
Massive MIMO is a promising technique to provide high data rate with good energy efficiency for the future wireless cellular communication. However, its performance benefit often can be realized only when accurate channel state information (CSI) is available at the transmitter to perform accurate beamforming. With large number of antennas, full CSI consumes too much overhead to feed back without compression...
Ultra-dense network deployment is a clear trend considered for the next generation networks. To allow flexible deployment of small cells, self-backhauled small cell architecture is one of the important types of the future ultra-dense network architecture. In this paper, densification and virtualization are considered in both cell and user aspects. Virtualization of radio access network provides a...
Wireless backhaul is often the bottleneck of heterogeneous network with relay nodes especially when dense relay deployment is considered. Massive MIMO is a good candidate to improve the performance of wireless backhaul. With massive MIMO, MU-MIMO technique can be more effectively applied to multiplex transmission targeting multiple relays in the same resource. However, application of MU-MIMO is limited...
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