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Given the optimal transmit beamforming vector, the user who has the worst signal-to-noise ratio (SNR) is referred to as a bottleneck user for a single-group multicasting system with multiple antennas at the transmit side. In this paper, we present some interesting insights into the bottleneck users, such as the maximum number as well as the optimal beamformer when the transmitter has an arbitrary...
Cooperative Receive Diversity (CRD) has been put forward to further improve performance in relay systems. While current studies only consider single antenna configuration in CRD based relay systems, this article introduces multi-antennas for Base Station (BS). A novel Linear Coordinated Precoding (LCP) method is proposed to effectively utilize the spatial diversity and cooperative receive diversity...
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