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The 46 papers focusing on the theme of "Theories and Methods for Advanced Wireless Relays" have been divided into two groups to be published in two separate issues. This first issue includes 23 papers on relay performance bound, MIMO relay beamforming, relay channel estimation, two-way and shared relays, full-duplex relays, and security for relay networks. The second issue includes papers...
In this paper a multi-input multi-output (MIMO) communication system is considered in which a relay with multiple antennas is used to assist the data transmission from the source to destination. We assume that the relay applies a linear transform matrix on its received signal vector and retransmit the transformed vector to the destination node. We optimize the transform matrix by maximizing the average...
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