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Relay communication network has been widely studied in recent years due to their ability to provide more reliable communication through enhanced diversity. In this work, we consider a downlink multiuser multi-input-multi-output (MU-MIMO) relay network under amplify and forward (AF) protocol. Coordinated relay system can provide the additional diversity gain due to adding the relay station (RS) compared...
The technologies of Multiple Input Multiple Output (MIMO) in relay protocols are considered as one of the most promising candidates for next generation wireless communication systems to extend cell coverage and enhance system capacity. However, since a relay station (RS) cannot transmit and receive a signal simultaneously when RS operates in half duplex mode, spectral efficiency of the system is deteriorated...
The downlink minimum bit error rate (MBER) transmit beamforming is directly derived based on the uplink MBER receive beamforming for time division duplex (TDD) space-division multiple-access (SDMA) multiple-input multiple-output systems, where the base station (BS) is equipped with multiple antennas to support multiple single-antenna mobile terminals (MTs). It is shown that the relationship between...
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