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This letter considers the relay-assisted multiuser downlink transmission with limited feedback in a wireless cellular network. Taking into account the channel quantization errors, we propose two robust linear beamforming schemes at the relay station based on zero forcing (ZF) criterion and minimum mean square error (MMSE) criterion, respectively. It is noted that the channel direction information...
In this paper, a novel precoding technique is proposed to improve the performance of the MIMO interference channel (MIC). Since the reachable sum-rate is a long-term problem, we present an iterative approach to improve the power-offset and achieve a higher sum-rate than the ordinary scheme. Considering the difference between MIC and multi-input multi-output (MIMO) system, we design joint precoding...
MIMO system has been proven to provide more capacity than conventional SISO system, which is linear increase with the number of minimum transmit and receive antennas. But it is true only in independent conditions, when the spatial fading correlation exists, the capacity may be different. Linear precoder and decoder enable optimal allocation of power and bits over the spatial and temporal domain, depend...
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