Introduction to Space-Time Wireless Communications
Introduction to Space-Time Wireless Communications
On downlink beamforming with greedy user selection: performance analysis and a simple new algorithm
IEEE Transactions on Signal Processing - Part I
On the achievable throughput of a multiantenna Gaussian broadcast channel
IEEE Transactions on Information Theory
Duality, achievable rates, and sum-rate capacity of Gaussian MIMO broadcast channels
IEEE Transactions on Information Theory
On the capacity of MIMO broadcast channels with partial side information
IEEE Transactions on Information Theory
On the optimality of multiantenna broadcast scheduling using zero-forcing beamforming
IEEE Journal on Selected Areas in Communications
Performance Analysis of Scheduling in Multiuser MIMO Systems with Zero-Forcing Receivers
IEEE Journal on Selected Areas in Communications
Scheduling for multiuser MIMO broadcast systems: transmit or receive beamforming?
IEEE Transactions on Wireless Communications
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In this paper, we investigate the impact of imperfect feedback on the multi-user multi-input multi-output (MU-MIMO) broadcast systems. We consider the MU-MIMO system with either zero-forcing (ZF)-based transmit beamforming or receive beamforming. By analysis and simulations, we find that if the effects of feedback channel variations are taken into account, the receive ZF MIMO broadcast system can have higher sum rate than the transmit ZF MIMO broadcast system. The transmit ZF scheduler outperforms the receive ZF scheduler at the cost of feedback bandwidth and perfect channel state information.