Utilizing the Spatial Information Provided by Channel Norm Feedback in SDMA Systems
IEEE Transactions on Signal Processing - Part II
On downlink beamforming with greedy user selection: performance analysis and a simple new algorithm
IEEE Transactions on Signal Processing - Part I
User Selection With Zero-Forcing Beamforming Achieves the Asymptotically Optimal Sum Rate
IEEE Transactions on Signal Processing - Part I
Network coordination for spectrally efficient communications in cellular systems
IEEE Wireless Communications
The capacity gain from intercell scheduling in multi-antenna systems
IEEE Transactions on Wireless Communications
Cooperative MIMO-OFDM Cellular System with Soft Handover Between Distributed Base Station Antennas
IEEE Transactions on Wireless Communications
On the optimality of multiantenna broadcast scheduling using zero-forcing beamforming
IEEE Journal on Selected Areas in Communications
Multi-Antenna Downlink Channels with Limited Feedback and User Selection
IEEE Journal on Selected Areas in Communications
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In this paper, we address the problem of user scheduling in downlink coordinated multi-point transmission (CoMP) systems, where multiple users are selected and then served with zero forcing beamformer simultaneously by several cooperative base stations (BSs). To reduce the enormous overhead led by obtaining full channel state information at the transmitter, a low-feedback user scheduling method called channel norm-based user scheduler (NUS), is proposed by exploiting the asymmetric channel feature of CoMP systems. Simulation results show that the channel norm provides sufficient information for user scheduling when each BS has one antenna, where the performance gap between the NUS and the greedy user selection (GUS) is negligible with respect to both the cell average throughput and the cell edge throughput. When each BS has multiple antennas, NUS is inferior to GUS, but still significantly outperforms the uncoordinated systems.