Sum capacity, rate distribution and scenarios for multiuser diversity in MIMO-OFDMA
IWCMC '07 Proceedings of the 2007 international conference on Wireless communications and mobile computing
Sum Throughput Enhancements in Quality of Service Constrained Multiuser MIMO OFDM Systems
Wireless Personal Communications: An International Journal
Rate balancing in multiuser MIMO OFDM systems
IEEE Transactions on Communications
Antenna and User Subset Selection in Downlink Multiuser Orthogonal Space-Division Multiplexing
Wireless Personal Communications: An International Journal
Cross-layer analysis of downlink V-BLAST MIMO transmission exploiting multiuser diversity
IEEE Transactions on Wireless Communications
Channel vector quantization for multiuser MIMO systems aiming at maximum sum rate
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
A user grouping method for maximum weighted sum capacity gain
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
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Assuming perfect channel state information at the transmitter of a Gaussian broadcast channel, strategies are investigated on how to assign subchannels in frequency and space domain to each receiver aiming at a maximization of the sum rate transmitted over the channel. For the general sum capacity maximizing solution, which has recently been found, a method is proposed that transforms each of the resulting vector channels into a set of scalar channels. This makes possible to achieve capacity by simply using scalar coding and detection techniques. The high complexity involved in the computation of this optimum solution motivates the introduction of a novel suboptimum zero-forcing allocation strategy that directly results in a set of virtually decoupled scalar channels. Simulation results show that this technique tightly approaches the performance of the optimum solution, i.e., complexity reduction comes at almost no cost in terms of sum capacity. As the optimum solution, the zero-forcing allocation strategy applies to any number of transmit antennas, receive antennas and users