MMSE-Based User Selection Algorithms for Multiuser Linear Precoding

User selection for multiuser linear precoding in broadcast channel is investigated in this paper. Assuming complete knowledge of channel state information at the transmitter, new user selection algorithms are introduced using minimum mean square error criterion. A novel iterative user selection is proposed offering a flexible performance-complexity tradeoff. New algorithms are also developed for orthogonal frequency division multiple access systems. Simulation results show that the proposed methods outperform well-known algorithms, which select users based on users´ orthogonality or sum rate bound.