Low Complexity Multiuser MIMO Scheduling with Channel Decomposition

We propose a practical SVD-based scheduling technique for MIMO broadcast channel. Multiuser diversity is exploited by scheduling transmissions simultaneously to a group of users who have the best instantaneous channel quality. In order to avoid the inter-user interference, we use a transmit preprocessing technique which decomposes the multiuser MIMO downlink channel into multiple parallel independent single-user MIMO channels. Simulation results show that the proposed suboptimal multiuser scheduling algorithm achieve almost the same bit error rate performance as the optimal scheduling algorithm.