A suboptimal user selection algorithm for wireless broadcast channels

In downlink broadcast channels, the multiple-antenna base station (BS) often communicates with several users simultaneously. However, the co-channel interference increases as the number of users increases, therefore, BS can not afford too many users. So user selection is necessary. In this paper, we propose a suboptimal user selection algorithm based on signal-to-leakage-noise ratio (SLNR) for the wireless broadcast systems. The property of the proposed user selection algorithm is studied compared with some other selection algorithms in conjunction with the SLNR precoding. Simulation results show that the performance of the proposed algorithm is close to that of the optimal one. For fairness, the impact of scheduling algorithm is also considered.