Abstract:

In the multi-user multiple input multiple output（MU-MIMO）system,a base station communicates with multiple users in the same time and spectral resources that results in co-channel interference（CCI）among users.Signal-to-leakage-plus-noise ratio（SLNR）precoding method transforms a joint optimization problem into several independent ones and makes a satisfying tradeoff between system performance and complexity.In this paper,we propose a modified SLNR precoding scheme that takes the effect of interference signal as well as the leakage signal into consideration,and makes iterative optimization of the precoding vectors.Simulation results show that,compared to SLNR method,the proposed method is able to increase system throughput no matter channel state information（CSI）is perfect or not.

Key words: MU-MIMO system, precoding, SLNR method