多用户MIMO双向中继信道鲁棒预编码

Robust Relay Pre-coding for Multiuser MIMO Two-way Relay Systems

在多用户MIMO双向中继系统中,若使用非理想信道模型,中继处仅能获得部分下行信道状态信息,这样将导致系统性能大幅度下降。由此提出基于最小信干噪比最大化的鲁棒预编码方案。仿真表明,该方案不仅可以使最差信干噪比最大化,也有效地改善了系统的比特误码率性能。

In muhiuser MIMO two-way relay systems, if the non-ideal channel model is used, the CSI information collected at the relay may not be perfect. Then the system performance is significantly degraded. So in this paper, the robust linear pre-coding which to maximize the minimum worstcase signal-to-interference-plus-noise-ratio of multiple pairs of users subject to a total relay power budget is proposed. Simulation results show that the proposed scheme not only achieves the high worst-case signal-to-interference-plus-noise-ratio, but also improves the system performance of bit error rate efficiently.