多用户MIMO双向中继信道鲁棒预编码

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。

Robust relay pre-coding for multiuser MIMO Two-way relay systems

In multiuser MIMO two-way relay systems, multiple pairs of users exchange information through a common relay node equipped with multiple antennas. If we use the non-ideal channel model, the CSI information collected at the relay may not be perfect, then it will degrade the system performance significantly. So in this paper, we propose the robust linear pre-coding which to maximize the minimum worst-case signal-to-interference-plus-noise-ratio of multiple pairs of users subject to a total relay power budget. Simulation results show that the proposed scheme not only achieves the high worst-case signal-to-interference-plus-noise-ratio but also improve the system performance of bit error rate efficiently.