MIMO下行链路联合波束成形稳健性设计

针对MIMO下行链路中的发射/接收波束成行器,提出了一种对非精确CSI稳健的联合设计方案。方案采用的设计准则是在总发射功率受限的条件下最小化系统和MSE。根据此非凸和非线性优化问题的最优解条件,通过交替地计算每个用户的最优解来近似地获得原问题最优解。仿真结果表明,与非稳健性方法相比,该方案能有效地减少非精确CSI引起的性能损失。

Joint robust design of beamforming for downlink of MIMO systems

This paper proposes a joint transmitting and receiving beamformer approach under the condition of imperfect channel state information(CSI) for the downlink of multi-user MIMO systems.This approach makes use of the assumption of the total transmitting power constraint,the objective of the design is to minimize the system-level sum-MSE.According to this non-convex and non-linear optimization problem's optimum solution condition,it approximately obtains the original issue's optimum solution by computing each user's optimum solution iteratively.The simulation results indicate that this method can reduce system performance loss which induced by imperfect CSI effectively,compared to non-robust approaches.