Robust hybrid beamforming is developed for millimeter wave multiple-input multiple-output (MIMO) systems. The channel state information (CSI) with correlated estimation errors is used for averaging the mutual information formulation. It is proved that the robust hybrid beamforming scheme can be solved via an Euclidean distance minimization problem as the design with the perfect CSI assumption. An alternating method is proposed to solve the hybrid processors with closed-form least-square solutions in each iteration. Simulation results show that the proposed beamforming scheme prevails existing hybrid beamforming designs.

中文翻译：

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具有封闭形式最小二乘解的毫米波系统中稳健的混合波束成形

稳健的混合波束成形是为毫米波多输入多输出 (MIMO) 系统开发的。具有相关估计误差的信道状态信息 (CSI) 用于平均互信息公式。证明了鲁棒混合波束形成方案可以通过欧几里德距离最小化问题作为具有完美CSI假设的设计来解决。提出了一种交替方法来在每次迭代中使用封闭形式的最小二乘解来求解混合处理器。仿真结果表明，所提出的波束成形方案优于现有的混合波束成形设计。