The hybrid analog and digital structure of large-scale antenna array offers a good tradeoff between cost and flexibility, which is a promising solution for millimeter-wave (mm-wave) system. This letter proposes a novel hybrid precoder (HP) design with an iterative beam split and detection algorithm, which works well for sparse mm-wave channels. The proposed strategy can extract the dominant propagation paths by iterative trainings, where the number of dominant paths up to that of radio frequency chains can be detected. The effectiveness and time overhead parameterized by the number of iterations are investigated. The experimental results demonstrated that we can approach optimal HP design with the proposed algorithm with only eight iterations for measured channels, which significantly reduced the complexity compared to the exhaustive search method.

中文翻译：

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具有快速迭代分束和检测算法的毫米波混合预编码器设计


大规模天线阵列的模拟和数字混合结构在成本和灵活性之间提供了良好的权衡，这对于毫米波（mm-wave）系统来说是一种有前途的解决方案。这封信提出了一种新颖的混合预编码器（HP）设计，具有迭代分束和检测算法，非常适用于稀疏毫米波信道。所提出的策略可以通过迭代训练提取主导传播路径，其中可以检测到射频链数量的主导路径。研究了由迭代次数参数化的有效性和时间开销。实验结果表明，我们可以使用所提出的算法对测量通道进行八次迭代来实现最优HP设计，与穷举搜索方法相比，这显着降低了复杂度。