毫米波MIMO系统中迭代最小均方误差混合波束成形算法

发布时间：2018-08-18 08:55

【摘要】：混合波束成形结构能有效解决毫米波MIMO系统中射频链路受限的问题,但要设计性能较优的混合波束成形算法仍然存在困难。为了实现更高的频谱利用率,提出了一种性能较优的迭代最小均方误差(Alt-MMSE)混合波束成形算法。该算法利用数字矩阵的正交特性,首先进行初始数字矩阵设计,然后通过最小化发送信号与接收信号的均方误差不断迭代更新数字矩阵,在每一次迭代过程中,通过更新后的数字矩阵得到模拟矩阵的相位信息。仿真结果表明,与OMP混合波束成形算法和基于矩阵分解的混合处理方案相比,该算法具有更优的性能且更接近于纯数字波束成形。
[Abstract]:Hybrid beamforming structure can effectively solve the problem of RF link limitation in millimeter-wave MIMO systems, but it is still difficult to design a hybrid beamforming algorithm with better performance. In order to achieve higher spectral efficiency, an iterative minimum mean square error (Alt-MMSE) hybrid beamforming algorithm with better performance is proposed. Based on the orthogonal characteristic of the digital matrix, the algorithm first designs the initial digital matrix, and then updates the digital matrix iteratively by minimizing the mean square error between the transmitted and received signals. The phase information of the analog matrix is obtained by the updated digital matrix. The simulation results show that compared with the OMP hybrid beamforming algorithm and the hybrid processing scheme based on matrix decomposition, the proposed algorithm has better performance and is closer to pure digital beamforming.
【作者单位】：重庆邮电大学通信与信息工程学院;重庆邮电大学新一代宽带移动通信重点实验室;
【基金】：国家科技重大专项基金资助项目(No.2016ZX03002010-003)~~
【分类号】：TN919.3

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