毫米波MIMO系统中迭代最小均方误差混合波束成形算法

doi:10.11959/j.issn.1000-0801.2017205

Abstract

Abstract:

The two-stage hybrid beamforming architecture can solve the problem of limited number of RF chains effectively.However,it is still difficult to design a hybrid beamforming algorithm with better performance.In order to achieve higher spectral efficiency,an alternating minimum mean square error (Alt-MMSE) hybrid beamforming algorithm was proposed.Firstly,the initial digital matrix by using the orthogonal properties of the digital matrix was designed,and then the digital matrix by minimizing the square error of the transmitted signal and the received signal was updated.During each iteration,the phase of the analog matrix could be obtained from the updated digital matrix and the optimal fully digital matrix.The simulation results show that the proposed algorithm has better performance and is closer to fully digital beamforming than OMP hybrid beamforming algorithm and hybrid processing scheme based on matrix decomposition .

Key words: mmWave MIMO, minimum mean square error, hybrid beamforming, RF chain

CLC Number:

TN929.5

Min SHEN,Hao XU,Yun HE,Pengguang ZHOU. Alternating minimum mean square error hybrid beamforming algorithm in mmWave MIMO system[J]. Telecommunications Science, 2017, 33(8): 77-84.

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References 16

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仿真参数	参数内容
发射天线N_t/根	256
接收天线N_r/根	64
天线排布方式	均匀平面阵列
天线间距d /mm	λ/2
群簇数N_cl/个	5
散射体数N_ray/簇	10
AOA，AOD	拉普拉斯分布

Alternating minimum mean square error hybrid beamforming algorithm in mmWave MIMO system

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