| 摘要: |
| 为了平衡毫米波大规模多输入多输出系统的性能和硬件开销，降低系统功耗，以频谱效率为优化目标，在部分连接结构下提出了一种收发端联合设计的低复杂度混合波束赋形方案。 首先，基于连续干扰消除将原始优化问题转化为多个子阵的速率优化问题；然后，利用坐标下降法完成模拟波束赋形矩阵设计；最后，引入等效信道矩阵大幅降低矩阵维度，再对其进行奇异值分解获得数字波束赋形矩阵。仿真结果表明，与其他算法相比，所提算法在系统功耗降低的同时保持了较优的性能，且性能逼近部分连接结构的最优方案。 |
| 关键词: 毫米波大规模MIMO 混合波束赋形 坐标下降法(CDM) 连续干扰消除(SIC) |
| DOI：10.20079/j.issn.1001-893x.220620002 |
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| 基金项目:国家自然科学基金资助项目（61701062）；重庆市基础与前沿研究计划项目（cstc2019jcyj-msxmX0079） |
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| A Low-complexity Hybrid Beamforming Scheme Based on SIC-CDM |
| ZHOU Wei,b,HE Fan,b,LIAO Xianping |
| (a.School of Optoelectronics Engineering;b.Chongqing Key Laboratory of Mobile Communications Technology,Chongqing University of Posts and Telecommunications，Chongqing 400065，China) |
| Abstract: |
| In order to balance the performance and hardware overhead of mmWave massive multiple-input multiple-output(MIMO) system,and reduce the power consumption of the system,with selecting spectral efficiency as the optimization target,a low-complexity hybrid beamforming scheme based on joint design of transceiver is proposed in partially connected structure.Firstly,based on the successive interference cancellation(SIC),the original optimization problem is transformed into the rate optimization problem of multiple subarrays.Secondly,the analog beamforming matrices are designed by using the coordinate descent method(CDM).Finally,the equivalent channel matrix is introduced to greatly reduce the dimension of the matrix,and the digital beamforming matrices are obtained by performing singular value decomposition(SVD) on equivalent channel matrix.Simulation results show that,compared with other algorithms,the proposed scheme maintains better performance while reducing the power consumption of the system,and the performance is close to that of the optimal scheme of the partially connected structure. |
| Key words: mmWave massive MIMO hybrid beamforming coordinate descent method(CDM) successive interference cancellation(SIC) |
