《计算机应用研究》|Application Research of Computers

毫米波MIMO系统离散化混合预编码设计

Discrete hybrid precoding design for millimeter wave MIMO systems

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作者 丁青锋,邓玉前,连义翀
机构 华东交通大学 电气与自动化工程学院,南昌 330013
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文章编号 1001-3695(2020)06-045-1826-04
DOI 10.19734/j.issn.1001-3695.2018.12.0896
摘要 为了提高毫米波大规模多输入多输出(MIMO)系统波束成形增益,降低天线与移相器的硬件成本,提出一种基于离散移相器的混合预编码设计方案。以最优化频谱效率为目标,该方案通过分析均匀直线阵列与均匀平面阵列的响应矢量,将毫米波信道的空间特性预编码的设计考虑为空间稀疏重构问题,采用离散化正交匹配追踪原理求出数字预编码与离散化的模拟预编码。仿真结果表明,同等条件下平面阵列的频谱效率优于直线阵列,同时所提出的离散化混合预编码方案中低精度移相器的性能近乎达到全精度移相器的性能增益。
关键词 毫米波; 混合预编码; 离散移相器; 正交匹配追踪; 天线阵列
基金项目 国家自然科学基金资助项目(61961018)
江西省杰出青年人才计划项目(20192BCB23013)
江西省自然科学基金资助项目(20171BAB202001)
江西省研究生创新专项资金资助项目(YC2018-S243)
本文URL http://www.arocmag.com/article/01-2020-06-045.html
英文标题 Discrete hybrid precoding design for millimeter wave MIMO systems
作者英文名 Ding Qingfeng, Deng Yuqian, Lian Yichong
机构英文名 School of Electrical & Automation Engineering,East China Jiaotong University,Nanchang 330013,China
英文摘要 In order to improve the beamforming gain of millimeter-wave massive MIMO system and reduce the hardware cost of antenna and phase shifter, this paper proposed a hybrid precoding design scheme based on discrete phase shifter. Aiming at optimizing spectral efficiency of the system, this scheme considered the spatial characteristic precoding design of millimeter wave channel as spatial sparse reconstruction problem according to the response of uniform linear array and uniform planar array, which used discretized orthogonal matching tracking principle to obtain the digital precoding and discretization of analog precoding. The simulation results show that the spectral efficiency of the planar array is better than that of the linear array under the same conditions. At the same time, the performance of the low-precision phase shifter in the proposed discretization hybrid precoding scheme almost reaches the performance gain of the full-precision phase shifter.
英文关键词 millimeter wave; hybrid precoding; discrete phase shifter; orthogonal matching pursuit; antenna array
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收稿日期 2018/12/5
修回日期 2019/1/21
页码 1826-1829
中图分类号 TN928
文献标志码 A