毫米波大规模MIMO中基于部分连接的混合预编码方案

doi:10.11959/j.issn.1000-0801.2020029

电信科学 ›› 2020, Vol. 36 ›› Issue (2): 35-42.doi: 10.11959/j.issn.1000-0801.2020029

毫米波大规模MIMO中基于部分连接的混合预编码方案

曹海燕,杨晓慧,胡文娟,马子昌,许方敏,方昕

杭州电子科技大学，浙江杭州 310018

修回日期:2020-02-01 出版日期:2020-02-20 发布日期:2020-05-19
作者简介:曹海燕（1975- ），女，博士，杭州电子科技大学副教授，主要研究方向为无线通信系统的信道编码、信号检测、LTE物理层标准等|杨晓慧（1996- ），女，杭州电子科技大学硕士生，主要研究方向为无线通信系统、毫米波大规模MIMO系统中的预编码技术|胡文娟（1994- ），女，杭州电子科技大学硕士生，主要研究方向为无线通信系统、大规模MIMO系统中的能效优化技术|马子昌（1995- ），男，杭州电子科技大学硕士生，主要研究方向为无线通信系统、大规模MIMO系统中的导频分配技术|许方敏（1980- ），女，杭州电子科技大学讲师，主要研究方向为先进移动通信系统及其关键技术，包括干扰抑制策略、无线资源管理策略|方昕（1975- ），女，杭州电子科技大学副教授，主要研究方向为4G、5G移动通信物理层算法
基金资助:
国家自然基金资助项目(61501158)

Hybrid precoding with sub-connected architecture for millimeter wave massive MIMO system

Haiyan CAO,Xiaohui YANG,Wenjuan HU,Zichang MA,Fangmin XU,Xin FANG

Hangzhou Dianzi University,Hangzhou 310018,China

Revised:2020-02-01 Online:2020-02-20 Published:2020-05-19
Supported by:
The National Science Foundation of China(61501158)

摘要/Abstract

摘要：

针对发送端为部分连接、接收端为全数字接收的毫米波大规模MIMO系统，提出了一种采用等效信道的奇异值分解（SVD）设计数字预编码矩阵与数字合并矩阵，并根据模拟预编码矩阵的块对角化特性，以系统可达和速率最大化为目标函数将等效信道分块求得最优模拟预编码矩阵的预编码方案。考虑本方案的硬件成本与功耗问题，在此基础上进一步提出接收端为部分连接的预编码方案，并利用迭代交替更新的方法来求模拟预编码矩阵和模拟合并矩阵。仿真结果表明，接收端采用全数字接收的混合预编码方案相较于基于可持续干扰消除法（SIC）的混合预编码方案性能更优，而接收端采用部分连接的方案虽然性能略低于基于SIC的方案，但功耗与硬件成本大幅度降低。

关键词: 毫米波, 大规模MIMO, 混合预编码, 块对角化

Abstract:

A hybrid precoding scheme in the millimeter wave massive MIMO system was proposed with sub-connected architecture at the transmitter and digital combining at the receiver.In this scheme,the digital precoder and combiner were designed based on the singular value decomposition (SVD) of the equivalent channel matrix,while the optimal analog precoder was obtained by blocking the equivalent channel to maximize spectral efficiency according to the block diagonalization.Considering the hardware cost and power consumption,the precoding scheme with sub-connected architecture at the receiver was further proposed.Otherwise,the analog precoder and combiner were iteratively updated.Simulation results show that the proposed scheme which focuses on the digital combining at the receiver has better performance than successive interference cancelation (SIC)-based hybrid precoding.In addition,though the proposed scheme which focuses on the hybrid combining with sub-connected architecture at the receiver has worse performance than SIC-based hybrid precoding,the power consumption and hardware cost are greatly reduced.

Key words: millimeter wave, massive MIMO, hybrid precoding, block diagonallizatio

中图分类号:

TN929.53

曹海燕,杨晓慧,胡文娟,马子昌,许方敏,方昕. 毫米波大规模MIMO中基于部分连接的混合预编码方案[J]. 电信科学, 2020, 36(2): 35-42.

Haiyan CAO,Xiaohui YANG,Wenjuan HU,Zichang MA,Fangmin XU,Xin FANG. Hybrid precoding with sub-connected architecture for millimeter wave massive MIMO system[J]. Telecommunications Science, 2020, 36(2): 35-42.

图/表 5

参考文献 16

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仿真参数	参数
发射天线数N_t/根	128
接收天线数N_r/根	32
天线排布方式	均匀平面阵列
天线间距d /mm	λ /2
毫米波散射波束数	50
阈值ε	1×10^-4

毫米波大规模MIMO中基于部分连接的混合预编码方案

Hybrid precoding with sub-connected architecture for millimeter wave massive MIMO system

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