混合动态连接结构的多用户多流混合预编码

赵峰; 何晓华

doi:10.11999/JEIT200441

混合动态连接结构的多用户多流混合预编码

doi: 10.11999/JEIT200441

赵峰,
何晓华^,

桂林电子科技大学信息与通信学院桂林 541004

基金项目: 国家自然科学基金(61871466)

详细信息

作者简介:
赵峰：男，1974年生，研究员，博士生导师，研究方向为MIMO无线通信网络

何晓华：女，1995年生，硕士生，研究方向为大规模MIMO无线通信系统

通讯作者:
何晓华　xiaohua_he@163.com

中图分类号: TN929.5
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- 文章访问数: 1135
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- 被引次数: 0
出版历程
- 收稿日期: 2020-06-03
- 修回日期: 2021-07-21
- 网络出版日期: 2021-08-12
- 刊出日期: 2021-09-16

Multi-user Multi-stream Hybrid Precoding with Hybrid Dynamic Connection Structure

Feng ZHAO,
Xiaohua HE^,

School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China

Funds: The National Natural Science Foundation of China (61871466)

摘要

摘要: 混合预编码对于提高多用户毫米波大规模多输入多输出(MIMO)系统的性能至关重要，但目前基于全连接结构与子连接结构的混合预编码分别存在高能耗与性能损失严重的问题。该文综合考虑系统的频谱效率与能量效率，提出混合动态连接结构，并设计该结构下的混合预编码算法。该算法通过最大化信干噪比(SINR)的增量来设计混合动态连接结构的模拟域预编码，然后基于等效信道运用块对角化(BD)设计数字域预编码抑制多用户多流干扰。仿真实验表明，该文所提出的混合动态连接结构的频谱效率介于全连接结构与混合固定连接结构之间且获得的能量效率最高。
- 大规模MIMO /
- 毫米波 /
- 混合预编码 /
- 混合动态连接结构
Abstract: Hybrid precoding is essential to improve the performance of multi-user millimeter-wave massive Multiple Input Multiple Output (MIMO) systems, but currently hybrid precoding based on fully connected structures and sub-connected structures have the problems of high energy consumption and severe performance loss, respectively. This paper comprehensively considers the spectral efficiency and energy efficiency of the system, proposes hybrid dynamic connection structure, and designs hybrid precoding algorithm under the structure. In this algorithm, the analog domain precoding of the hybrid dynamic connection structure is designed by maximizing the increment of Signal-to-Interference-plus-Noise Ratio (SINR), and then the digital domain precoding is designed by Block Diagonalization (BD) to suppress multi-user multi-stream interference through an equivalent channel. Simulation experiments show that the spectral efficiency of the proposed hybrid dynamic connection structure is between the spectral efficiency of the fully connected structure and the spectral efficiency of the hybrid fixed connection structure, but the highest energy efficiency is obtained.
- Massive MIMO /
- Millimeter wave /
- Hybrid precoding /
- Hybrid dynamic connection structure

HTML全文

图 1 混合动态连接结构

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图 2 不同结构下的频谱效率对比图

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图 3 不同天线数目的频谱效率对比图

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图 4 射频链路数对频谱效率的影响对比图

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图 5 射频链路数对能量效率的影响对比图

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表 1 混合动态连接结构的多用户多流模拟域预编码设计算法

输入：$ {\boldsymbol{F}} $，${N_{\rm{t}}}$，$ {N_{\rm{RF}}} $，$ N $，$ K $
输出：$ {{\boldsymbol{F}}_{\rm{RF}}} $
初始化：${\boldsymbol{S} } = {\rm{zeros} }\left( { {N_{\rm{RF} } } } \right)$
for n=1:N_t
for k=1:K 　　　　　$ {\rm{SINR} }\left[ { { {\boldsymbol{S} }_k}{\text{ = } }{\boldsymbol{B} } } \right] = \frac{ {\dfrac{P}{ {K{N_{\rm{u} } } } }\left\\| { { { {\tilde{\boldsymbol h} } }_k}{\boldsymbol{F} }{ {\boldsymbol{S} }_k} } \right\\|_{\rm{F} }^2} }{ { {\delta ^{2} } + \dfrac{P}{ {K{N_{\rm{u} } } } }\displaystyle\sum\nolimits_{j \ne m} {\left\\| { { { {\tilde{\boldsymbol h} } }_k}{\boldsymbol{F} }{ {\boldsymbol{S} }_j} } \right\\|_{\rm{F} }^2} } } $
${\rm{SINR} }\left[ { { {\boldsymbol{S} }_k}{\text{ = } }{\boldsymbol{A} } } \right] = \frac{ {\dfrac{P}{ {K{N_{\rm{u}}} } }\left\\| { { { {\tilde{\boldsymbol h} } }_k}{\boldsymbol{F} }{ {\boldsymbol{S} }_k} } \right\\|_{\rm{F} }^2} }{ { {\delta ^{2} } + \dfrac{P}{ {K{N_{\rm{u}}} } }\displaystyle\sum\nolimits_{j \ne m} {\left\\| { { { {\tilde{\boldsymbol h} } }_k}{\boldsymbol{F} }{ {\boldsymbol{S} }_j} } \right\\|_{\rm{F} }^2} } }$
end
$ {\nabla _k} = {\rm{SINR}}\left[ {{{\boldsymbol{S}}_k}\left( {n,:} \right) = {\boldsymbol{A}}} \right] - {\rm{SINR}}\left[ {{{\boldsymbol{S}}_k}\left( {n,:} \right) = {\boldsymbol{B}}} \right] $
${\boldsymbol{S}}_k^ * {\text{ = } }\mathop {\arg \max }\limits_{ { {\boldsymbol{S} }_k} } {\nabla _k}$
$ {\boldsymbol{S}}\left( {n,N\left( {k - 1} \right) + 1} \right) = {\boldsymbol{S}}_k^ * $
end
$ {{\boldsymbol{F}}_{\rm{RF}}} = {\boldsymbol{FS}} $

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参考文献(19)

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