一种基于嵌套晶格码的MIMO中继多用户矢量预编码设计

姜华; 焦军彩; 都思丹

doi:10.11999/JEIT210729

一种基于嵌套晶格码的MIMO中继多用户矢量预编码设计

doi: 10.11999/JEIT210729

姜华^{1, 2, ,},
焦军彩²,
都思丹¹

1.
南京大学电子科学与工程学院南京 210023
2.
南京工业大学数理科学学院南京 211816

基金项目: 国家自然科学基金(61702259)，江苏省高校自然科学研究面上项目(17KJB510024)

详细信息

作者简介:
姜华：男，博士后，研究方向为大规模MIMO通信、无线通信中的信号处理、机器学习等

焦军彩：女，副教授，研究方向为信号处理、机器学习等

都思丹：女，博士，教授，博士生导师，主要研究方向为无线通信传输技术

通讯作者:
姜华　hua@nju.edu.cn

中图分类号: TN919.3
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- 被引次数: 0
出版历程
- 收稿日期: 2021-07-19
- 修回日期: 2022-01-17
- 录用日期: 2022-02-15
- 网络出版日期: 2022-02-18
- 刊出日期: 2022-10-19

Vector Precoding Design Based on Nested-lattice-coding for MU-MIMO Relay Systems

JIANG Hua^{1, 2
, ,},
JIAO Juncai²,
DU Sidan¹

1.
Shool of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China
2.
School of Physical and Mathematical Sciences, Nanjing Tech University, Nanjing 211816, China

Funds: The National Natural Science Foundation of China(61702259), The Natural Science Foundation of the Jiangsu Higher Education Institutions of China (17KJB510024)

摘要

摘要: 针对多输入多输出(MIMO)中继多用户系统的多址传输问题，为了提高系统可达速率和误码率性能，该文利用嵌套晶格码具有可达加性高斯白噪声信道容量的特性，设计一种基站和中继联合预编码的方法。基站端的嵌套晶格码结合矢量扰动(VP)预编码，以控制发送信号的功率。由于矢量扰动预编码和嵌套晶格码都存在相同的模运算步骤，因此在中继端的模运算抑制噪声功率的同时消除了冗余矢量。接着实现中继联合迫整数预编码方法，这种基站/中继混合预编码技术能够控制等效噪声功率，实现对蜂窝用户的有效信号传输。更进一步地，在给出整系数矩阵和扰动矢量矩阵的计算方法后，以最大化系统可达速率为目标对基站和中继的功率实现最优分配。实验结果表明，该方案在可达速率和误码性能方面优于现有方案。
- 多输入多输出中继 /
- 多用户 /
- 预编码 /
- 嵌套晶格码
Abstract: This paper focused on the problem of the multi-access transmission in multiuser Multiple-Input Multiple-Output (MIMO) relay systems. In order to improve the performance in terms of system capacity and bit error rate, a joint precoding approach for the base station and the relay station is proposed by exploiting nested lattice coding which is capable of achieving modulo-channel capacity with additive Gaussian noise. At base station, the nested lattice coding is equipped up with Vector Perturbation (VP) precoding, leading to a reduction in transmit power. Since the modulo operation with respect to VP precoding is identical to that in nested coding, the relay can not only depress the noise power but also remove the redundant information with one-step modulo operation. An integer-forcing precoding method is designed for the relay to reduce the equivalent noise. Moreover, the acquisition of both the integral coefficient matrix and the vector perturbation matrix is provided. The transmit power allocation between the base station and the relay is optimized to maximize the system sum rate. The outstanding performance of the proposed scheme is validated by the simulation results.
- Multiple-Input Multiple-Output (MIMO) relays /
- Multiuser /
- Precoding /
- Nested lattice codes

HTML全文

图 1 系统模型

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图 2 嵌套网格

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图 3 基站嵌套格码及矢量预编码处理

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图 4 中继端模运算和转发

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图 5 不同预编码方案的发射总功率与系统和速率的关系

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图 6 不同预编码方案的发射总功率与系统误码率的关系

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