一种新的基于子连接结构的混合预编码算法

doi:10.11896/jsjkx.210300138

计算机科学 ›› 2022, Vol. 49 ›› Issue (5): 256-261.doi: 10.11896/jsjkx.210300138

一种新的基于子连接结构的混合预编码算法

蒋锐^1,2, 徐姗姗^1,2, 徐友云²

1 南京邮电大学通信与信息工程学院南京210003
2 南京邮电大学通信与网络技术国家工程研究中心南京210003

收稿日期:2021-03-12 修回日期:2021-07-20 出版日期:2022-05-15 发布日期:2022-05-06
通讯作者: 蒋锐(j_ray@njupt.edu.cn)
基金资助:
国家重点研发计划(2016YFE0200200);国家自然科学基金(61801240);南京邮电大学研究项目(NY220008)

New Hybrid Precoding Algorithm Based on Sub-connected Structure

JIANG Rui^1,2, XU Shan-shan^1,2, XU You-yun²

1 College of Telecommunications and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China
2 National Engineering Research Center for Communication and Network Technology,Nanjing University of Posts and Telecommunications,Nanjing 210003,China

Received:2021-03-12 Revised:2021-07-20 Online:2022-05-15 Published:2022-05-06
About author:JIANG Rui,born in 1985,Ph.D,asso-ciate professor.His main research interests include radar signal processing and mobile communication system.
Supported by:
National Key Research and Development Program of China(2016YFE0200200),National Natural Science Foundation of China(61801240) and Research Project of Nanjing University of Posts and Telecommunications(NY220008).

摘要/Abstract

摘要： 毫米波通信是5G网络的关键技术,因为它可以提供较高数量级的频谱,但它具有更大的路损,采用大规模天线阵列和定向波束成形技术可以有效解决这一问题。随着天线数量的增加,传统数字预编码器的硬件和能量成本非常高,需采用混合预编码来克服这一困难,但全连接结构中该算法的功耗较高,因此提出了一种新的基于子连接结构的混合预编码算法。该算法首先将发射天线阵列分为几个独立的子阵列;然后分别对每个子阵列的模拟预编码矩阵进行设计,并依次优化每个子阵列的频谱效率,以最大限度地提高总频谱效率;最后,在求得的模拟预编码矩阵的基础上,利用最小二乘法求解数字预编码矩阵。仿真结果显示,该算法的频谱效率与正交匹配追踪算法相差不超过3bps/Hz,但能量效率最多可提高23.8%;与功率迭代算法相比,该算法的频谱效率更高,且能量效率可提高4%左右。因此,所提算法具有很好的实际应用价值。

关键词: 大规模MIMO, 混合预编码, 能量效率, 频谱效率, 子连接

Abstract: Millimeter wave communication can provide higher spectrum,so that it’s the key technology of 5G network,but it will also have greater road loss.Large scale antenna array and directional beamforming technology can solve this problem effectively.However,with the increase of the number of antennas,the cost of hardware and energy of traditional digital precoder is very high,so hybrid precoder is needed to overcome this difficulty.However,the power consumption of the algorithm is high in the fully-connected structure.Therefore,a new hybrid precoding algorithm based on sub-connected structure is proposed in this paper.Firstly,the transmit antenna array is divided into several independent sub-arrays,then the analog precoding matrix of each sub-array is designed,and the spectral efficiency of each sub-array is optimized in turn to maximize the total spectral efficiency.Finally,based on the obtained analog precoding matrix,the digital precoding matrix is solved by the least square method.Simulation results show that compared with the orthogonal matching pursuit algorithm,the difference between the two algorithms is no more than 3bps/Hz,but the energy efficiency can be improved by 23.8%.Compared with the power iterative algorithm,the spectral efficiency of the proposed algorithm is higher,and the energy efficiency can be improved by 4%.Therefore,the proposed algorithm has good practical application value.

Key words: Energy consumption, Hybrid precoding, Large scale MIMO, Spectrum efficiency, Sub-connected

中图分类号:

TN928

蒋锐, 徐姗姗, 徐友云. 一种新的基于子连接结构的混合预编码算法[J]. 计算机科学, 2022, 49(5): 256-261. https://doi.org/10.11896/jsjkx.210300138

JIANG Rui, XU Shan-shan, XU You-yun. New Hybrid Precoding Algorithm Based on Sub-connected Structure[J]. Computer Science, 2022, 49(5): 256-261. https://doi.org/10.11896/jsjkx.210300138

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一种新的基于子连接结构的混合预编码算法

New Hybrid Precoding Algorithm Based on Sub-connected Structure

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