大规模MIMO系统中的混合RZF预编码算法研究

doi:10.16182/j.issn1004731x.joss.201712024

系统仿真学报 ›› 2017, Vol. 29 ›› Issue (12): 3114-3122.doi: 10.16182/j.issn1004731x.joss.201712024

大规模MIMO系统中的混合RZF预编码算法研究

谢斌, 谢舒闽, 刘述睿

江西理工大学信息工程学院,江西赣州 341000

收稿日期:2016-09-14 发布日期:2020-06-06
作者简介:谢斌(1977-),男,江西于都,硕士,副教授,研究方向为大规模MIMO技术等;谢舒闽(1988-),男,江西瑞金,硕士生,研究方向为大规模MIMO技术。
基金资助:
国家自然科学基金(61363076),江西省自然科学基金(20142BAB207020)

Hybrid RZF Precoding Algorithm for Massive MIMO System

Xie Bin, Xie Shumin, Liu Shurui

School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China

Received:2016-09-14 Published:2020-06-06

摘要/Abstract

摘要： 针对多用户大规模MIMO系统采用传统全数字预编码时系统复杂度和实现成本较高的问题,提出了一种模拟和数字相结合的混合RZF预编码。在充分考虑信道噪声、用户间干扰和系统结构的基础上,结合MRT和RZF预编码对模拟部分的预编码矩阵进行分段设计,数字部分则根据生成的优化信道矩阵,采用低维RZF预编码进行处理。通过这种优化设计,大幅度减少了系统所需射频链路的数量,并且降低了数字基带处理部分的维度。仿真结果表明,在有效地降低了系统复杂度和实现成本的基础上,文中所提混合RZF预编码的频谱效率非常接近传统全数字RZF预编码。

关键词: 大规模MIMO, 混合预编码, RZF预编码, 射频链路, 频谱效率

Abstract: In view of the high system complexity and high cost of the multi-user Massive MIMO system based on the traditional full digital precoding, a hybrid analog and digital RZF precoding is proposed. Based on the consideration of the channel noise, the inter-user interference and the system structure, the analog precoding matrix is sectionally designed with the combination of MRT precoding and RZF precoding, and for the digital part, a low dimension RZF precoding is used on the basis of the optimized channel matrix. After the optimization design, both the number of RF chain and the dimension of the digital baseband processing are reduced. According to the simulation results, based on the reduction of system complexity and implementation cost, the spectrum efficiency of the proposed hybrid RZF precoding algorithm is very close to that of the traditional full digital RZF precoding.

Key words: massive MIMO, hybrid precoding, RZF precoding, RF chain, spectrum efficiency

中图分类号:

TN929.5

谢斌, 谢舒闽, 刘述睿. 大规模MIMO系统中的混合RZF预编码算法研究[J]. 系统仿真学报, 2017, 29(12): 3114-3122.

Xie Bin, Xie Shumin, Liu Shurui. Hybrid RZF Precoding Algorithm for Massive MIMO System[J]. Journal of System Simulation, 2017, 29(12): 3114-3122.

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大规模MIMO系统中的混合RZF预编码算法研究

Hybrid RZF Precoding Algorithm for Massive MIMO System

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