基于低分辨率模数转换的全双工大规模MIMO中继系统频谱效率分析

发布时间：2018-02-27 03:18

本文关键词： 全双工大规模多入多出放大转发中继低分辨率模数转换　出处：《信号处理》2017年06期 　论文类型：期刊论文

【摘要】：为了降低由于大规模基站天线阵列模数转换(analog-to-digital converters,ADCs)所造成的巨大硬件损耗,同时有效地提高系统的能量和频谱效率,基于迫零传输/迫零接收(zero-forcing transmitting/zero-forcing receiving,ZFT/ZFR)预处理方案,文章提出了低分辨率模数转换的多用户全双工大规模多入多出(massive multiple-input multiple-output,massive MIMO)中继系统,基站采用放大转发(amplify-and-forward,AF)协议,并对系统频谱效率进行了分析。文章首先获得了任一用户对频谱效率的闭式表达式,然后分别对三种不同功率缩放方案下系统的频谱效率进行了渐近分析。研究结果表明,当基站天线数量足够大时,三种不同的功率缩放方案对系统的环路干扰和量化误差有不同的影响,且当信源功率固定、基站的传输功率与发送天线数量成反比时,系统能够有效地抑制系统的环路干扰和量化误差,这对低分辨率全双工massive MIMO中继系统的部署具有一定的指导意义。
[Abstract]:In order to reduce the huge hardware loss caused by analog-to-digital converters ADCs of large scale base station antenna array, and to improve the energy and spectrum efficiency of the system effectively, a zero-forcing transmitting/zero-forcing receiving scheme based on zero-forcing transmission / zero-forcing receiver is proposed. In this paper, we propose a multiuser full-duplex, large-scale multi-input and multiple-output (multiple-input) multiple-output (MIMO) relay system with low resolution A / D conversion. The base station adopts Amplify-and-forward AFA protocol. The spectral efficiency of the system is analyzed. Firstly, the closed-form expression of spectrum efficiency for any user is obtained, and then the asymptotic analysis of the spectral efficiency of the system under three different power scaling schemes is carried out. The results show that, When the number of base station antennas is large enough, three different power scaling schemes have different effects on the loop interference and quantization error of the system, and when the source power is fixed, the transmission power of the base station is inversely proportional to the number of transmitting antennas. The system can effectively suppress the loop interference and quantization error of the system, which has certain guiding significance for the deployment of low-resolution full-duplex massive MIMO relay system.
【作者单位】：西北师范大学计算机科学与工程学院;南京邮电大学江苏省无线通信重点实验室;
【基金】：国家973重点基础研究发展计划(2013CB329104) 国家自然科学基金项目(61561043,61261015) 2014年度甘肃省属普通高校基本科研业务费专项资金项目,“面向5G的Massive MIMO毫米波段信道建模及其估计”
【分类号】：TN919.3

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