射频失配下分布式大规模MIMO的性能分析

doi:10.3969/j.issn.0255-8297.2018.06.003

应用科学学报 ›› 2018, Vol. 36 ›› Issue (6): 904-913.doi: 10.3969/j.issn.0255-8297.2018.06.003

射频失配下分布式大规模MIMO的性能分析

文犇犇, 柳涛, 王郝

南京航空航天大学电子信息工程学院, 南京 211106

收稿日期:2017-06-16 修回日期:2018-03-10 出版日期:2018-12-31 发布日期:2018-12-31
通信作者: 柳涛,硕导,研究方向:通信与信息系统、无线信号处理等,E-mail:liutaonuaa@163.com E-mail:liutaonuaa@163.com
基金资助:
国家自然科学基金（No.61601220）资助

Performance Analysis of Distributed Massive MIMO Systems under RF Mismatch

WEN Ben-ben, LIU Tao, WANG Hao

College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

Received:2017-06-16 Revised:2018-03-10 Online:2018-12-31 Published:2018-12-31

摘要/Abstract

摘要： 分析了分布式大规模多输入多输出（multiple-input multiple-output，MIMO）系统在射频（radio frequency，RF）链路失配情况下的性能，基于性能分析和最大比传输（maxratio transmission，MRT）原理，推导了系统下行链路可达速率的闭式表达式.仿真结果表明，该表达式可有效评估基站端（base station，BS）射频失配情况下的系统性能.基站端超过1 dB的幅度失配或π/2的相位失配，都将导致用户端有超过50%的下行速率损失.射频失配对系统性能的影响十分严重，也说明了对射频失配进行性能分析的必要性.

关键词: 时分双工, 分布式大规模MIMO, 射频失配, 性能分析

Abstract: The performance analysis of the distributed massive multiple-input multipleoutput (MIMO) system under the mismatch of the radio frequency (RF) circuits is studied. Based on the performance analysis and the principle of max ratio transmission (MRT), a closed-form expression of achievable downlink rate is derived. The result of simulation validates that the RF mismatch on base station (BS) can be well evaluated with this expression. If the amplitude variance of RF gain is more than 1 dB or the phase of RF mismatch is more than π/2 on BS, the maximum of the achievable downlink rate loss of users is ffty percent larger than a system with ideal RF. The system performance is seriously affected by the RF mismatch, which verifes that the performance analysis for the RF mismatch is indispensable.

Key words: distributed massive MIMO, RF mismatch, time-division duplex, performance analysis

中图分类号:

TN929.5

文犇犇, 柳涛, 王郝. 射频失配下分布式大规模MIMO的性能分析[J]. 应用科学学报, 2018, 36(6): 904-913.

WEN Ben-ben, LIU Tao, WANG Hao. Performance Analysis of Distributed Massive MIMO Systems under RF Mismatch[J]. Journal of Applied Sciences, 2018, 36(6): 904-913.

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射频失配下分布式大规模MIMO的性能分析

Performance Analysis of Distributed Massive MIMO Systems under RF Mismatch

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