Experimental evaluation of digital beamforming for 5G multi-site massive MIMO

Tatsuki Okuyama, S. Suyama, Jun Mashino, Shohei Yoshioka, Y. Okumura, Kenichiro Yamazaki, Daisuke Nose, Y. Maruta
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引用次数: 10

Abstract

In order to tackle rapidly increasing traffic, Massive MIMO using beamforming (BF) is promising technique for fifth-generation (5G) mobile communication systems. Authors have recently proposed the joint processing of digital fixed BF and channel state information (CSI)-based precoding (Digital FBCP) that is suitable for low-SHF-band Massive MIMO. It has been also clarified that Digital FBCP is efficient in not-only single-site but also multi-site environment by introducing extended precoding technique. Although the previous works evaluate only in computer simulations, this paper aims to evaluate real-field performances by using 5G low-SHF-band massive MIMO prototype. First we measure low-SHF-band (5.2 GHz-band) CSI data in outdoor experiment, and then, this paper optimizes beam parameter in computer simulations exploiting the measured data. Finally, we show the throughput performance of Digital FBCP in multi-site environments.
5G多站点大规模MIMO数字波束形成实验评估
为了应对快速增长的通信量,使用波束形成(BF)的大规模MIMO技术是第五代(5G)移动通信系统中很有前途的技术。作者最近提出了一种适用于低高频大规模MIMO的基于信道状态信息(CSI)的预编码(digital FBCP)和数字固定BF的联合处理方法。通过引入扩展预编码技术,明确了数字FBCP不仅在单站点环境中有效,而且在多站点环境中也有效。虽然以前的工作仅在计算机模拟中进行评估,但本文旨在通过5G低高频频段大规模MIMO原型来评估实场性能。首先在室外实验中测量了低高频(5.2 ghz)波段的CSI数据,然后利用实测数据在计算机模拟中优化了波束参数。最后,我们展示了数字FBCP在多站点环境下的吞吐量性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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