3GPP 5G NR物理层关键技术综述

Review on Physical Layer Key Technology of 3GPP 5G NR

第五代(5G)移动通信技术被称为新型无线空口,主要满足三大应用场景的通信需求,即增强型移动宽带(eMBB)、超可靠低时延通信(uRLLC)以及海量机器通信(mMTC)。其使用的关键技术包括超精简传输、低时延设计、大规模MIMO以及高低频范围内灵活的频谱使用方式等。根据3GPP TS 38系列的最新技术规范,重点介绍了5G NR层1的关键技术,侧重于与4G LTE的比较,并通过描述5G NR的基本概念,详细解释物理信道和参考信号的设计原理,分享当前5G标准化的最新成果。

The fifth-generation （SG） mobile communication technology is referred as the New Radio （NR） and mainly oriented to three application scenarios： enhanced mobile broadband （eMBB）, ultra-reliable low-latency communication （uRLLC）, and massive machine-type communications （mMTC）. The key technologies include ultra-lean transmission, low-latency design, massive MIMO and spectnun flexibility in high and low frequency bands. According to the latest technical specifications of 3GPP TS 38 series, the key technologies of 5G NR L1 are mainly addressed and compared with 4G LTE. The basic concept of 5G NR is described, the principles of physical channels and reference signals are elaborated in detail, and the latest results about 5G standardization are shared.