Inter-Numerology Interference for Beyond 5G
Inter-Numerology Interference for Beyond 5G
复制标题
超越 5G 的命理学干扰
DOI：
10.1109/access.2019.2946084
复制
发表时间：
2019
期刊：
影响因子：
3.9
通讯作者：
H. Arslan
中科院分区：
文献类型：
--
作者：
Abuu B. Kihero;Muhammad Sohaib J. Solaija;H. Arslan
第五代（5G）无线接入技术（RAT）旨在灵活地服务于具有极其多样化需求的多种业务。朝着实现5G - RAT这一愿景所采取的步骤之一是引入多参数集概念，即具有不同子载波间隔的多种帧结构在一个频段中共存。尽管这种方法在提供所需的灵活性方面是有效的，但它给系统引入了一种新型干扰，称为不同参数集间干扰（INI）。在本研究中，针对多参数集系统的一种新型循环前缀（CP）插入技术（称为公共CP）从INI问题的角度进行了数学分析，并将其与5G多参数集系统标准化的常规CP配置（称为单独CP）进行了广泛比较。根据单独CP和公共CP两种配置，深入讨论了与多参数集系统相关的各种关键问题，例如频域复用、时域符号对齐以及不同参数集的子载波之间的正交性。分析表明，公共CP具有一种优势，即它能够以一种为未来开发更好的避免或最小化INI的技术铺平道路的方式重构系统中的INI模式。
Fifth generation (5G) radio access technology (RAT) is designed to flexibly serve multiple services with extremely diverse requirements. One of the steps taken toward fulfilling this vision of 5G-RAT is the introduction of multi-numerology concept, where multiple frame structures with different subcarrier spacings coexist in one frequency band. Though efficient in providing the required flexibility, this approach introduces a new kind of interference into the system known as inter-numerology interference (INI). In this study, a novel cyclic prefix (CP) insertion technique (referred to as common CP) for multi-numerology system is mathematically analyzed in terms of the INI problem and its extensive comparison with the conventional CP configuration (referred to as individual CP) standardized for the 5G multi-numerology systems is presented. An in-depth discussion of various critical issues concerning multi-numerology system such as frequency domain multiplexing, time domain symbol alignment, and orthogonality between subcarriers of different numerologies is presented in the light of both, individual and common CP configurations. The analyses reveal that common CP has an advantage of restructuring the INI pattern in the system in a manner that paves the way for developing better techniques of avoiding or minimizing INI in the future generations.