说明：  首先分析5G的主要应用场景及技术需求，然后介绍几种面向5G的新型多载波技术，最后对几种技术的优缺 点进行比较，并分析5G各类应用场景下适合采用的多载波技术。
(Firstly, it analyzes the main application scenarios and technical requirements of 5G, then introduces several new multi-carrier technologies for 5G, and finally points out the advantages and disadvantages of several technologies Point comparison, and analysis of 5G under various application scenarios suitable for the use of multi-carrier technology.)