摘要
5G的高速率、高吞吐量、高可靠和低时延等特点,要求系统在物理底层不仅要采用高阶基带调制解调技术,还要采用滤波器组技术,以实现3个由3GPP定义的标准应用场景。高阶QAM和F-OFDM的应用,虽然可以部分满足三大应用场景的需要,但也会带来系统性能的下降,必须有其他新技术引入,才可以弥补已有新技术带来的相关缺陷。LDPC编码译码是一个物理底层的,应用于传输末端的,且技术难度适中、技术性能较高的信道编码技术,是以牺牲部分数据传输率换取系统传输可靠性的5G系统不可或缺的基础技术之一。
As 5G has the characteristics of high speed,high throughput,high reliability and low delay,it requires the system not only to adopt high order baseband modulation and demodulation technology,but also filter bank technology to realize 3 standard ap?plication scenarios defined by 3GPP.The application of high order QAM and F-OFDM can partly meet the needs of the 3 appli?cations,in the same time brings down the performance of the system.It is necessary to introduce other new technologies to make up for the related defects of the existing new technologies.LDPC coding and decoding is one of the basic technologies that are applied at the end of the physics,and the technical difficulty is moderate and the technical performance is high.It is al?so one of the essential basic technologies for the 5G system to sacrifice part of the data transmission rate and exchange the reliability of the system.
作者
张长青
Zhang Changqing(China Mobile Group Hunan Co.,Ltd.Yueyang Branch,Yueyang 414000,China)
出处
《邮电设计技术》
2019年第9期51-55,共5页
Designing Techniques of Posts and Telecommunications
