摘要
DOCSIS 3.1标准的亮点之一是提出了在HFC网络采用4K QAM*调制模式或更高的星座图来提高传输码率。本文将对涉及到的相关技术进行分析,探讨要在HFC网络中实现4K QAM传输,前端系统需要解决哪些实际问题,并提出可行的解决方案。
DOCSIS 3.1 introduces new modulation schemes,among which the most attractive is 4K QAM*or higher constellation.However,to achieve advanced constellations is not easy especially for a proper bit error ratio.How could headend be optimized to make 4K QAM a reality?This paper discusses some related issues of 4K QAM and raised some suggestions on how to address its challenges for headend.
作者
李世元
齐勇
Li Shiyuan;Qi Yong(China Radio&TV Network Co.Ltd.,Beijing 100045,China;China Radio International,Beijing 100040,China)
出处
《广播与电视技术》
2018年第8期80-84,共5页
Radio & TV Broadcast Engineering
