双向HFC网上行传输的技术问题及对策

Technological problems of the bidirectional HFC net in transmiting upwards and corresponding strategies

文章对有线电视双向HFC网上行传输的若干技术问题作了较详细的研究;阐述了双向HFC网传输通道中的特有问题——“汇集干扰”、“汇集均衡”等概念及形成原因,并通过实例分析;提出了解决双向HFC网中信号存在“汇集干扰”、“汇集均衡”等问题的可行性方案及加强有线电视上行通道安全性的措施。

The technological problems of the bidirectional hybrid fiber/coaxial（HFC） net in cable TV transmitting upwards are studied in detail. The concepts and causes of the special problems ,such as collection interference and collection balance, in the passage of the net are described. Feasible plans are put forward to solve these problems that exist in the signals of the bidirectional HFC net ,and security measures to strengthen upward transmission in cable TV are also discussed.