HFC双向网络上行通道噪声分析

Analysis on Noise of HFC Two-way Network Upstream Channel

探讨HFC双向网络上行通道侵入噪声的来源、特性及对策,对499例网络噪声的排查结果进行统计,分析产生噪声的主要因素,结果表明网络施工工艺是产生网络噪声的主要因素,其次为联网用户与客户端产生的干扰。控制HFC双向网络上行通道噪声的方法,首先是要建立施工工艺及上行通道测试标准,其次要建立网络运行监控体系,通过高通滤波器阻断噪声源。

Discuss the sources, properties and countermeasures of the incursive noise on the upstream channel of HFC two-way network. Based on the results of the investigation to the 499 network noise cases, analyze the main factor of the noise generated. Result improved that network construction techniques are the main source of network noise, followed by the interference of clients. According to this draw a conclusion to control the HFC two-way network upstream channel noise, firstly it is to establish standards of construction technique and upstream channel testing, then build up the network operating and monitoring system, blocking noise source through high-pass filter.