首页> 外国专利> BIDIRECTIONAL AMPLIFIER FOR CABLE AND HFC NETWORK USING UPSTREAM PILOT SIGNAL AND CABLE MODEM OF HFC NETWORK

BIDIRECTIONAL AMPLIFIER FOR CABLE AND HFC NETWORK USING UPSTREAM PILOT SIGNAL AND CABLE MODEM OF HFC NETWORK

机译：使用上游流信号和HFC网络电缆模型的电缆和HFC网络双向放大器

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摘要

PURPOSE: A bidirectional amplifier for cable and HFC(Hybrid Fiber and Coax) network using an upstream pilot signal and a cable modem of an HFC network are provided to perform an automatic gain control for an upstream signal and a downstream signal by using a bidirectional signal. CONSTITUTION: A tuner is connected with a coaxial cable. A saw filter is connected with the tuner. A mixer/AGC(Automatic Gain Control) portion is connected with the saw filter. A downstream demodulator(601) is connected with the mixer/AGC portion. A gain controller controls a gain of a signal of the downstream decoder. A MAC(Medium Access Control) portion(602) receives or transmits signals from or to the downstream demodulator(601). A CPU(604) controls the MAC portion(602) and a terminal. An upstream modulator is connected with the MAC portion(602). A programmable attenuator is connected between the upstream modulator and the tuner. A pilot generator(605) generates a pilot signal. A switch(606) is used for turning on/off the pilot generator.

机译：目的：提供用于使用上行导频信号的电缆和HFC（混合光纤和同轴电缆）网络的双向放大器以及HFC网络的电缆调制解调器，以通过使用双向信号对上行信号和下行信号执行自动增益控制。组成：调谐器通过同轴电缆连接。锯式滤波器与调谐器相连。混频器/ AGC（自动增益控制）部分与锯状滤波器连接。下游解调器（601）与混频器/ AGC部分连接。增益控制器控制下游解码器的信号的增益。 MAC（媒体访问控制）部分（602）从下游解调器（601）接收信号或向下游解调器（601）发送信号。 CPU（604）控制MAC部分（602）和终端。上游调制器与MAC部分（602）连接。可编程衰减器连接在上游调制器和调谐器之间。导频发生器（605）产生导频信号。开关（606）用于接通/断开导频发生器。

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公开/公告号KR100309748B1

专利类型
公开/公告日2001-09-11

原文格式PDF
申请/专利权人 SAMSUNG ELECTRONICS CO. LTD.;
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申请/专利号KR19970074597
发明设计人 JUNG CHUN JAE;
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申请日1997-12-26
分类号H04L7/00;
国家 KR
入库时间 2022-08-22 01:12:02

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