Abstract. The AMR (Auto Meter Reading) is needs to prepare separate IPs and communication lines for remote communication because DCU (Data Concentration Unit) and wideband modem are identical system required the resource to communication. It is the purpose of the literature to improve system stability and data reliability by means of integrating broadband cable communication part and PLC communication part within DCU. A PLC has some draw-backs in wideband communication because of absences of international standard specifications and the characteristic of power line. We integrated broadband cable modem and PLC modem in DCU. Therefore, the communication system is designed with unified board. PLC modem and broadband cable modem are designed to meet ISO/IEC12139-1 and international specified DOCSIS2.0 standard, respectively.

Abstract.A PLC is more sensitive in noise than other wired communication system that is cable, DSL, and optical LAN. Therefore it considered as a crucial point in commercialization of PLC. For the commercialization of PLC, noise reduction and cancelation technique are needed. Therefore, it is definitely required to analyze and interpret the effects and types of the noise, exactly. The purpose of this work is to separate and extract the various noise of power line from data signals.