Research On Power Line Communication System Based On OFDM Technology

In our ear communication technologe is developing quickly,Power Line Communication (PLC) technology has become the wide band interface techlogy with a bright prospect. It is a communication method make use of low pressure line of the distribution network to transmit high-speed data,voice,image and other mulit-media service signals. With the rapid development of Internet technology,the value of transmitting high-speed data by means of 220V low pressure electricity line has gained people's attention,for it contains some remarkable features such as no wiring,wide covering and easy connection .It is regarded as one of the most competitive technology of wide band network.This thesis introduces the concept and application prospect of power line communication,makes research on the characteristics of power line channel and power line channel model making,and according to the characteristic of power line channel,puts forward a high-speed power line commumication system based on OFDM(orthogonal frequency division multiplexing) technology.In addition, this thesis introduces the principle of OFDM,analyzes the advantages of applying OFDM to power line communication and the key technology of OFDM,establishes power line commumication system simulation based on OFDM technology and makes performance analysis of the system.Finally,this paper explains the functions and uses of power line communication receiving and dispatching chip INT5200 and Ethernet PHY KS8721BL,and based on the above,put forward the geaeral designing plan of PLC modem and the concrete realization method of individual functioning module.