| Emerged in the early1920s, Power Line Communication technology whoseshorthand is PLC is a way of communication to achieve data transfer and informationexchange though the transmission medium of low-voltage distribution network.Power lines are everywhere, whether in urban, rural, or remote and backward areas.Where there will be as long as the electricity power lines exist. Without layingadditional lines of communication, it is greatly reduce the communication cost totransfer data and voice signals. In the field of the intelligent building and intelligentcommunity, using power transmission lines as common platform for telephone,computer, television and power transmission networks will have a very bright future.Compared with other access methods, using PLC technology has its incomparablesuperiority on select in the field of the intelligent building and intelligent community,so most of companies invariably choose it as the preferred communication method. Indata communication, there are a lot of implementation methods such as wirelesscommunications, infrared, optical fiber, coaxial cable, twisted pair, etc. But there aremany practical problems. People generally do not want to punch through walls, andthe cost of wireless communications is very high which people do not want to pay theextra burden. Based on the above, the research of the power line communicationtechnology is very necessary and practical. In the21st century, with the developmentand progress of modulation techniques, PLC technology has been rapid development,the use of power lines to achieve high-speed Internet access and multimediamessaging has become a current research focus.The kernels of this paper is the research of power-line communication modemand implementation residential community of users of broadband with the220V/380V voltage power lines.The main work of this paper includes the following aspects:1At first, the paper introduces power line carrier communication briefly, thenaccording to the communication characteristics and goals, the paper discusses andestablishes the design of Power-line Ethernet Adapter. Second, the paper presents andanalyzes the technical difficulties of implementation process, and analyzes the characteristics of the low-voltage power line carrier communication channel;2Compared and analysed several power line communication modulation modes,the paper chooses OFDM(Orthogonal Frequency Division Multiplexing)as themodulation mode which is introduced in detail in this paper. According to themodulation mode and chip performance comparison, the paper chooses INT6400asPLC chip;3Combined with the characteristics of ethernet, the paper gives the overalldesign of the whole system. Complete the design of power line carrier Ethernetadapter and each functional module. In order to achieve a more efficient system to200Mbps high-speed broadband access, the paper added band-pass filter and anethernet adapter in the system. |
