Research And Design Of Lower-voltage Power Line Carrier Network

The lower-voltage power line carrier communication refers to taking the lower-voltage power line distribution network as the transmission medium, realizing the data transmission and the exchange of information as one means of communication.At present the intelligent building, the intelligent community have become the hot spot which the people studies, also will be the future development tendency. Taking the lower-voltage power line as the communication medium of the intelligent community, compared with other means of communication, does not need to lay down the line, and has the high reliability, few investment, quick efficiency and so on .Therefore it has the broad market prospect.Under this background, this article introduces domestically produced power line Modem SC1128 based on direct sequence spread spectrum technology, and in detail introduces the hardware and the software design of power line carrier communication system which takes SC1128 as the core. And aiming at how to realize the self-network, formulates the related network communication agreement.This paper including the following several aspects:(1) Firstly, it introduces basic concept of the power line carrier communication, the present development situation and its application situation, and has thoroughly analyzed own superiority and the existence question of the power line carrier communication technology compared with other communication technologies, and give some methods of solving the questions.It has analyzed the next development direction of the power line carrier communication technology.(2) Afterwards it introduces the power line carrier communication theory, especially the spread spectrum communication theory, the characteristic and so on in detail.(3) It introduces the hardware design of lower-voltage power line carrier module taking SC1128 as the core in detail.(4) It introduces the software communication of lower-voltage power line carrier module, and formulats the communication agreement suited for the family local area network.Finally, a conclusion of paper is made in the end, we also point out the flaw of the system, and presents the orientation of subsequent research work.