Spread Spectrum Communication And Application On Power System

Spread spectrum communication is paid more attention to the advantage of good message privacy, antijamming and mutiple access in the world, it shows strong vitality on the side of measuring distance, antenna measure, mine communication, tactics communication, muti-access application, mobile communication and so on. Power line is most widely network, so using theexisting power line to communicate can save most invest of line. But there is much disturb and cacophony on power line, using commonly communication's mode is difficult to attain reliability's demand. But using spread spectrum communication on power line can attain reliability's demand.In this paper, chapter 1 introduce firstly the characteristic of signal transferring on power line, and design communication's process and mode using spread spectrum communication achieve automatic meter reading's data transferring system using power line as communication's media. Chapter 2 explain the base of mathematics, the mode of system, the principle of communication and the principle of PN code, and go along analysis of mathematics. Chapter 3 discuss the modem technology and synchronization of direct sequence spread spectrum system (the design in this paper also use this system). Chapter 4 set forth the communication's circuit and debugging of power line automatic meter reading's data transferring system. Chapter 5 draw a conclusion of the circuit, then table a proposal.