Research Of Power Line Simplex Time-sharing Communication Technology

Power line is one of the most extensively distributed networks in the world, it is closely related to our daily lives and constitutes an enormous power net. Power Line Communication technology obtained the rapid development after it was been proposed for the first time,which main driving force comes from the huge market allure of the clever ideas in combing power supply line and communication line.The thesis’s author is independent responsible for the communication module development of a research project in the laboratory team. The team selected the Power Line Communication solution as the means of control system after a variety of contrast, and the communication module is hoped to be used for applications of small scale, low cost and low rate.Aimed at the actual situation of the subject, the thesis proposes a kind of simplex time-sharing Power Line Communication technology on the basis of the principle of Power Line Communication technology related and makes a technical sample machine.Before designing the communication system, the thesis puts forward the principle of power line simplex time-sharing communication technology, including three parts for signal modulation, signal encoding and signal demodulation. According to the principle of three parts, the thesis then carries on the design of technical solutions of each principle module involved in the system, thus, paves the way for the design of software and hardware. In determining the overall technical scheme of the system, the thesis introduces the design of system software and hardware. In the aspect of hardware design, the system is composed of the master node and the slave node, the content of the design can be summarized as four aspects for the microprocessor unit, asynchronous serial communication, the hardware for the master node hardware and slave node. In the aspect of software, this paper introduces the serial port communication, data modulation, data demodulation module design and so on.Finally, the thesis does communication performance testing on the technical sample machine and puts forward corresponding improvement measures according to the test results.