An intellectual power network for rural areas design

Internet and digital data transmission technologies are now widely used in industrial and agrarian complex. Meanwhile, the laying of dedicated lines for monitoring and management of remote objects in rural areas is not always economically and technically feasible. In this case, it is proposed to use existing power supply lines as a data transmission channel. In the article the modeling of data transmission with the help of Simulink module of Matlab package in conditions of the noise polluted channel is carried out. A generalized scheme of receiving/transmitting information, including a random sequence generator, QPSK modulator and demodulator, forming filters for transmitter and receiver, the counter of bit error probability is developed. To improve the performance of the channel at high noise it is proposed to use modulation by varying the length of the carrier frequency. An Omron microcontroller was used as the software and hardware for the transceiver. With the help of simulation, the characteristics of the communication channel operation were determined. Phase constellation diagrams, signal spectrum analysis and bandwidth at signal/noise parameters: 15 and 50 dB were investigated. The results of simulation modeling showed satisfying results in receiving/transmitting modulated signal.