A Recent study about data communication through existing power lines has been the subject interest of research for many researchers for over the past decade. Many researchers and industries have tried to develop and produce some devices to cover the disadvantages of using power line as data communication. This is because the power line is designed for transmission of power instead of signal transmitting originally. The heterogeneous structure of the power line network with numerous branches and impedance mismatches causing reflections and attenuation during signal transmission, and thus communication signal cannot be sent out or received completely. Furthermore, when the data communication trespassing the transformer, the disturbance, attenuation and degrading of signal become more severe. Orthogonal Frequency Division Multiplexing (OFDM) as one of the latest modulation and demodulation technique is used to achieve better digital data transmission over a limited bandwidth.
This thesis serves as an investigation of the characteristics of Power Line Communication through Transformer with the presentation of a comprehensive and detailed analysis of the standards, mathematical modeling for PLC through Transformer, the latest modulation and demodulation technique used, and the behavior of PLC through Transformer based on the simulations and test results.
The main aim of this research is to design a comprehensive idea about power line communication through transformer in order to propose and examine a novel approach in comparing the different modulation order, different modulation type, and also application of different noise types and applying them to the two modeled channels, Additive White Gaussian Noise (AWGN) and Powerline modeled channel. This is an attempt to understand and recognize the most suitable technique for the transmission of message or image within a communication system. In doing so, MATLAB and embedded Digital Signal Processing (DSP) and Communication systems are used to simulate the operation of virtual transmitter and receiver.