Channel and Impedance Estimation of Power Line Communication with OFDM

With the advent of new communication technology there are so many development has taken place. Further the media from which the communication data send is so important and the technique used is also very essential part of the technical growth in the line of communication. This thesis introduces a power line communication and the technique used for it. It is media line device and the emerging concept for communication channel and which can be establish easily and use as an existing wire of electricity. It is very interesting approach in establishing last mile broadband access in rural areas. PLC already provides a medium for broadband internet connectivity as well as monitoring control functions for both industries and homes. In general, PLC network is the most expensive network in the world reaching every room. However, it provides an available channel which is hostile when used for communication purposes. This hostility is due to the many problematic characteristics of the PLC from a communications perspective. They include reflections due to impedance mismatch and multipath due to cable joints as well as the different types of noise inherent in the channel. This concept put interest by the impact of impulse noise on the performance of OFDM based PLC system. This thesis presents a design of the PLC model, which is composed of communication model, model of power line and noise model through MATLAB simulation is creating simulative model to evaluate the parameter. For OFDM system, power-lines are modelled like a multipath channel. Noise model is modelled as white noise in addition to the impulsive noise, the mathematics behind the impulse is utilized in an attempt to fully characterize the impulsive noise. The impedance mismatching is considered and, with the channel model, are estimated at the receiver. Different schemes were simulated to compare the bit error rate (BER) for different impulsive noise parameters. Further results indicate that the proposed approach enhances the transmission throughput provides better performance for impulsive noise, and increases the efficiency of the PLC system as a whole.