Research On Channel Noise Model For Power Line Communication System In Smart Grid

The smart grid is strong,self-healing,high reliability,good performance and good compatibility with the user interaction advantages of attention at home and abroad.Information and communication technology play a supporting role in the efficient operation,monitoring and protection of smart grid.The power line communication system of intelligent power grid as the research object,using two kinds of noise model of power line channel noise communication.The probability density function of cyclostationary noise model and Middleton class a noise model,obtained two kinds of noise models and their relations in their respective noise model of SNR.OFDM system because of its high spectrum efficiency,strong anti-jamming capability and is widely used in power line communication,but there is also insufficient.In order to solve the traditional OFDM system complexity problem of anti-interference ability problem,proposes a kind of OFDM system based on wavelet transform,the performance of OFDM system with different wavelet based on cyclostationary noise model is analyzed.Finally,it uses MATLAB software simulation results,the cyclostationary noise model SNR is superior to Middleton class a noise model about 2.5d B.And in the three orthogonal wavelet basis,OFDM wavelet Sym error in the cyclostationary noise under the lowest rate based on.