Analysis And Research On Interference Performance Of Smart Grid Communication System

In recent years,Gaussian channel has been used in various scenes,so the Gaussian channel modeling and communication system design and analysis of communication performance algorithms have become more mature,so when the channel of communication system is designed,the channel interference is generally designed as Gaussian interference.However,in the network environment of interference,there will be pulse interference.In this case,the Gaussian noise model instead of impulsive interference model for system modeling and theoretical analysis will cause deviations from the actual situation.The current interference in the smart grid is generally modeled as interference^[1].Due to Rayleigh multipath propagation in WAN networks,the existing searches rarely give a closed form solution to the performance expression of single carrier and multi-carrier modulation under S?S noise.MR-FSK modulation and MR-OFDM modulation can be used in smart gird standard protocol of smart grid system.When muti-carrier modulation is used,the Rayleigh multipath fading effect can be effectively overcame and thus the performance is improved.Therefore,using MR-OFDM modulation to overcome Rayleigh multipath under S?S interference and bring the performance improvement becomes a key technology.Based on the existing communication about S?S interference,this paper studies the communication performance of WAN network in smart grid in the view of the above problems.Specifically,the main work and innovation of the paper are as follows:1)The S?S channel model is given and analyzed,which is effectively unified with the Gaussian noise channel model and verified by Monte Carlo simulation.2)The closed-loop algorithm of performance analysis using single-carrier modulation is given under the interference of S?S.The algorithm is unified with the performance analysis under Gaussian condition,and the algorithm is verified by Monte Carlo simulation.3)Based on the performance analysis of single carrier under different modulation schemes,a closed-loop algorithm for performance analysis using multi-carrier modulation under S?S interference is given.The algorithm is unified with the performance analysis under Gaussian condition and the algorithm is implemented by Monte Carlo simulation verification.4)Under the interference of S?S,the performance expressions of the signal with integer time offset,frequency offset and different Cyclic Prefix?CP?are deduced,when the performance expressions of the multicarrier modulation schemes is deduced in 3).And the performance of the algorithm is analyzed by Monte Carlo simulation.5)Based on the analysis of the influence of integer time offset,frequency offset and cyclic prefix on the communication performance in 4),the closed-form solution to the performance expression under S?S interference and Rayleigh multipath channel is obtained and the performance of the algorithm is analyzed by Monte Carlo simulation.