Electromagnetic Compatibility Research Of Vehicular Communication System Based On Frequency Management

As the development of the vehicle communication technology and radio technology,a large number of communications equipment is installated in the same vehicle.Because of the increasing number of the effects of electromagnetic interference between antennas and Radio is more severe,and the problem between electromagnetic compatibility and frequency management become increasingly evident.In this paper,firstly on-board system,the electromagnetic interference between the antenna is predicted and evaluated,respectively,in two sizes of the frequency analysis and power predict.Interference conditions for electromagnetic compatibility algorithm is advised,forward the characteristics of information.Further,as the theoretical basis of frequency management,co-site communications interference is studied.frequency management methods is proposed for vehicle communication system,and Sinad mold is established for evaluating systems electromagnetic compatibility,and new formula is derived used to calculate security bandwidth in co-site communication systems.Finally,under the guidance of the above-mentioned theory,simulation software is made to calculate security bandwidth,using VC 6.0 and improving the accuracy of the original calculation.Database is established with the use of ACCESS 2003 in order to evaluat systems electromagnetic compatibility and providing a source of data for subsequent analysis and calculations.