Based On The 80GHz Car Link Propagation Characteristics Analysis Of Intelligent Information System

Millimeter wave many such as the advantages of high resolution,strong anti-interference,short wavelength,etc.The features of short wavelength is naturally formed a narrow beam,in the process of target tracking and recognition can have higher resolution [1].Abroad to study and put forward,77-81 GHz for high resolution car use for a long time,the most suitable frequency high resolution for a global unified car radar equipment using the spectrum[2-3],is the ideal choice of the next generation radar sensors,can meet the demand of high level.With the improvement of residents' life quality constantly,road vehicles running into explosive growth,frequent occurrence of traffic accident a problem in the family and society and key.As a focus on sexual problems in the research of intelligent transportation system,communication between vehicles is more and more attention by all of us.Communication between the vehicle terminal can bring many new applications,such as on the strengthening of road traffic safety and reduce traffic new applications [4]to the environment.So how to improve vehicle safety,increase the driver in advance of dangerous information,became the focus of the communication between vehicles in the future,focus and difficulty.In order to improve the 80 GHz frequency band frequency resource utilization,to realize intelligent traffic system,vehicle-mounted radar function is not affected,on the basis of vehicle intelligent information system,by using the spectrum can further increase the safety of the vehicle and provide more services.80 GHz band wireless communication system,with its wide frequency band,strong anti-jamming,good privacy caused wide attention of scholars both at home and abroad,the current researches on the communication system of one of the hot issues.Within the band,however,the wave propagation is influenced by environmental factors,especially theinfluence of rainfall on propagation characteristics is very serious,greatly limits the system can be practical[5].Above all,must be fully mastering 80 GHz frequency radio waves propagation characteristics,thus the correct evaluation of system performance,designed for the system to provide the corresponding solutions to provide basic theory support,in order to improve the reliability of the system.This paper studies 80 GHz frequency vehicle intelligent information system are analyzed under different environmental conditions of radio waves propagation characteristics and impact on the quality of communication.Mainly includes the following sections:1.80 GHz frequency band are susceptible to the influence of the natural environment like rain,fog,snow,dust,etc.,different weather on 80 GHz frequency band will have certain influence.In this paper,based on the existing calculation model,the simulation calculation in certain weather conditions(sunny,fog,snow,dust),to80 GHz frequency attenuation effect.Analysis of several kinds of the size of the influence of environmental factors,it is concluded that under the different characteristics of 80 GHz frequency transmission quality.2.The emphasis was on the effects of rain down to 80 GHz frequency band.According to the ITU-R rain failure prediction model,the simulation analysis of the different rainfall intensity(light rain,moderate rain,heavy rain),and different polarization modes link propagation characteristics.3.On the basis of 80 GHz channel characteristics of vehicle intelligent information system,using the rice distribution statistical model and doppler characteristics of vehicle information system,the simulation analysis of the 80 GHz frequency of rain attenuation,multipath effect,link transmission characteristics of the doppler effect,got80 GHz band vehicle-mounted communication system channel SNR and ber features,for the development and utilization of 80 GHz frequency band to provide basic theory basis.