Study On The Propagation Characteristics Of Millimeter Wave Under High Speed Moving

With the advent of the 5G era,the millimeter-wave band has been widely used because of its rich frequency band resources and support for higher transmission rates.However,in high-speed mobile applications such as highways,subways,and high-speed railways,it is still the bottleneck in the development of milimeter wave communication systems.The channel analysis of the application scenario is the first step in the design of the communication system.Therefore,this paper tests and analyzes the tunnel-like corridor scene and the vehicle-to-vehicle high-speed mobile scene for the wideband channel at 41 GHz.The specific work content is as follows:Firstly,this paper summarizes the traditional channel modeling methods,analyzes the five channel modeling and measurement methods in the frequency domain and the time domain,and considers various factors such as cost,complexity and measurement performance.Then the channel measurement method based on the Gray complementary sequence is selected.Then,the measurement scheme is designed in detail for the selected measurement method,including: analysis and development of modules such as channel sounding frame structure,timing coarse synchronization and fine synchronization,channel estimation,and channel data uploading upper computer;Finally,based on the self-designed channel acquisition system,the channel test of the two scenarios for the wideband directional channel at millimeter wave 41 GHz is:tunnel-like corridor scene and vehicle-to-vehicle high-speed scene.Grab the channel impulse response for a period of time and perform subsequent data analysis.The analysis results are divided into two aspects: large-scale fading characteristics and small-scale fading characteristics: combined with the accuracy of actual measurement and the convenience of ray tracing simulation,the large-scale millimeter-wave scales adapted to different transmission and reception height differences in corridor scenes are obtained.Fading model and power pattern for different receiving antenna angles;power delay spectrum for corridor scenes and vehicle-to-vehicle scenes,AIC statistical distribution for small-scale fading,Rice K factor,root mean square delay spread,correlation time,and level A series of small-scale fading parameters such as pass rate and fading duration were analyzed in detail.