Based On The 14.8 GHz High-band Wireless Channel Measurement And Modeling

With the rapid development of wireless mobile communication,mobile data quantity will be exploding in the future.It’s difficult for 3G/4G mobile communication system to deal with this requirement,so that the research of the fifth generation mobile communication system(5G)has begun in recent years.The traditional mobile cellular frequency spectrum resource is such shortage that development and utilization of high frequency becomes urgent and this technology has been seem as one of the focus of the 5G communication technology by more and more researchers.Wireless channel measurement and modeling is vital for communication system design.Therefore,faced with the requirements of future 5G,based on the radio wave propagation theory,reference to domestic and foreign research results,combining theoretical analysis and actual measurement,this article dedicates to the investigation and research of the high frequency wireless channel transmission characteristics.For the research,the paper refers to the related theory knowledge of electromagnetic wave propagation mechanism and the propagation characteristics of wireless channel,investigates the high frequencies related research results both at home and abroad and learns the related knowledge of wireless channel modeling.The automatic measurement platform for the 14.8 GHz wireless channel has been set up referring to the wireless channel measurement platform at home and abroad.In this paper,the time domain measurement system based on PN sequence was employed to measure propagation characteristics of the outdoor environment in campus,the indoor environment of multimedia classroom and the indoor environment of the corridor.The sliding correlation method has been used for processing data combined with floating intercept model and least square method applied to acquire the relationship between the distance and the path loss by which the path loss exponent and the shadow fading standard variance could be achieved as well as the analyses on large scale features of the transmitted signals and the model of wireless channel has been completed.The experimental results show that the 14.8 GHz has good propagation characteristics and high application value in the future 5G communications.