Wireless Communication Fading Channel Modeling And Its Application In Wireless Channel Simulator

With the increase of human demand for wireless communication,wireless communication technology has been rapidly constituted.Since the first generation of mobile communication system(1G)was developed,the fourth generation of wireless mobile communication(4G)started to emerge and develop rapidly till now,the demand of mankind for wireless communication is higher and higher,and the communication design system is more and more complicated.In the design of communication system,it is impossible for every kind of real and varied actual environment to do the test.Therefore,the increasing importance of wireless communication channel modeling and simulation in the R&D and testing of modern wireless communication devices has been a key issue for research.The main contents of this paper are as follows:First,we have analyzed and compared of the calculation method of the Doppler coefficient and discrete Doppler frequency parameters in the typical deterministic process model:Isometric method(MED),mean square error(MSEM)and the equal area method(MEA),Monte Carlo method(MCM)and the precision of Doppler expansion method(MEDS),and the Doppler coefficient method for the Zheng model has also been studied and analyzed.In order to improve the statistical characteristics of fading channels,we introduce multipath factor p into the arrival angle(AOA)of Monte Carlo method(MCM),and propose two improved MCM Rayleigh fading models.Secondly,we analyzed and simulated the channel model parameters AOA,multipath factor p,low frequency oscillator number N and mean square error(MSE).Compared with the original MCM Rayleigh fading model,the two new models have a great improvement in the accuracy of auto correlation statistical properties and inter correlation statistical properties respectively.According to the simulation data,,when the implementation overhead is under the same circumstances,the mean square error(MSE)of the auto-correlation function is about 1/4 of the original MES and the accuracy of cross-correlation function is improved about 1/2.Finally,for high speed wireless communication system,the paper introduced the theoretical analysis of high speed wireless system,the architecture of the model and the architecture of hardware design.And the software simulation platform for channel model is given.The improved Monte Carlo channel model is applied to the simulation platform.The non-correlation of each channel is analyzed,which extends the modeling method of the wireless communication channel.