The Key Algorithm Design And Implementation Of The Mobile Channel Moedeling

With the rapid development of mobile Internet, more and more services are displayed with the form of a mobile terminal for us. The development and promotion of the mobile services have brought huge challenges to the wireless network planning. The traditional2G networks have become a bottleneck in the development of the mobile network. To provide the mobile Internet with better network infrastructure,3G networks are deployed massively as well as the commercial trial of LTE and the research and development of LTE-A which is the typical4G network. When we plan and deploy the network or upgrade the current networks, we meet a lot of challenges because of the bad propagation prediction. Therefore we have been focused on the research of deterministic channel modeling which can predict the propagation accurately. Against the problems of ray-tracing, such as high complexity and low operating efficiency, this paper study the problem deeply aiming to improve the efficiency of ray tracing on the demand of company.First, we study the characteristics of the mobile channel and its influencing factors. We got the current channel prediction method and mastered the characteristics of the mature channel modeling. Then we study the ray-tracing channel modeling, research the key algorithm and the acceleration methods, and compare the advantages and disadvantages of every method. This paper calls the AutoCAD interface to obtain the three-dimensional geometric information of the scenario, and complement the missing information which cannot be obtained from the AutoCAD file directly. Now the tetrahedron scenario format can enhance the rate of the channel simulation, but there is no proper division method for the scenario for communication. This paper proposed a tetrahedron division method based on Delaunay and implemented the algorithm with C# language. After the completion of the division, we verify the correctness of the result with variety of methods and describe the problems we met while implementing the algorithm and give the effective solutions to each problem. We propose the ray-tracing algorithm for the tetrahedron scenario format and implemented it with C#language, and verify that this scenario format can be used for propagation prediction effectively. Finally, this paper list the future research directions based on the current research achievements.