Correction And Application Of Chengdu Mobile TD-LTE Wireless Propagation Model

As the large-scale construction of TD-LTE network goes on,China's mobile communication network has entered the LTE era.Compared with 2G or 3G mobile communication networks,4G networks need to use higher frequency band(2.6GHz)for wireless transmission.High-band 4G network coverage is significantly lower than the current network 2G or 3G network,but the traditional propagation model planning Far cannot meet the needs of 4G network planning.In this context,TD-LTE network planning draws more and more attention,but the propagation model is one of the important factors of wireless network planning and a direct impact on the accuracy of network planning.Therefore,in order to guarantee the validity and rationality of the investment in the project construction,the network propagation model should be corrected at the initial stage of the network construction to provide more accurate prediction results and lay a good foundation for the follow-up network optimization work.In this thesis,first study and analyze the propagation mode of radio waves in wireless environment,and then analyze the influence of various factors such as the speed of mobile travelling,the environment of communication,the types of services and the distribution of users.Several propagation models are currently used in wireless network planning.Based on the analysis and understanding of the propagation model correction technique,the design of the verification and correction scheme is carried out in combination with the actual environment,and the calibration method and the calibration result are validated.Finally,the simulation model of different scenarios is simulated by using the ANPOP,and the simulation results agree well with the actual test environment model by analyzing the simulated forecast data and the actual road test data.Finally,the calibration results are applied to the real project.The simulation software can predict the data accurately and accurately.There are various practical problems such as over-coverage,weak coverage,overlapping coverage,high interference and low rate,which can effectively and accurately guide the current network planning and optimization,and improve the efficiency of subsequent network optimization.