Research And Application Of Radio Propagation Model Calibration Based On LTE System

The rapid development of mobile communication network has a profound impact on people’s work and life. LTE is during the peak period of application, the quality of its network construction directly affect the user experience and the interest of communication operators.Radio propagation model is an important method and the premise of wireless network planning.The classical propagation models are universal, but the prediction for the specific communication environment is not accurate enough. Therefore, it is necessary to calibrate the propagation model. Only combined the propagation model with the landscape features of the specific areas can ensure the accuracy of the simulation and prediction of the single of service coverage area, which provide an important reference for the optimization of the network.In this paper, combined with the LTE network planning project of a metropolis in China, the research and application of radio propagation model calibration based on LTE system were carried out on the basis of the classic outdoor propagation models and the current calibration algorithms. Firstly, the MATLAB software is used to simulate several kinds of outdoor macro cell models. By comparing and analyzing the results, the basic model of propagation model calibration of LTE system was confirmed. Furthermore, on the basis of the research of artificial neural network and PSO algorithm, the PSO-BP algorithm could be applied to calibrate the propagation model of LTE system, and the process of realization for PSO-BP algorithm in the propagation model calibration of LTE system was given. Finally, based on the CW measurement data of three different kinds of areas, the model was calibrated on the wireless programming software platform. Compared with data before and after propagation model calibration used PSO-BP algorithm, then the error were statistical analyzed and graph of error distribution was obtained, which verified the feasibility and superiority of the PSO-BP algorithm in the radio propagation model calibration based on LTE system.