The X3D propagation model and ray-tracing algorithm were used to system modeling and simulation for the ambient electromagnetic environment of communication base station near Beijing Municipal Institute of Labor Protection. The simulation results were in agreement with the field measurement results through comparative analysis, which verified that the propagation model and algorithm are scientific, practical, and effective. The propagation model and algorithm can effectively overcome the

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... ions that empirical model cannot adapt to the complex building model in different urban, and other deterministic model cannot accurately find the propagation path. Introduction With the advances in communication technology and improvements in people living standard, the telecommunication industry has been developing rapidly. In order to ensure the maximum communication quality and data transfer speed in densely populated areas, telecommunication operators have continuously installed communication base stations in urban area. Some of these base stations are set on rooftops of residential buildings, which have resulted in increasingly higher levels of electromagnetic radiation in the environment [1]. Many residents have concerned that the ambient electromagnetic radiation of communication base stations would affect the human health [2,3]. Therefore, a systematic investigation into the issue is very important. At present, the electromagnetic radiation research for communication base stations mainly focuses on the impact of electromagnetic radiation of communication base stations on the surrounding environments [4, 5] , electromagnetic radiation distribution of base stations [6, 7] , and algorithms of base stations [8, 9] . However, the contrast research of field measurement and simulation of electromagnetic radiation for communication base station in urban is rare. Based on the uniform theory of diffraction (UTD), we adopted the X3D propagation model and ray-tracing algorithm to model and simulate the ambient electromagnetic environment of communication base station near Beijing Municipal Institute of Labor Protection, and studied the vertical distribution of electromagnetic radiation field of base station. Through comparative analysis of field measurement results and simulation results, we proved the practicality and effectiveness of the model and algorithm. Studies on the effects of electromagnetic radiation of base stations on the surrounding environments play a positive role in alleviating public fear, and play an important guiding role in base station construction.