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根据室内物体对电波的反射和透射的特点，结合射线跟踪法，提出了一种室内物体的分块模型；考虑不同物体介电特性的差别，建立了能存储物体各种参数的数据库；设计了射线跟踪的递归算法，据此计算出室内各处电波传播的路径损耗．对一室内环境进行实地测量，计算结果与测量结果吻合较好．
According to the characteristics of the reflection and transmission of the indoor objects to the radio wave and the combination of the ray tracing method, a kind of block model of the indoor object is proposed. The database which can store various parameters of the object is established by considering the difference of the dielectric properties of different objects. Recursive algorithm for ray tracing, from which the path loss of radio propagation throughout the room is calculated. On-site measurement of an indoor environment, the calculated results are in good agreement with the measured results.