使用渗流网格建模无线电波的随机传播环境,在此基础上使用随机射线方法,从概率论的角度得到若干路径损耗的解析公式。经过与经典路径损耗模型以及其他由非波动方法得到的路径损耗模型的比较之后,从逻辑上推断出一个新的路径损耗模型。对新模型中参数的取值范围进行了讨论和分析,最后使用城市密集传播地区的测量数据验证新的路径损耗模型的精确性。 The seepage grid is used to model the stochastic propagation environment of radio waves. Based on this, a stochastic ray method is used to obtain some analytical formulas of path loss from the perspective of probability theory. After comparing with the classical path loss model and other path loss models obtained from the non-fluctuating method, a new path loss model is logically inferred. The range of the parameters in the new model was discussed and analyzed. Finally, the accuracy of the new path loss model was verified by using the measured data in the dense urban area.