基于随机射线的路径损耗模型
Path Loss Models Based on Stochastic Rays
摘要：
本文采用二维渗流格来描述无线传播环境，并采用随机射线来模拟无线电波的运动轨迹。我们首先推导出随机射线在特定空间位置发生一定次数碰撞的概率。考虑了三类具有不同约束条件的随机射线：随机游动的随机射线和具有两个不同反常水平的一般随机射线。随后，我们得到了每类随机射线在非视距条件下无线电波平均接收功率的封闭形式。具体而言，模型参数的确定和晶格结构上的路径损耗的影响进行了研究。通过与实验数据的比较，验证了理论分析的正确性.
英文摘要：
In this paper, two-dimensional percolation lattices are applied to describe wireless propagation environment, and stochastic rays are employed to model the trajectories of radio waves. We first derive the probability that a stochastic ray undergoes certain number of collisions at a specific spatial location. Three classes of stochastic rays with different constraint conditions are considered: stochastic rays of random walks, and generic stochastic rays with two different anomalous levels. Subsequently, we obtain the closed-form formulation of mean received power of radio waves under non line-of-sight conditions for each class of stochastic ray. Specifically, the determination of model parameters and the effects of lattice structures on the path loss are investigated. The theoretical results are validated by comparison with experimental data.
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