【作者】 扈罗全； 朱洪波；

【Author】 Hu Luoquan, Zhu Hongbo ( School of Communication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing, 210003, China)

【机构】 南京邮电大学通信与信息工程学院；

【摘要】 根据电磁波在无线信道中传播的随机特性,使用随机射线建模电磁波传播。在得到在传播环境中经过若干次反射达到特定位置随机射线的概率分布以后,建立了电磁波传播的概率模型。得到了二维无耗传播情形下平均接收功率的解析表达式,研究了该解析公式的数值特性,分析了其物理意义。当描述随机射线无序程度的参数小于或等于0．5时,随机射线的概率分布有反常行为,使得计算得到的平均接收功率发生发散。当无序程度的参数增大时平均接收功率将降低。更多还原

【Abstract】 According to stochastic characteristics of electromagnetic wave propagating in wireless channels, stochastic rays are employed to model electromagnetic wave propagation. After deriving the probability density function (pdf) that a generic ray undergoes certain number of collisions at a specific spatial location, probabilistic model of electromagnetic wave propagation is constructed. Subsequently, the analytic closed form of mean received power at each location is obtained in a mathematically-rigorous manner in 2-dimensional space lossless propagation. Finally, numerical analysis is presented to discuss the characteristics of the analytic form. When a parameter representing the anomalous level of stochastic rays is less than 0.5, there is abnormal behavior in pdf of stochastic rays, which causes the mean received power to diverge. When the parameter increases, the received power will decrease.更多还原