【摘要】 使用Langevin方程构造Langevin桥过程,给出Langevin桥过程的解析表达式,在此基础上可以生成有约束Langevin桥过程。使用Langevin桥过程产生建模无线信道特征参量的基本随机变量,使用仿真方法研究其统计特性。仿真结果表明,在有约束环境中该基本随机变量的概率密度分布显示出明显的局部偏好性。使用由Langevin桥过程构造的基本随机变量研究脉冲无线信道的传播特性。更多还原

【Abstract】 The Langevin bridge process is constructed from the Langevin equation. Its corresponding analytic expression is obtained. The bounded Langevin bridge process can be derived directly from general Langevin bridge process. Basic random variables are constructed from the Langevin bridge processes, which can be used to model parameters of wireless channels. Their statistical characteristics are analyzed from simulations. The simulation results demonstrate that there is locally favorable distribution in the probability density function of the basic random variables in bounded environment. Finally the propagation characteristics of pulse-based wireless channels are analyzed using the basic random variables constructed from the Langevin bridge processes.更多还原