随机桥方法研究超宽带无线信道

该文使用随机桥方法研究超宽带室内多径信道。首先介绍随机桥理论，分析UWB室内多径信道的物理基础；然后对UWB脉冲信号失真问题和脉冲信号的相位问题进行深入分析。把UWB信号在信道中发生的传播损耗和与散射体发生碰撞产生的损耗分开，假设UWB多径信号的传播路径为布朗桥过程，同时采用双值相位假设，得到布朗桥模型信道冲激响应。对有金属网格玻璃门反射的走廊环境进行仿真，得到的UWB信道功率时延分布与公布的UWB信道测量结果一致。

Applications of Stochastic Bridge Methods for UWB Wireless Channel

The stochastic bridge methods are employed in the current research for the modeling of UWB indoor multipath channel. Stochastic bridge processes are first introduced, and a physical fundament of UWB indoor multipath channel is analyzed. Then the distortion and the phase distribution of an UWB signal are investigated in details. A Brownian Bridge Model (BBM) for UWB indoor multipath channel is obtained by dividing the energy loss of an UWB signal into two parts: the propagation loss and the reflection loss, treating the UWB indoor multipaths as Brownian bridge process, and adopting two phase assumptions. Using the channel model to simulate a corridor environment of two glass doors with a metal grid inside, several characteristic parameters of UWB indoor multipath channel, such as amplitude responses, reflection index of every mulitipath, and power delay profiles (PDPs), are obtained, which are similar to the results from other experiments.