矩阵随机过程在短程无线信道空时特性建模中的应用

使用矩阵随机过程对短程无线信道的空时特性进行研究。以随机矩阵的列向量描述信道的仰角自由度,行向量描述信道的水平角自由度。使用自由布朗桥过程产生的样本描述无线信道中的多径分量的传播轨迹,在一定的映射规则下可以得到反映无线信道空时特性冲激响应的传统模型和矩阵随机过程模型。对无线信道的空时特性进行了仿真分析,仿真结果表明,自由布朗桥过程所描述的完全随机的约束环境中,多径分量的波达方向在仰角和水平角维度上显示出一定的局部偏好性。

Applications of Matrix Stochastic Processes for Modeling Space - Time Characteristics of Short RangeWireless Propagation Channels

Matrix stochastic processes are employed to model the characteristics of short range wireless propagation channels in the current research.The freedom degrees of elevation and azimuth of multipath components(MPCs) are described by the column vectors and raw vectors of random matrix,respectively.Free Brownian bridge processes are used to model the propagation trajectories of MPCs in wireless channel,from which the conventional channel impulse response model and the model based on matrix stochastic processes can be obtained after introducing the specified mapping rules.Simulation analysis for space-time characteristics in some environment is carried out.The simulation results demonstrate that the direction-of-arrival of MPCs described by the elevation and the azimuth are slightly locally favorable in the completely random propagation environment.