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An extension of stochastic radio channel modeling considering propagation environments with clustered multipath components

机译:考虑集群多径分量传播环境的随机无线电信道建模扩展

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摘要

A novel approach of a parametric stochastic radio channel model describes the dispersive nature of the wave propagation in indoor and outdoor environments with regard to delay and incidence angle. Effects of large-scale fluctuations are considered, too. Channel dispersion is mathematically denoted by the delay-angle spread function which results from the coherent superposition of the contributions arising from a certain number of multipath components (MPC). A classification of the propagation scenarios can be achieved by means of their topological properties. Local parameters defining the instantaneous constellation of the impinging MPC as well as global parameters giving a statistical characterization of the propagation environment (PE) are derived and form the elements of the channel model. This paper focuses on two indoor PE characterized by a line-of-sight (LOS) and a nonline-of-sight (NLOS) connection between the transmitter and receiver, respectively. Measurements in the 24 GHz range (ISM band) are presented to demonstrate the physical properties of the propagation process in both PE and to determine their global parameters. LOS scenarios show "discrete" MPC arising from specular reflections. In case of a NLOS situation the MPC exhibit a clustering pattern due to building and wall structures which can be statistically described by means of a cluster model, an extension of the previously given modeling approach.
机译:参数随机无线电信道模型的新颖方法描述了在室内和室外环境中,关于延迟和入射角,波传播的色散特性。还考虑了大规模波动的影响。信道色散在数学上用延迟角扩展函数表示,该函数是由一定数量的多径分量(MPC)引起的贡献的相干叠加而产生的。传播场景的分类可以通过其拓扑属性来实现。得出定义撞击MPC的瞬时星座图的局部参数以及给出传播环境(PE)统计特性的全局参数,这些参数构成了信道模型的要素。本文重点介绍两个室内PE,它们分别在发送器和接收器之间具有视线(LOS)和非视线(NLOS)连接。提出了在24 GHz范围(ISM频段)内的测量结果,以证明PE中传播过程的物理特性并确定其全局参数。 LOS场景显示由镜面反射产生的“离散” MPC。在NLOS的情况下,MPC由于建筑物和墙壁结构而呈现出聚类模式,可以通过聚类模型(以前提供的建模方法的扩展)进行统计描述。

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