This paper presents results of a systematic 2 × 2 MIMO channel measurement campaign, which has been carried out in order to analyze the impact of human body shadowing (HBS) on the 60 GHz wideband channel. A piecewise linear and two analytical models, namely the double knife-edge (DKE) model and a cylinder approach incorporating the uniform theory of diffraction (UTD), are used to approximate and to predict the measurement curves. We propose measures to quantify the degree of match between attenuation curves in the millimeter wave frequency band and use them to evaluate the model results with respect to different scenario groups. The presented results are beneficial to refine existing diffraction models regarding the prediction of HBS effects.
In this paper, we examine millimeter wave propagation in an application-oriented indoor environment by means of broadband channel measurements and ray-tracing simulations. Fundamental issues concerning the choice of simulation parameters are discussed. We investigate the accuracy of ray-tracing predictions in the millimeter wave band with regard to wideband analyses. The results indicate that ray-tracing simulations are useful to predict channel measures like the path loss and the RMS delay spread. However, fundamental differences can be observed by examining the temporal structure of the channel impulse responses and of the spatial fading characteristics which give rise to further analyses
In this paper we investigate the 60 GHz in-car wideband radio channel to assess the feasibility of 60 GHz high bit rate radio communication inside a car. The investigations are based on a measurement campaign comprising different applicationoriented transmission scenarios and propagation conditions. We analyze the channel gain, time dispersion and frequency selectivity. Finally, we derive the achievable signal-to-noise ratio and cover interference aspects.
In this paper we present the implementation of a polarimetric 3D electromagnetical wave propagation simulator utilizing the NVIDIA® OptiX™ ray tracing engine. In order to get a reference for the performance of our simulator we analyze a conference room scenario which has been used for 60 GHz indoor channel analysis before by comparing measured and simulated channels of a different raytracer, called Paray
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