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.
The millimeter-wave frequency band is a promising candidate for future mobile communication in dense environments. The knowledge on the radio channel in outdoor environments is still very limited. In this paper we present measurements that have been performed in a busy urban outdoor environment at 60 GHz together with initial results. A typical small cell deployment scenario was used with static and mobile terminal positions. Human body shadowing events that affect the line-of-sight propagation have also been investigated
The authors have performed 60 GHz wideband channel measurements in Berlin to gain knowledge on millimeter-wave outdoor propagation in dense urban environments. In this paper first results for a street canyon are presented, focusing on path loss analysis of the line-of-sight-dominant small-cell access channel. They reveal that the local area path loss is very close to free-space propagation. Reflected paths do not contribute significantly to the received power as long as the line of sight (LOS) is unobstructed. However, they are usually strong enough to maintain a link if the LOS is blocked. The dominant multipath contributions can also be predicted by ray tracing simulations, though further calibration is needed to accurately determine their strength
A channel sounder for time variant channels is presented. A 60 GHz outdoor measurement campaign was conducted with focus on the properties of ground reflections over large distances up to 1000 m. A two-ray propagation model is introduced and compared to the measurement results in order to derive the ground reflection properties
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