Abstract
Radio access at mm-waves has been subject of intensive research in the latest years. However, within the initial deployment of 5G, mm-waves are still relegated and there is a generalized idea that the mm-wave channel for radio access, in comparison to the sub-6 GHz channel, is not only sparse but also troublesome for outdoor applications. In the present paper we introduce simultaneous multi-band measurements comparing the sub-6 GHz with the mm-waves channel at 30 GHz and 60 GHz in street canyon scenarios using the same measurement equipment in Germany and Japan. An analysis on the propagation and radio channel characteristics shows that the mm-waves channel offers similar opportunities as the sub-6 GHz. Consequently, the challenge relies on the design of an adequate radio interface matching the channel characteristics. In that regard, aspects as the location of clusters and spatial consistency gain importance within geometry-based stochastic channel models (GBSCMs). The analysis of the large-scale parameters (LSPs) has shown a large influence of the geometry of the scenario on the channel, encouraging the introduction of deterministic modelling components within GBSCMs targeting these scenarios.
Highlights
The large blocks of free spectrum available at mm-waves make these frequency bands very suitable to provide the necessary bandwidths to meet the requirements of future wireless technologies [1]
Since polarization is not addressed in this work, unless otherwise is indicated, the absolute squared values of the samples are summed over all the polarizations
In the following sub-sections we investigate the presence and relevance of ground reflection (GR) and other side reflection (SR) that can be predicted in the measurements from the geometry of the scenario
Summary
The large blocks of free spectrum available at mm-waves make these frequency bands very suitable to provide the necessary bandwidths to meet the requirements of future wireless technologies [1]. Dupleich et al.: Multi-Band Propagation and Radio Channel Characterization in Street Canyon Scenarios for 5G and Beyond to the digital interface [9] This results in high directive radio channels with the need of adaptive beam-forming and tracking in mobile environments. We compare propagation aspects as scattering in the different bands and scenarios, in order to identify the opportunities that the mm-waves channel offers, using the sub-6 GHz as a reference. The objective is to identify the presence and relevance of deterministic scatterers, showing Their influence in the propagation channel and the limitations of the current system-level based GBSCMs to test tracking and beam-forming applications. We analyse the radiochannel at mm-waves assuming systems aspects as directivity in aligned-LOS (ALOS) and non-aligned-LOS (NALOS)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
