Abstract
Although the deployment of 5G networks has already started, there are still open questions regarding propagation at millimeter-wave frequency bands. Several propagation campaigns have been carried out at several bands previously identified by regulatory organizations, but due to the wide range of allocated segments of spectrum and the variety of possible propagation scenarios, more measurement campaigns are needed. In this regard, the Universidad Politécnica de Madrid (UPM) has taken millimeter-wave measurements at 26, 32, and 39 GHz bands in an indoor corridor scenario in line-of-sight (LOS) conditions with two antenna configurations (a horn antenna has been used in transmission whereas horn and omnidirectional antennas have been used in reception), and the main results are presented in this paper. The obtained path loss results have been compared with existing millimeter-wave propagation models.
Highlights
Introduction(commonly defined to include the frequency range from 10 to 300 GHz [2])
One of the four main requirements for 5G deployment is the use of millimeter-wave bands [1](commonly defined to include the frequency range from 10 to 300 GHz [2])
The objective of this paper is to present the path loss results at three millimeter-wave frequency bands, namely 26, 32, and 39 GHz, taken in an indoor corridor scenario with LOS condition, to provide the path loss fitting coefficients, and to carry out a statistical analysis of the deviations between the measurement results and the fitted models
Summary
(commonly defined to include the frequency range from 10 to 300 GHz [2]) These bands have traditionally been intended for fixed, backhaul connections, but they may be used to provide mobile network coverage (up to several tenths of meters) in indoor user scenarios. Several countries [7,8] and companies [9] have provisionally identified possible bands to be utilized in the short-, middle-, and long-term. Three of these are the 24.25–27.5 GHz, 31.8–33.4 GHz, and 37–40.5 GHz (hereinafter named as 26, 32, and 39 GHz bands, respectively) [10]. Most of the collected data from past experimental campaigns have served for the development of models oriented to millimeter-wave, Electronics 2020, 9, 1867; doi:10.3390/electronics9111867 www.mdpi.com/journal/electronics
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