Comparative Channel Study of Ray Tracing and Measurement for an Indoor Scenario at 28 GHz

Jinnan Zhan, Jianhua Zhang , Lei Tian, Xinzhuang Zhang, Pan Tang, Jianwu Dou, Hewen Wei
2018 European Conference on Antennas and Propagation
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Abstract: The millimeter wave communication is important for future wireless systems. In this paper, the channel characteristics at 28 GHz in an indoor scenario are researched based on ray tracing (RT) simulation and measurement. In the RT simulation, various configurations, such as different number of reflections, diffractions and penetrations are used. As for the measurement, two setups are implemented in order to analyze more parameters. Setup one is that biconical antennas are used at both the transmitter (TX) and receiver (RX). The other setup is that horn antenna at RX is rotated 360 in azimuth with a step of 5 when an omni-directional antenna located at TX. Meanwhile, antenna is rotated one circle with an elevation angle of 10 , 0 and -10 , respectively. Path loss and K-factor are analyzed firstly, and analysis results indicate the RT result with 1 or 2 reflections, 1 diffractions and 5 penetrations in this conference room is closest to the measurement result and channel models in 3GPP TR 38.901. Then, the root mean square (RMS) delay spread and RMS angular spread are investigated, which shows the value of measurement is a bit larger than RT because of the limitation of azimuth and elevation step. According to all the results, 1-2 reflections, 1 diffraction and 5 penetrations can be used in RT for future analysis of indoor scenario at 28 GHz.


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