Experimental Characterization of Millimeter-Wave Indoor Propagation Channels at 28 GHz

• Published in: IEEE access Vol. 6; pp. 76516 - 76526
• Main Authors: Zhang, Guojin, Saito, Kentaro, Fan, Wei, Cai, Xuesong, Hanpinitsak, Panawit, Takada, Jun-Ichi, Pedersen, Gert Frolund
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01-01-2018; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; angular spread; Antenna measurements; Azimuth; channel sounding; Decay factor; delay spread; Delays; Elevation angle; Frequencies; Frequency measurement; LOS power ratio; Millimeter wave propagation; Millimeter waves; millimeter-wave; Parameter estimation; Performance evaluation; Propagation; Spherical waves; Systems design; Transmitting antennas; Wave propagation; Wireless communication
• ISSN: 2169-3536; 2169-3536
• DOI: 10.1109/ACCESS.2018.2882644

The increasing requirement for the mobile data traffic accelerates the research of millimeterwave (mm-wave) for future wireless systems. Accurate characterization of the mm-wave propagation channel is fundamental and essential for the system design and performance evaluation. In this paper, we conducted measurement campaigns in various indoor scenarios, including classroom, office, and hall scenarios, at the frequency bands of 27-29 GHz. The spatial channel characteristics were recorded by using a large-scale uniform circular array. A high-resolution parameter estimation algorithm was applied to estimate the mm-wave spherical propagation parameters, i.e., the azimuth angle, elevation angle, delay, source distance, and complex amplitude of multipath components. With the same measurement system, the channel parameters including decay factor, delay spread, angular spread, and line of sight power ratio are investigated thoroughly in individual indoor scenarios and compared in different indoor scenarios. Furthermore, the impact of the furniture richness level and indoor geometry on the propagation parameters are also investigated.