Abstract
This paper investigates the wideband channel characteristics obtained in a classroom and a hall indoor scenarios at 2-4, 9–11 and 27-29GHz. A virtual uniform circular array (UCA) based channel sounding system was utilized to capture wideband spatial channel characteristics. The propagation parameters of multipath components (MPCs) were estimated by using a high resolution parameter estimation (HRPE) algorithm. The estimated MPCs are further grouped into clusters via a novel clustering identification algorithm based on the KPowerMeans algorithm. The comparison of the composite and cluster-level characteristics at multiple frequency bands in both scenarios is investigated. Moreover, the impact of the indoor room environment, i.e. dimension and furniture, on the propagation channel is also analyzed. The statistics of channel parameters at multiple frequency bands extracted constitute a stochastic clustered spatial channel model.
Highlights
The centimeter-wave and millimeter-wave spectra have been envisioned to support more data traffic and higher system capacity in the fifth generation (5G) communications [1]–[3]
The current work will analyze data measured in the frequency bands of 2-4, 9-11 and 27-29 GHz obtained in a classroom and a hall scenarios using a virtual uniform circular array (UCA) based channel sounding system
It can be observed that the path loss exponent (PLE) at 2729 GHz in the hall scenario is much larger than theoretical PLE (n = 2) in free space, which mismatches the results of the LoS scenarios in [9], [13]–[15]
Summary
The centimeter-wave (cm-wave) and millimeter-wave (mmwave) spectra have been envisioned to support more data traffic and higher system capacity in the fifth generation (5G) communications [1]–[3]. In [19], the authors studied the frequency dependent characteristics at the 5.8, 14.8, and 58.7 GHz bands by a virtual uniform cubic array These works lack the comparison of channel propagation characteristics at multiple frequency bands in different indoor scenarios with the same channel sounding and measurement configuration. The current work will analyze data measured in the frequency bands of 2-4, 9-11 and 27-29 GHz obtained in a classroom and a hall scenarios using a virtual uniform circular array (UCA) based channel sounding system. In [24], four large-scale UCA based measurement campaigns were conducted in various indoor scenarios, including classroom, office, and hall scenarios, at the frequency band 27-29 GHz. The spatial channel characteristics were investigated and compared in the composite level parameters, such as decay factor, delay spread, angular spread and line of sight power ratio.
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