Abstract
Recently, high frequency bands (above 6 GHz) have attracted more attention for the next generation communication systems due to the limited frequency resources below 6 GHz. To reveal the influence of frequency on propagation channels, channel characterization results at 14.6 and 3.6 GHz bands based on measurements in an indoor scenario and in a reverberation chamber are presented. The measurement results indicate minimal differences in path loss exponents, shadow fading standard deviation, root-mean-square (RMS) delay spread and coherence bandwidth for the two frequency bands, while the path loss at 14.6 GHz band is clearly larger than that at the 3.6 GHz band. Furthermore, the underlying factors that influence the channel characteristics are investigated. It is found that the RMS delay spread is independent of the frequency in the scenario where free space propagation and/or reflection are the main mechanisms. Measurements in the reverberation chamber verify this inference.
Highlights
Achieving a high data rate is one of the key challenges for the next-generation wireless communication systems
We presented an analysis of indoor channels for the corridor scenario at
From the comparative analysis for the corridor, we show that the path loss is larger at 14.6 GHz frequency
Summary
Achieving a high data rate is one of the key challenges for the next-generation wireless communication systems. Measurement-based characterization for the corridor scenario at 14.6 GHz is presented. To reveal the influence of frequency on the channel characteristics, characterization for the same scenario at 3.6 GHz is presented. Several papers have provided comparisons between some different frequency bands [8,9,10]. The scenario is different from our work and leads to different results on the frequency dependency for some channel characteristics (for details, see the Comparative Analysis section). A comparative analysis of the channel characteristics between the low and high frequency bands is presented. A detailed insight into the channel characteristics of the path loss, RMS (root-mean-square) delay spread and coherence bandwidth in the corridor scenario with the directional antennas at 3.6 GHz and 14.6 GHz frequency bands is presented.
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