Comparison Of Characteristics Of 13-17 Ghz Propagation Channels In Indoor Environments With Different Measurement Configurations

In this contribution, a channel measurement campaign was carried out which employed directional scanning approach to capture the temporal and spatial characteristics of higher-frequency-band (HFB) wave propagation channel ranging from 13 to 17 GHz in lecture hall environments. The omni-directional antenna was equipped in the transmitter (Tx), and a horn antenna of certain half-power-beamwidth (HPBW) installed in the receiver (Rx) side was rotated during the channel measurements. The Space-Alternating Generalized Expectation-maximization (SAGE) algorithm was utilized to extract the multipath components (MPCs) based on the received signals. Furthermore, a threshold-based clustering approach was adopted to group the MPCs in delay, and angular domains. Moreover, composite and cluster-level channel behaviors and statistics were investigated based on the outputs of the SAGE algorithm and compared among the results for measurements conducted with various configurations. It is noted that the ratio of the antenna HPBW to the rotation step size, denoted as. exerts significant effects on the antenna angular resolution, and thus influences the estimation performance. Additionally, it is observed that with the growth of., delay spread, AoA spread, cluster delay spread, cluster EoA spread and cluster path-loss exponent versus transmission distance have a tendency to decline.