Experimental Demonstration of Passive Channel Sounding in 28-GHz-band 5G Systems

This paper experimentally investigates passive channel sounding in millimeter-wave (mmWave)-band fifth-generation (5G) mobile communication systems. A mmWave-band base station (BS) generally steers narrow beams, leading to a significant impact on radio propagation channels. Taking advantage of the f...

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Bibliographic Details
Published in:	2024 IEEE 29th Asia Pacific Conference on Communications (APCC) pp. 323 - 327
Main Authors:	Suganuma, Hirofumi, Kuramitsu, Kota, Mitsui, Tsutomu, Matsuda, Takahiro
Format:	Conference Proceeding
Language:	English
Published:	IEEE 05.11.2024
Subjects:	5G mobile communication Base stations Channel estimation Channel state information Fifth-generation (5G) mobile communication systems Frequency-domain analysis Indoor environment Line-of-sight propagation Millimeter wave communication Millimeter wave propagation millimeter-wave (mmWave) communication passive channel sounding Radio propagation radio propagation channel space-alternating generalized expectation-maximization (SAGE) algorithm
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Summary:	This paper experimentally investigates passive channel sounding in millimeter-wave (mmWave)-band fifth-generation (5G) mobile communication systems. A mmWave-band base station (BS) generally steers narrow beams, leading to a significant impact on radio propagation channels. Taking advantage of the fact that the BS transmits channel state information reference signals (CSI-RSs) over the entire band with changing beam patterns, a passive channel sounder estimates multipath component (MPC) parameters for each beam. In addition, the frequency-domain space-alternating generalized expectationmaximization (FD-SAGE) algorithm is employed to analyze the MPC parameters. Passive channel sounding for a commercial 28 GHz -band 5 G BS is experimentally demonstrated in indoor environments. The experimental results reveal the effect of the different BS beams on the radio propagation channel in both line-of-sight (LOS) and non-line-of-sight (NLOS) environments.
DOI:	10.1109/APCC62576.2024.10767986