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학술대회 Measurement-Based Beam Mis-Alignment Analysis of Millimeter-Wave Directional Beamforming in Large Indoor Environments
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이주열, 김명돈, 김경원, 박재준
European Conference on Antennas and Propagation (EuCAP) 2018, pp.1-5
To overcome the considerable propagation loss at millimeter-wave (mmWave) frequencies, which are potential candidate bands for 5G, high-gain directional antennas (or, from a practical sense, with beamforming) are being considered as a key enabling approach. Associated with beamforming, this paper investigates beam mis-alignment loss due to the TX and RX beams are not coaxial based on 28 and 38 GHz measurements collected in multipath-rich large indoor environments such as airport/railway passenger terminals. We observed that the misalignment loss is greatly affected by the surrounding multipath propagation environment (When there is a single path from TX to RX, the antenna radiation pattern will encompass the complete mis-alignment behavior). As with our prior work on outdoor scenarios, a small angle mis-alignment with narrow beamwidth beamforming is responsible for considerable power loss. Combined with standardized propagation models, this suggests a practical power loss guide when beams are mis-aligned with directional beamforming.
KSP 제안 키워드
38 GHz, Directional Antenna, Indoor Environment, Propagation loss, Small angle, antenna radiation pattern, high gain, measurement-based, millimeter wave(mmWave), mis-alignment, multipath propagation environment