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Conference Paper
Measurement-Based Beam Mis-Alignment Analysis of Millimeter-Wave Directional Beamforming in Large Indoor Environments
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- Authors
- Juyul Lee, Myung-Don Kim, Kyung-Won Kim, Jae-Joon Park
- Issue Date
- 2018-04
- Citation
- European Conference on Antennas and Propagation (EuCAP) 2018, pp.1-5
- Publisher
- IET
- Language
- English
- Type
- Conference Paper
- Abstract
- 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 Keywords
- 38 GHz, Directional Antenna, High Gain, Indoor environment, Propagation loss, Small angle, antenna radiation pattern, measurement-based, millimeter wave(mmWave), mis-alignment, multipath propagation environment