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Inverse Multipath Fingerprinting for Millimeter Wave V2I Beam Alignment. (arXiv:1705.05942v1 [cs.IT])
来源于:arXiv
Efficient beam alignment is a crucial component in millimeter wave systems
with analog beamforming, especially in fast-changing vehicular settings. This
paper uses the vehicle's position (e.g., available via GPS) to query the
multipath fingerprint database, which provides prior knowledge of potential
pointing directions for reliable beam alignment. The approach is the inverse of
fingerprinting localization, where the measured multipath signature is compared
to the fingerprint database to retrieve the most likely position. The power
loss probability is introduced as a metric to quantify misalignment accuracy
and is used for optimizing candidate beam selection. Two candidate beam
selection methods are derived, where one is a heuristic while the other
minimizes the misalignment probability. The proposed beam alignment is
evaluated using realistic channels generated from a commercial ray-tracing
simulator. Using the generated channels, an extensive investigation is
provided, which includes 查看全文>>