Phase averaging on CSI from commercial 802.11ac devices detects bird motion several meters off LOS in outdoor low-multipath settings while keeping vegetation effects negligible below 3 m/s wind.
Location-based Initial Access for Wireless Power Transfer with Physically Large Arrays
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Geometry-based beamforming delivers 18.75 dB power gain in LoS (0.82 dB below CSI-based) but drops to a 3.83 dB gap in obstructed scenarios with a 41-antenna 920 MHz array.
citing papers explorer
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CSI Phase Averaging for High-Sensitivity Wi-Fi Sensing in Low-Multipath Environments
Phase averaging on CSI from commercial 802.11ac devices detects bird motion several meters off LOS in outdoor low-multipath settings while keeping vegetation effects negligible below 3 m/s wind.
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Experimental Evaluation of Geometry and Reciprocity-Based Beamforming with Large Arrays for RF Wireless Power Transfer
Geometry-based beamforming delivers 18.75 dB power gain in LoS (0.82 dB below CSI-based) but drops to a 3.83 dB gap in obstructed scenarios with a 41-antenna 920 MHz array.