Empirical validation of energy-neutral operation on wearable devices by MISO beamforming of IEEE 802.11ac

Abstract

We propose an approach to energy-neutral operation by Wi-Fi beamforming for wearable devices to achieve energyneutral operation. We take advantage of the transmit beamforming feature of IEEE 802.11ac's multiple input, single output (MISO) structure to focus the transmit power to improve the transmission distance and the harvested power level. To analyze the WiFi power distribution, we design the system model of an AP's beamforming. To empirically validate our system model, we measure the wireless power of an AP in a variety of distances. Experimental results show that wearable devices with proper sampling rates can achieve an energy-neutral operation.

A Long-Range Directional Wake-Up Radio for Wireless Mobile Networks

“…Several studies have been proposed to optimize beamforming vectors and power configurations [15][16][17][18] for improvement of the information and energy transfer. However, they do not take WuRs into account.…”