SMARTPHONE-BASED RADAR SYSTEM FOR DETERMINING USER INTENTION IN A LOWER-POWER MODE

摘要

This document describes techniques and systems that enable a smartphone-based radar system for determining user intention in a lower-power mode. The techniques and systems use a radar field (110) to enable the smartphone to accurately determine the presence or absence of a user (112) and further determine the intention of the user to interact with the smartphone (716, 718, 720, 722). Using these techniques, the smartphone can account for the user's nonverbal communication cues to determine and maintain an awareness of users in its environment, and only respond to direct interactions once a user has demonstrated an intention to interact, which preserves battery power. The smartphone may determine the user's intention by recognizing various cues from the user, such as a change in position relative to the smartphone, a change in posture, or by an explicit action, such as a gesture.