Microsoft Technology Licensing, LLC

Mohammad Mustafa Malik

Jouya Jadidian

Scott Fullam

Alfonsus Dibianto Lunardhi

Rubén Caballero

Muddassar Aslam

Seyedsohrab Madani

To track an object with radar, and achieve greater than range resolution precision, the phase of a difference signal can be utilized and adjusted as the tracked object crosses between resolution ranges. Changes in the object's distance can be detected with greater than range resolution precision by utilizing the phase. Such changes can iteratively inform the determined distance across multiple phase cycles within a single distance range. As the movement of the object approaches, and then crosses, between resolution ranges, the phase as determined within an origin resolution range can be compared with a coincident phase within the destination resolution range and the difference can then be utilized to adjust the phase as the object then remains within the destination resolution range. Such phase adjustments can be applied across multiple resolution ranges, allowing for the tracking of an object, utilizing radar, while achieving greater than range resolution precision.

Radar tracking with greater than range resolution precision

A method for a wearable computing device is presented. The wearable computing device includes one or more radio frequency (RF) antennas that are driven to expose a first body part of a user to an E-field. The first body part of the user located within a threshold distance of the RF antennas when the wearable computing device is worn by the user. Movement of the first body part of the user is determined based on changes in electrical conditions at the RF antennas over time. Movement of a second body part of the user is inferred based on the determined movement of the first body part, the second body part being located outside of the threshold distance of the RF antenna. The first and second body parts are coupled via interconnective tissues. An indication of the inferred movement of the second body part is output.

Inferred body movement using wearable RF antennas

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Snoqualmie, WA, United States of America

Mohammad Mustafa Malik