The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 28, 2023
Filed:
Feb. 20, 2021
Sai Deepika Regani, Hyattsville, MD (US);
Chenshu Wu, Hong Kong, CN;
Beibei Wang, Clarksville, MD (US);
Min Wu, Clarksville, MD (US);
K. J. Ray Liu, Potomac, MD (US);
Oscar Chi-lim AU, San Jose, CA (US);
Sai Deepika Regani, Hyattsville, MD (US);
Chenshu Wu, Hong Kong, CN;
Beibei Wang, Clarksville, MD (US);
Min Wu, Clarksville, MD (US);
K. J. Ray Liu, Potomac, MD (US);
Oscar Chi-Lim Au, San Jose, CA (US);
ORIGIN WIRELESS, INC., Greenbelt, MD (US);
Abstract
Methods, apparatus and systems for wireless writing tracking are described. In one example, a described system comprises: a transmitter configured for transmitting a first wireless signal through a wireless multipath channel of a venue; a receiver configured for receiving a second wireless signal through the wireless multipath channel; and a processor. The second wireless signal comprises a reflection of the first wireless signal by a tip of a writing instrument in the venue. The processor is configured for: obtaining a time series of channel information (CI) of the wireless multipath channel based on the second wireless signal, wherein each CI comprises at least one of: a channel state information (CSI), channel impulse response (CIR), channel frequency response (CFR), or received signal strength index (RSSI); and tracking a movement of the tip of the writing instrument based on the time series of CI (TSCI).