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:
Nov. 15, 2022
Filed:
Mar. 27, 2021
Yuqian HU, College Park, MD (US);
Beibei Wang, Clarksville, MD (US);
Chenshu Wu, Hong Kong, CN;
K. J. Ray Liu, Potomac, MD (US);
Oscar Chi-lim AU, San Jose, CA (US);
Yuqian Hu, College Park, MD (US);
Beibei Wang, Clarksville, MD (US);
Chenshu Wu, Hong Kong, CN;
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 wirelessly tracking keystrokes on a surface are described. In one example, a described system comprises: a transmitter configured for transmitting, using a transmit antenna, a first wireless signal through a wireless channel of a venue including the surface; a receiver configured for receiving, using a plurality of receive antennas, a second wireless signal through the wireless channel, wherein the second wireless signal comprises a reflection of the first wireless signal by at least one moving object in the venue; and a processor. The processor is configured for: obtaining, regarding each receive antenna, a time series of channel information (CI) of the wireless channel based on the second wireless signal, detecting at least one keystroke on the surface based on the time series of CI (TSCI) obtained regarding each receive antenna, determining at least one location of the at least one keystroke on the surface, and determining at least one key associated with the at least one keystroke based on the at least one location.