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:
Mar. 28, 2023
Filed:
Feb. 01, 2022
Amazon Technologies, Inc., Seattle, WA (US);
Amit Kachroo, San Jose, CA (US);
Durga Laxmi Narayana Swamy Inti, San Jose, CA (US);
Ravi Ichapurapu, Morgan Hill, CA (US);
Amazon Technologies, Inc., Seattle, WA (US);
Abstract
Technologies directed to channel state information (CSI) sending in the 2.4 GHz band are described. A method includes receiving first CSI data representing channel properties of a wireless channel used by first and wireless devices that operates in the 2.4 GHz band. The method generates CSI samples at a first sampling rate. If the method determines that a first value, representing quality of the CSI samples, satisfies a threshold criterion, the method generates second CIS samples at a second higher sampling rate while alternating between each of multiple wireless channels in the specified amount of time. The method determines a score for each channel subcarrier index of a set of channel subcarrier indexes using the second CSI samples and identifies a subset based on the score. Using the second CSI samples corresponding to the subset, the method determines a motion condition or a no-motion condition within a geographical region.