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. 19, 2024
Filed:
Jun. 15, 2020
Applicant:
Cisco Technology, Inc., San Jose, CA (US);
Inventors:
Zhigang Gao, Twinsburg, OH (US);
Huaiyi Wang, North Royalton, OH (US);
Assignee:
Cisco Technology, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04W 12/106 (2021.01); H04L 1/00 (2006.01); H04W 12/122 (2021.01); H04W 12/79 (2021.01);
U.S. Cl.
CPC ...
H04W 12/106 (2021.01); H04L 1/0061 (2013.01); H04W 12/122 (2021.01); H04W 12/79 (2021.01);
Abstract
Aspects described herein provide for hardening an RF signature by dynamically utilizing a sending device carrier frequency offset (CFO) as part of the RF signature. The CFO and the CFO varying pattern of wireless devices observed. A radio frequency signature at a sending device is paired to a frequency offset estimation algorithm at a receiving device, the final CFO estimation error may be bounded to a small range for various applications and communication protocols, and utilized to properly identify the sending device at the receiving device.