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. 23, 2016
Filed:
Aug. 09, 2012
Haitham Zuhair Al-hassanieh, Cambridge, MA (US);
Fadel Adib, Cambridge, MA (US);
Dina Katabi, Cambridge, MA (US);
Piotr Indyk, Cambridge, MA (US);
Haitham Zuhair Al-Hassanieh, Cambridge, MA (US);
Fadel Adib, Cambridge, MA (US);
Dina Katabi, Cambridge, MA (US);
Piotr Indyk, Cambridge, MA (US);
MASSACHUSETTS INSTITUTE OF TECHNOLOGY, Cambridge, MA (US);
Abstract
An offset estimator (e.g., a time delay, a spatial image offset, etc.) makes use of a transform approach (e.g., using Fast Fourier Transforms). The sparse nature of a cross-correlation is exploited by limiting the computation required in either or both of the forward and inverse transforms. For example, only a subset of the transform values (e.g., a regular subsampling of the values) is used. In some examples, an inverse transform yields a time aliased version of the cross-correlation. Further processing then identifies the most likely offset of the original signals by considering offsets that are consistent with the aliased output.