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:
Dec. 29, 2009
Filed:
Mar. 20, 2006
Donald Rasmussen, Fort Wayne, IN (US);
Donald Rasmussen, Fort Wayne, IN (US);
ITT Manufacturing Enterprises, Inc., Wilmington, DE (US);
Abstract
A technique for determining the time of arrival of a signal includes generating a spread spectrum signal with a number of code sectors, each including a periodic sequence of spread spectrum chips that corresponds to a predetermined correlation function. The periodic sequences of chips of the code sectors are shifted in time by differing amounts relative to a periodic time reference. Upon reception, the spread spectrum signal is periodically sampled, and the different code sectors produce different sampling points on the correlation function such that a number of time-shifted correlation functions results from time shifts of the code sectors. The time of arrival of the spread spectrum signal can be determined by curve fitting of the sampling points from the set of time-shifted correlation functions.