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:
Jul. 05, 2016
Filed:
Nov. 04, 2015
Deere & Company, Moline, IL (US);
Richard G. Keegan, Palos Verdes Estates, CA (US);
DEERE & COMPANY, Moline, IL (US);
Abstract
A first estimator determines a coarse estimate of a time of arrival of at least one subcarrier of an OFDM-like multitone signals by adjusting the coarse estimate of the time of arrival in accordance with a code (first) correlation function. A second estimator determines a precise estimate of the time of arrival of at least one subcarrier of the OFDM-like multitone signals by adjusting the precise time of arrival to align the slope of the subcarrier phases of the OFDM-like multitone signals in accordance with a phase (second) correlation function and consistent with the coarse estimate of the time of arrival associated with the code correlation function. A data processor estimates the location of the receiver or estimated range based on the precise estimate.