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:
Jun. 15, 2021
Filed:
Feb. 08, 2017
Clarion Co., Ltd., Saitama, JP;
Kazuhiro Okada, Saitama, JP;
CLARION CO., LTD., Saitama, JP;
Abstract
An object is to enable a state of a vehicle to be precisely estimated by a Kalman filter. A navigation systemincludes an observation unitthat observes an observable concerning a variation of the vehicle, based on an output from a sensor, and an estimation unitthat estimates a state quantity indicating a state of the vehicle by a Kalman filter, and the estimation unitcalculates a prediction value of the state quantity of the vehicle, calculates an error covariance matrix of the prediction value, by the Kalman filter to which an error of the observable is inputted as an error of the state quantity which is in a relation of calculus with the observable, and calculates an estimation value of the state quantity of the vehicle and an error covariance matrix of the estimation value by the Kalman filter, based on the prediction value and the error covariance matrix of the prediction value which are calculated.