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:
Mar. 16, 2010
Filed:
Apr. 07, 2006
Walter Engevald Lillo, Torrance, CA (US);
Manorama Gollakota Raghavender, Rancho Palos Verdes, CA (US);
John Lukesh, Torrance, CA (US);
Randal Kirk Douglas, Redondo Beach, CA (US);
Walter Engevald Lillo, Torrance, CA (US);
Manorama Gollakota Raghavender, Rancho Palos Verdes, CA (US);
John Lukesh, Torrance, CA (US);
Randal Kirk Douglas, Redondo Beach, CA (US);
The Aerospace Corporation, El Segundo, CA (US);
Abstract
An observation lock detector receives I and Q correlations and measurement residuals and transforms the I and Q quadrature correlation outputs based upon computed code phase and carrier phase into transformed I and Q quadrature signals communicated to conventional output lock detectors to provide validity and confidence indicator signals for indicating that the residual estimates are valid for dynamic propagation of the residuals in a navigation receiver for improved performance especially in low signal-to-noise environments such as for use in an ultratight GPS navigation system.