Patent Number: 7,821,454

Title: Systems and methods for detecting GPS measurement errors

Abstract: Systems and methods for detecting global positioning system (GPS) measurement errors are provided. In this regard, a representative system, among others, includes a navigation device that is configured to receive GPS signals from signal sources, the navigation device being configured to calculate pseudoranges (PRs) and delta ranges (DRs) based on the received GPS signals, the navigation device including a consistency check algorithm that is configured to: determine mismatches between the respective calculated PRs and DRs, and indicate that an error exists in the respective calculated PRs and DRs based on their mismatch and mismatch accumulations. This algorithm can be independent of navigation state and is capable of detecting slow-changing errors.

Inventors: Xie; Gang (Fullerton, CA), Chansarkar; Mangesh (Irvine, CA), Liao; Daniel (Irvine, CA), Lin; Xiangdong (Irvine, CA)

Assignee: SiRF Technology, Inc.

International Classification: G01S 19/20 (20100101); G01S 19/22 (20100101); G01S 19/21 (20100101)

Expiration Date: 2018-10-26 0:00:00