Patent · US Active

Position and time determination under weak signal conditions

US7567208B2 · kind B2 · utility

4Cited by
8References
28Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJun 29, 2007
Grant dateJul 28, 2009
Priority date—
Expiry dateJun 29, 2027

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01S19/42
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

Described herein are systems and methods that are capable of determining receiver position and system time under weak signal conditions. When the receiver is unable to accurately determine the satellite signal travel time, e.g., due to weak signal reception or some other condition, the receiver can still estimate the pseudo-range for the satellite based on an initial receiver position and system time. In this case, the system and methods described herein provide the necessary initial receiver position and system time with enough accuracy to estimate the pseudo-range, even under weak signal conditions. The receiver can then use the estimated pseudo-range to determine a more accurate receiver position.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.