Patent ID: 8179312
Filing Date: 2012-05-15
Classification: G01S

Abstract:
1. A method of performing navigation in attenuated or jammed environments, the method comprising: detecting a frame structure of a first signal received from a first satellite; aligning a clock of a receiver unit to the detected frame structure; generating a set of time estimates respectively separated according to the frame structure, wherein at least one of a predetermined number of the time estimates is aligned to a second signal of a second satellite, wherein the set of generated time estimates is bounded by the predetermined number; providing the time estimates to system correlators of the receiver unit; aligning the system correlators according to the time estimates; identifying the at least one of the time estimates that is aligned to the second signal of the second satellite, wherein the at least one of the time estimates provides aiding information to the receiver unit; and using the at least one time estimate to detect the second signal of the second satellite.