Apparatus and methods to share time and frequency data...

Details Apparatus and methods to share time and frequency data... Apparatus and methods to share time and frequency data...

2005-04-22

2009-06-09

Tarcza, Thomas H (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

C342S357490, C342S357490, C342S357490

Reexamination Certificate

active

07545316

ABSTRACT:
Methods and apparatus to share time and frequency data between a host processor and a satellite position system (SPS) receiver in a satellite positioning system are disclosed. An example method disclosed herein generates a host processor local time based on a real-time clock associated with the host processor; adjusts the host processor local time to synchronize with a SPS time received from the SPS receiver and to correct a local frequency error of the real-time clock of the host processor; calculates an estimated SPS time based on the adjusted real-time clock signal of the host processor; and attempts to fix a SPS time and a position of the SPS receiver from SPS signals received from a plurality of SPS satellites based on the estimated SPS time.

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