Method and apparatus for navigation data downloads from weak...

Details Method and apparatus for navigation data downloads from weak... Method and apparatus for navigation data downloads from weak...

2006-11-10

2009-06-09

Tarcza, Thomas H (Department: 3662)

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

Directive

Including a satellite

C342S357490, C342S357490, C375S316000

Reexamination Certificate

active

07545317

ABSTRACT:
The present invention provides systems and methods that enable a standalone receiver capable of downloading navigation data under weak signal conditions. In an embodiment, a standalone navigation receiver generates predicted satellite orbits based on the tracking history of the satellites stored in the receiver. The tracking history comprises historical navigation data previously received from the satellites. The receiver uses the predicted satellite orbit to generate navigation data such as ephemeris and almanac. Since the predicted satellite is accurate, the generated navigation data is similar to the navigation data transmitted by the navigation satellites, and can therefore be used by the receiver to correct the downloaded navigation data bits. Thus many of the bits of a downloaded navigation word, especially the higher order significant bits of the word can be corrected. The remaining bit errors can be resolved based on a parity check of the word.

REFERENCES:
patent: 5323322 (1994-06-01), Mueller et al.
patent: 5587716 (1996-12-01), Sheyublat
patent: 5731787 (1998-03-01), Sheyublat
patent: 5768319 (1998-06-01), Durboraw, III
patent: 5870426 (1999-02-01), Yokev et al.
patent: 6150978 (2000-11-01), McBurney
patent: 6515620 (2003-02-01), Jandrell
patent: 7057553 (2006-06-01), Jandrell
patent: 2001/0004761 (2001-06-01), Zehavi
patent: 2003/0016167 (2003-01-01), Dooley et al.
patent: 2003/0226096 (2003-12-01), Shen et al.
patent: 2005/0099334 (2005-05-01), Roh
patent: 2007/0152878 (2007-07-01), Wang et al.
patent: 2007/0177729 (2007-08-01), Reznik et al.

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