Method and apparatus for decoding satellite navigation data...

Details Method and apparatus for decoding satellite navigation data... Method and apparatus for decoding satellite navigation data...

2011-04-12

2011-04-12

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S136000, C375S150000, C375S344000, C375S350000

Reexamination Certificate

active

07924947

ABSTRACT:
Method and apparatus for decoding a bitstream of navigation data broadcast by a satellite positioning system satellite is described. In one example, a portion of a subframe in the navigation data for each of a plurality of occurrences of the subframe in the bitstream is obtained at a satellite signal receiver to produce a respective plurality of subframe portions. The subframe portions are then combined to recover the subframe. The subframe portions may be processed to maintain a constant polarity by comparing a common sequence of data bits among at least two of the subframe portions to identify a mismatch in polarity.

REFERENCES:
patent: 6611756 (2003-08-01), Chen et al.
patent: 6686853 (2004-02-01), Shen et al.
patent: 6775802 (2004-08-01), Gaal
patent: 6816710 (2004-11-01), Krasner
patent: 2005/0130590 (2005-06-01), Pande et al.

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