Method and apparatus for decoding GPS satellite data at low...

Details Method and apparatus for decoding GPS satellite data at low... Method and apparatus for decoding GPS satellite data at low...

2007-08-21

2007-08-21

Phu, Phuong (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S324000, C375S326000, C375S327000, C375S376000, C375S341000

Reexamination Certificate

active

10647035

ABSTRACT:
A method of decoding a received phase modulated carrier signal comprising the following steps: (A) computing a total probability of a current data bit being “one” or “zero” at a time epoch by computing a plurality of probabilities of phase transitions at a plurality of time epochs, each probability of a phase transition at one time epoch being a probability of a phase transition between a current phase of the received phase modulated signal and a phase corresponding to a previously computed data bit; and (B) outputting the current data bit as being “one” or “zero” at the time epoch based on the computed in step (A) total probability.

REFERENCES:
patent: 4669095 (1987-05-01), Hall
patent: 5311523 (1994-05-01), Serizawa et al.
patent: 5438591 (1995-08-01), Oie et al.
patent: 6177835 (2001-01-01), Grebowsky et al.
patent: 6546040 (2003-04-01), Eschenbach
patent: 6721366 (2004-04-01), Van Stralen
patent: 6940927 (2005-09-01), Van Stralen
patent: 6944206 (2005-09-01), Dent

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