Method of enhancing signal tracking in global positioning...

Details Method of enhancing signal tracking in global positioning... Method of enhancing signal tracking in global positioning...

2005-10-25

2005-10-25

Liu, Shuwang (Department: 2634)

Pulse or digital communications

Synchronizers

C375S325000, C375S343000, C341S079000, C701S213000

Reexamination Certificate

active

06959057

ABSTRACT:
A method of enhancing signal tracking in a global positioning system receiver utilizing a frequency banked filter in providing code and carrier tracking loops includes acquiring a continuous time global positioning signal and separating the continuous time global positioning signal into in-phase and quadrature signals I and Q. The signals I and Q are sampled over a predetection interval (PDI) to provide discrete time signals, and the discrete time signals are used to generate a component in-phase measurement and a component quadrature measurement for each of multiple PDI segments of one PDI. For each of multiple different frequency bins, composite in-phase and quadrature measurements are generated by combining component in-phase measurements and component quadrature measurements from the PDI. Power is detected in each of the multiple different frequency bins for the PDI using the corresponding composite in-phase measurement and the corresponding composite quadrature measurement generated for the frequency bin.

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Vittorini et al; Optimizing Indoor GPS Performance; Nov 1, 2003, 6pages.

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