Low power consumption GNSS receiver and method thereof

Details Low power consumption GNSS receiver and method thereof Low power consumption GNSS receiver and method thereof

2007-05-11

2011-11-15

Odom, Curtis (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S134000, C375S142000, C375S145000, C375S149000, C375S343000

Reexamination Certificate

active

08059699

ABSTRACT:
Disclosed is a low power consumption GNSS receiver by adaptively adjusting clock frequency. A correlator performs correlations to signals received from the channels with a correlator clock frequency. A DSP controls the correlator clock frequency according to a correlator load to performing correlations. The DSP calculates and adjusts code phases and Doppler frequencies for the signals in turn with a DSP clock frequency. The DSP controls the DSP clock frequency according to an accumulated throughput of calculation and adjustment or a predetermined threshold number of channels. The DSP controls the RF power according to the correlator load. A microprocessor processes a measurement result of the calculation and the adjustment for obtaining position information with a microprocessor clock frequency. The microprocessor controls the microprocessor clock frequency according to an accumulated progress of processing the measurement result. Accordingly, reducing power consumption for the GNSS receiver can be realized.

REFERENCES:
patent: 5592173 (1997-01-01), Lau et al.
patent: 6662107 (2003-12-01), Gronemeyer
patent: 7375682 (2008-05-01), Tester et al.
patent: 2003/0147457 (2003-08-01), King et al.
patent: 2007/0247356 (2007-10-01), Chen

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