GPS timing receiver using oversampling

Details GPS timing receiver using oversampling GPS timing receiver using oversampling

1996-01-26

1998-05-05

Blum, Theodore M.

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

Directive

Including a satellite

3644497, H04B 7185, G01S 502

Patent

active

057481440

ABSTRACT:
A GPS timing receiver for providing a GPS-derived time signal. The GPS timing receiver includes a filter for filtering a GPS signal to a certain information bandwidth, a reference clock for generating a reference clock signal having a clock rate at least ten times the information bandwidth, a sampler using the reference clock signal for oversampling the filtered GPS signal, a correlation subsystem including a microprocessor for correlating the sampled GPS signal to the reference clock signal to measure a time difference between the GPS signal and the reference clock signal, and a time clock to issue a GPS-derived time signal based upon the reference clock signal and adjusted by the measured time difference in increments of the period of the reference clock signal. An optional frequency multiplier multiplies the reference clock rate enabling the time clock to adjust the GPS-derived time signal in increments of the period of the frequency multiplied reference clock signal.

REFERENCES:
patent: 5041833 (1991-08-01), Weinberg
patent: 5185610 (1993-02-01), Ward et al.
patent: 5440313 (1995-08-01), Osterdock

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