Method for obtaining precise tracking frequency of GPS signal

Details Method for obtaining precise tracking frequency of GPS signal Method for obtaining precise tracking frequency of GPS signal

2011-03-22

2011-03-22

Tarcza, Thomas H (Department: 3662)

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

Directive

Including a satellite

C342S357490

Reexamination Certificate

active

07911377

ABSTRACT:
A method for obtaining a precise tracking frequency of a global positioning system (GPS) signal is described, which includes the following steps. A plurality of data from a satellite is continuously received. Each data has a tracking frequency. A plurality of phase differences of the received data is calculated. A phase difference average of the obtained phase differences is calculated. A frequency difference is calculated by the calculated phase difference average and a constant frequency parameter. A new tracking frequency is calculated by the frequency difference and a tracking frequency of the last data among the plurality of received data. A next data is received by the calculated new tracking frequency. A new tracking frequency is obtained by repeatedly calculating the average phase differences of the plurality of data received from the satellite and a constant frequency parameter, so as to obtain the most precise tracking frequency.

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