Method for obtaining GPS signal for user terminal

Details Method for obtaining GPS signal for user terminal Method for obtaining GPS signal for user terminal

2005-07-26

2005-07-26

Phan, Dao (Department: 3662)

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

Directive

Including a satellite

Reexamination Certificate

active

06922168

ABSTRACT:
Disclosed is a method for obtaining a GPS signal by a user terminal operating in a time division duplex method, the user terminal receiving the GPS signal and a base station signal, the method includes setting a maximum window reception interval for attempting a GPS signal acquisition; setting within a frame an interval for attempting the GPS signal acquisition and attempting the GPS signal acquisition; exponentially increasing the time period for attempting the GPS signal acquisition and reattempting a GPS signal acquisition, when the GPS signal is not obtained in the set interval for the GPS signal acquisition; and ending the GPS signal acquisition attempts when the interval for the GPS signal acquisition is greater than or equal to the maximum window reception interval.

REFERENCES:
patent: 6473030 (2002-10-01), McBurney et al.
patent: 6633255 (2003-10-01), Krasner
patent: 6724807 (2004-04-01), Krasner et al.

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