Sirf Technology, Inc.

Kurt Christian Schmidt

Lionel Jacques Garin

Gengsheng Zhang

Ashutosh Pande

Gregory Turetzky

Nicolas Patrick Vantalon

Kanwar Chadha

Leon Kuo-Liang Peng

An Aided Location Communication System ('ALCS') is described that may include a geolocation server and a wireless communication device having a GPS section where the GPS receiver section is capable of being selectively switched between a standalone mode and at least one other mode for determining a geolocation of the wireless communications device. An Aided Location Communication Device ('ALCD') is also described. The ALCD includes a position-determination section having a GPS receiver and a communication section where the position-determination section is selectively switchable between a GPS-standalone mode and at least one other mode for determining a geolocation of the ALCD.

Aided location communication system

A satellite based positioning method and system including storing satellite sub-almanac data on a mobile station. Embodiments include using the sub-almanac data to take measurements and calculate a coarse position of the mobile station. Embodiments further include a location server calculating a correction to the coarse position, and the location server determining whether any sub-almanacs used to calculate the coarse position require replacement.

Satellite based positioning method and system for coarse location positioning

In a satellite global positioning system, satellite acquisition and location assistance is based upon shared information between a GPS receiver and a remote server. Satellite position is predicted by satellite almanac data.

Method and apparatus for determining global position using almanac information

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Lawndale, CA, United States of America

Kurt Christian Schmidt