Motorola Corporation

Sergio Bustamante

Tal Mor

Brian Bucknor

Mark A Goldberg

Maqsud M Alam

Russell S Nelson

A device () has a port (), a first SPS receiver (), and a processor () coupled to the first SPS receiver and the port. The processor is programmed to detect () a second SPS receiver () at the port, deactivate () the first SPS receiver, and determine () a location of the device according to signals received by the second SPS receiver from GPS satellites.

Selecting an optimal satellite positioning system receiver

A method () of frequency drift prediction for use by a positioning receiver () can include the steps of determining () a moving average of a frequency error, determining () a moving average of a frequency drift rate in a communication device, determining () a frequency drift rate uncertainty, and providing () the moving average of frequency error and frequency drift rate, and the frequency drift rate uncertainty to the positioning receiver. A point-to-point slope from the running average of the instantaneous frequency error and a running average of the point-to-point slope for a predetermined time period can be determined (&). The frequency drift uncertainty or window is determined using information determined from the moving average of the frequency drift rate. The positioning receiver can be a global positioning receiver.

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Pembroke Pines, FL, United States of America

Sergio Bustamante