Qualcomm Incorporated

Atheros Communications, Inc.

Juha Tapani Rostrom

Abdelmonaem Lakhzouri

This disclosure involves methods and systems for a GNSS receiver to ascertain its environmental context and subsequently adjust the signal processing and search algorithms to provide improved acquisition. A rapid pre-scan is performed to determine the presence of relatively strong signals. If no satellites are found in the initial pre-scan, successively more sensitive searches are conducted until at least one satellite is acquired. The information from these pre-scans is used to predict the environmental context of the receiver and correspondingly tailor the parameters for the remaining search operations.

Systems and methods for signal acquisition using predicted environmental context

A GPS enabled timepiece. A Global Positioning System (GPS) enabled timepiece in accordance with the present invention comprises a timepiece, the timepiece comprising a local oscillator, and a GPS receiver, coupled to the timepiece, the GPS receiver using the local oscillator to predict a time arrival of a GPS message from a GPS satellite, wherein the GPS receiver is powered on based on the predicted time.

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Tampere, Finland

Juha Tapani Rostrom