Patent ID: 7671795
Filing Date: 2010-03-02
Classification: G01C,G01S

Abstract:
1. A circuit comprising: a global positioning system (GPS) receiver that receives a GPS signal and that generates GPS position data based on the GPS signal and generates a GPS data quality; a wireless receiver section coupled to convert an inbound RF signal that includes inbound data into an inbound symbol stream wherein the inbound data is generated by a remote device and wherein the inbound data includes a motion parameter that is related to the motion of the circuit; a processing module coupled to convert the inbound symbol stream into inbound data to recover the motion parameter; a comparator that compares the GPS data quality to a quality threshold and that generates a selection signal when the GPS data quality compares unfavorably to the quality threshold; an integrator that generates an estimated position data based on the motion parameter and prior GPS position data; and a selector, coupled to the comparator, the GPS receiver and the integrator, that generates the position information based on the estimated position data in response to the selection signal.