Electronics Technology


GPS receiver has dead-reckoning algorithm

19 November 2003 Electronics Technology

u-blox' GPS receiver has an innovative dead-reckoning algorithm to provide accurate navigation regardless of whether satellites are visible or not.

The Sensor-Based GPS Receiver (SBR-LS), containing the company's leading-edge ANTARIS GPS positioning engine, sets a new benchmark for accurate positioning in areas where GPS reception is hindered. The dead-reckoning algorithm uses information from a turn rate sensor (gyroscope) and the vehicle's odometer for accurate navigation without GPS for extended time periods. Once the satellites are visible again, the GPS receiver (with fast re-acquisition time of less than 1 second) resumes to GPS navigation immediately. In areas with poor GPS reception, eg, city canyons, a weighted mix of GPS and sensor information is used for navigation. The SBR-LS carries out automatic calibration and temperature compensation.



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