Self-regulated GPS navigation processor
Horng-Wen Lee, T.H. Meng · 2002
We implement a navigation processor for the stand-alone global positioning system (GPS). We develop a behavior observer to monitor user dynamics and to aid a Kalman filter performing continuous position and speed estimates. The behavior observer consists of a fast observer and a signal detector. The fast observer tracks user maneuvers. The signal detector compares outputs of the fast observer and the Kalman filter to determine user dynamics and corrects operations of the Kalman filter. Simulations using fixed-point arithmetic demonstrate that dramatic improvements on tracking ability can be achieved without degradation in steady-state position accuracy.