Title :
Long-duration carrier-smoothed-code algorithm for GPS positioning
Author :
Chen, H.-S. ; Wang, L.S. ; Chang, E.R.
Author_Institution :
Inst. of Appl. Mech., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
To manage the problems arising during long-term positioning by using the GPS (Global Positioning System) signals, the so-called long-duration carrier-smoothed-code (LCSC) algorithm was developed. Based on the classical carrier-smoothed-code (CSC) method, a Kalman filter is used to predict the carrier phase and to compensate the lost carrier phase once cycle slip happens. A fuzzy-control-based tuning algorithm is applied to adjust the weightings between the carrier signal and code signal in the CSC method. A least-square method is used to solve the inevitable problem of satellite changes during long-term navigation. From both static and dynamic experiments, the LCSC indeed provides a more stable method in long-term positioning
Keywords :
Global Positioning System; Kalman filters; codes; fuzzy control; least squares approximations; smoothing methods; telecommunication control; GPS positioning; GPS signals; Global Positioning System; Kalman filter; carrier phase compensation; carrier phase prediction; carrier signal; carrier-smoothed-code method; code signal; cycle slip; dynamic experiments; fuzzy-control-based tuning algorithm; least-square method; long-duration carrier-smoothed-code algorithm; long-term navigation; long-term positioning; satellite changes; static experiments; Algorithm design and analysis; Cities and towns; Clocks; Convergence; Delay effects; Global Positioning System; Measurement errors; Position measurement; Satellite navigation systems; Signal synthesis;
Conference_Titel :
Position Location and Navigation Symposium, IEEE 2000
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-5872-4
DOI :
10.1109/PLANS.2000.838291
