1997•Proceedings of the 10th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1997)Requires access
Vehicle Navigation Using GPS Aided By Speed and Heading Information: Simulation Results
Seong Pil Yoon, John B. Lundberg
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Abstract
Because of Selective Availability (SA), the navigation
accuracy of a vehicle using a standalone GPS system
has been degraded. One of the methods to cope with
this problem is to integrate other navigation sensors.
Dead-reckoning sensors provide inexpensive solutions
over expensive inertial sensors such as
accelerometers. However, to get the most out of the
integrated system, proper weights must be found for
the two position estimates, one from the GPS receiver
and the other which is the previous position estimate
mapped to the current epoch using the information
from the dead-reckoning sensors. This paper shows
the effect of the different values of the weights on the
final estimate of the position in a simulated noisy
environment using a simple filtering algorithm
introduced in this paper. Results show that dead-reckoning
information even with high noise increases
the navigation accuracy of the integrated GPS
system.