Abstract
GPS is developed since 70 s of this century in the United States, after
20 years, at a cost of $20 billion, completed in 1994, has in carring
all-round real-time three-dimensional navigation and positioning
capability of a new generation of satellite navigation and positioning
technology including many advantages, one of the most attractive place
is its global, totipotency, 24 hours a day, not only make it for the user
to provide location information anytime and anywhere, and makes it can
be widely used in many fields such as military and civilian, but because
the GPS contains a variety of error sources, which makes its positioning
accuracy is influenced by a certain.
Based on global positioning system is introduced in thispaper, first
of all, a simple introduction to GPS, second is using GPS pseudorange
measurement and known satellite coordinates through the absolute
position under the premise of solving, in order to improve and improve
the accuracy of localization algorithm, but also to the application of
GPS technology is more extensive, and Kalman filter algorithm is put
forward.
To sum up, in this paper, the research work of navigation and
positioning system of traditional filtering method improvement has a
certain reference, and the Kalman filtering algorithm in improving the
dynamic performance and improve the positioning precision GPS navigation
application has a certain practical value.
Keywords：GPS; recursive least squares; kalman filter.
