NDLI: Research on the Incomplete Constellation GPS Positioning Algorithm by a Combined Altitude and Clock Bias Model

Content Provider	IEEE Xplore Digital Library
Author	Ershen Wang Shufang Zhang Zhixian Zhang
Copyright Year	2010
Abstract	GPS positioning is normally required that four GPS satellites are in view at least. However, due to the frequent blockage of GPS signals in worse environmental condition, such as canyons, forests and high buildings and so on, it is difficult to receive the signals of four satellites, that is GPS incomplete constellation. Therefore, the operation of the GPS receiver may be interrupted. Aiming at the poor positioning feature under GPS incomplete constellation environment, the altitude estimating improved algorithm aiding the receiver to positioning is put forward. Moreover, an auxiliary method for GPS receiver positioning using clock bias forecast model is developed. The combined altitude and clock bias model algorithm was introduced into the pseudorange equations, which ensured the service of GPS receiver could be continuous even in incomplete constellation. Even the GPS receiver can only receive the signals of two satellites. The validation and analysis based on the real GPS data show that this proposed method increases the availability of GPS positioning.
Starting Page	219
Ending Page	222
File Size	296570
Page Count	4
File Format	PDF
ISBN	9781424475063
e-ISBN	9781424475070
DOI	10.1109/ICIE.2010.148
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-08-14
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Satellites altitude- aided algorithm clock bias model Global Positioning System (GPS) Receivers incomplete constellation Mathematical model Equations Global Positioning System Clocks
Content Type	Text
Resource Type	Article

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