TDOA based assisted GNSS positioning algorithm
ZHANG Guang-hua1,2, REN Jing-qiu2, MENG Wei-xiao1
1.Communication Research Center, Harbin Institute of Technology, Harbin 150001,China;2.School of Electric Information Engineering, Northeast Petroleum University, Daqing 163318， China
Abstract:
In order to improve the location performance of User Equipment (UE) , enhance the availability of satellites navigation systems, an assisted Global Navigation Satellite System (GNSS) positioning algorithm based on Time Difference of Arrival (TDOA) technology is proposed for only three visible satellites in this paper. Using the structure of assisted satellite position system, UE was guaranteed to acquire navigation information of the three visible satellites rapidly, and three satellite observation equation were acquired, then the arrival time difference between UE and two adjacent base stations was used as an auxiliary, and a full-rank equation was constructed to achieve positioning by least squares method. The results showed that the algorithm had good convergence ability and positioning accuracy, and the confidence of this method's positioning error, according to 3GPP request of assisted satellite navigation accuracy error within 50 m, reaches 94.56%, the average positioning accuracy was 16.8 m. The validity of this algorithm was demonstrated.
Key words: AGNSS TDOA AGNSS positioning base station.
DOI：10.11916/j.issn.1005-9113.2012.05.003
Clc Number:P228
Fund:
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TDOA based assisted GNSS positioning algorithm
本站小编 哈尔滨工业大学/2019-10-23
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