Sensors, Vol. 18, Pages 1977: A New Method of High-Precision Positioning for an Indoor Pseudolite without Using the Known Point Initialization
Sensors, Vol. 18, Pages 1977: A New Method of High-Precision Positioning for an Indoor Pseudolite without Using the Known Point Initialization
Sensors doi: 10.3390/s18061977
Authors:
Yinzhi Zhao
Peng Zhang
Jiming Guo
Xin Li
Jinling Wang
Fei Yang
Xinzhe Wang
Due to the great influence of multipath effect, noise, clock and error on pseudorange, the carrier phase double difference equation is widely used in high-precision indoor pseudolite positioning. The initial position is determined mostly by the known point initialization (KPI) method, and then the ambiguities can be fixed with the LAMBDA method. In this paper, a new method without using the KPI to achieve high-precision indoor pseudolite positioning is proposed. The initial coordinates can be quickly obtained to meet the accuracy requirement of the indoor LAMBDA method. The detailed processes of the method follows: Aiming at the low-cost single-frequency pseudolite system, the static differential pseudolite system (DPL) method is used to obtain the low-accuracy positioning coordinates of the rover station quickly. Then, the ambiguity function method (AFM) is used to search for the coordinates in the corresponding epoch. The real coordinates obtained by AFM can meet the initial accuracy requirement of the LAMBDA method, so that the double difference carrier phase ambiguities can be correctly fixed. Following the above steps, high-precision indoor pseudolite positioning can be realized. Several experiment...
Source: Sensors - Category: Biotechnology Authors: Yinzhi Zhao Peng Zhang Jiming Guo Xin Li Jinling Wang Fei Yang Xinzhe Wang Tags: Article Source Type: research
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