| Citation: | LIU Jinxin, TENG Jitao, LI Rui, et al. Method for reducing number of ARAIM subsets based on subset inclusion[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(8): 1592-1600. doi: 10.13700/j.bh.1001-5965.2019.0517(in Chinese)
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Advanced Receiver Autonomous Integrity Monitoring (ARAIM) technology can be used for integrity monitoring in multi-constellation combination positioning. The Multi-Hypothesis Separation Solution (MHSS) standard algorithm, recommended by the ARAIM technology subgroup, may produce lots of subsets to bring heavy computational load. Aimed at this problem, in the dual-constellation combined positioning scenario, by analyzing the inclusion relationship between subsets and the change of Position Dilution of Precision (PDOP), a method of reducing the number of subsets by using one subset to replace multiple subsets is proposed. This method can significantly reduce the number of subsets. The simulation results under different parameters show that the efficiency of the optimized algorithm is at least tripled, and the maximum ARAIM availability difference before and after optimization is no more than 3%.
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