Research on Improved RAIM Algorithm Based on Parity Vector Method

Abstract

It's a realistic difficult problem about how to improve the positioning accuracy and the reliability of RAIM algorithms, on the situation that there are not enough available satellites. This dissertation puts forward RAIM algorithms with the elevation information in the areas as marine navigation. Through this method, the information redundancy can be increased. With only 3 satellites, we can realize positioning calculating. With 5 satellites, we can identify one-faulty satellite. With 6 satellites, we can identify simultaneous two-faulty satellites. According to the simulation analysis, this method can effectively improve the availability of fault detection of RAIM algorithms for one-faulty satellite and two-faulty satellites. In practice, it has profound guiding significance for the improvement of the positioning accuracy and the reliability of the receiver.

Multiple Cycle Slip Detection Algorithm for a Single Frequency Receiver

“…The receiver autonomous integrity monitoring (RAIM) methodology used in aviation is an example of a consistency check tool that uses duplicated measurements. Overlapping observations are used to verify statistical consistency; however, detecting CSs in multiple channels is difficult [ 12 , 26 , 27 , 28 ]. The RANCO (Range Consensus) technique solves this difficulty by calculating all possible combinations to produce a normal channel, making real-time processing on the receiver challenging [ 29 , 30 , 31 ].…”

Improved Method for Single and Multiple GNSS Faults Exclusion based on Consensus Voting

“…Ni et al (2007) and Knight et al (2009) proposed an improved scheme assuming two satellite faults and Knight et al (2010) further extended this reliability theory so that it can be applied to detect multiple faults. Cao et al (2013) introduced an improved RAIM algorithm based on a parity vector method, which can effectively improve the availability of fault detection in the case of one or two faults. Yang et al (2013) extended the theory of outlier separability to the general case, where there are multiple alternative hypotheses.…”