Enhanced RAIM Based on Weighted and Subset Schemes for GNSS Receiver

L. Yang, Y. Zhang, Y. Gao

Abstract:	With the development of GNSS, more and more satellites could be used in the sky. Therefore, the multi-constellation receiver becomes popular. As a key part to ensure the reliability of receiver, Receiver Autonomous Integrity Monitoring (RAIM) has been a hot research topic. The Least-square residual method is a common Faults Detection and Exclusion (FDE) method which is based on the sum of the squares of the range residual errors (SSE). However, due to the mutual influence of observations (i.e., an error of one observation is absorbed by the residuals of all observations) erroneous rejection of a good observation is possible, especially with large or multiple biases, called FDE failure. To take advantages of the large number of satellites by multi-constellation, this paper proposed an enhanced RAIM algorithm based on the weighted and subset schemes to overcome FDE failure. Even under the large or multiple biases, a reliable navigation solution can be concluded.
Published in:	Proceedings of the ION 2013 Pacific PNT Meeting April 23 - 25, 2013 Marriott Waikiki Beach Resort & Spa Honolulu, Hawaii
Pages:	661 - 666
Cite this article:	Yang, L., Zhang, Y., Gao, Y., "Enhanced RAIM Based on Weighted and Subset Schemes for GNSS Receiver," Proceedings of the ION 2013 Pacific PNT Meeting, Honolulu, Hawaii, April 2013, pp. 661-666.
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