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Research On GPS/BD Integrated Navigation Receiver Information Processing Algorithm

Posted on:2018-05-06Degree:MasterType:Thesis
Country:ChinaCandidate:X D YueFull Text:PDF
GTID:2348330512473272Subject:Electronic and communication engineering
Abstract/Summary:PDF Full Text Request
Global Navigation Satellite System(GNSS)is a space-based radio navigation system,With the maturity and development of modern navigation technology,GNSS has penetrated into all aspects of social production and life.in addition to the high demand of precision,civil aviation user also has high requirements of GNSS integrity.This paper mainly focuses on the information processing algorithms of GPS/BD integrated navigation receiver.In this paper,the principle of GNSS positioning and the error sources in the process are introduced firstly.Secondly,the method of weighted least squares of GNSS positioning is introduced,and the combined positioning of GPS and BDS is realized by means of weighted average.Then,the time series of the two systems are unified,completed the integrated positioning solution of the two constellations.The combined GPS/BDS positioning solution is realized by two different combinations to improve the positioning accuracy.GPS/BDS integrated navigation based on the method of optimal weighted average solution,can meet the requirement of higher integrity requirement of route approach(APV-I / APV-II).Ensuring weighted average solution satisfies the vertical protect level and vertical accuracy for vertical guidance approach phase by finding the optimal weighting factor.At the same time,combined the test statistic based on the localization domain with the weighted least squares residual fault identification,the RAIM algorithm of weighting optimal average solution can effectively identify the double constellation double fault.Based on the GPS/BDS integrated navigation and positioning,the RAIM algorithm based on the weighted least squares is studied for the double constellation receiver.The advantage of the increase of visible satellites in the double constellation makes the algorithm more suitable for the geometric structure of the satellite.The results show that the algorithm can detect faults and identify the faulty satellites when the pseudorange error exceeds 30 m.In this paper,the information processing of GPS/BDS integrated navigation receiver is studied,which has certain reference significance for the research of China Beidou satellite navigation system and GPS integrated navigation.
Keywords/Search Tags:GPS, BDS, Integrated navigation, Weighted average, Information processing
PDF Full Text Request
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