2017 ASR: The influence of improper stochastic modeling of BeiDou pseudoranges on system reliabilityYang Ling, Li Bofeng, Li Haojun, Chris Rizos, Shen YunzhongStochastic models are important in Global Navigation Satellite System (GNSS) estimation problems, not only for parameter estimation, or precision assessment, but also for deriving system reliability and integrity measures. China...
2017 J Geod: Improving BeiDou precise orbit determination using observations of onboard MEO satellite receiversGe Haibo, Li Bofeng, Ge Maorong, Shen YunzhongIn recent years, the precise orbit determination (POD) of the regional Chinese BeiDou Navigation Satellite System (BDS) has been a hot spot because of its special constellation consisting of five geostationary earth orbit (GEO) sa...
2017 JSE: Extension of internal reliability analysis regarding separability analysisLi Bofeng, Li Zheng, Zhang Zhiteng, Tan Yu'anMinimal detectable bias (MDB) describes a system's general ability to detect the existence of a single outlier. However, successful identification probability is closely related to the correlations between w-statistics. When the correlation is high, the vali...
2017 J Geod: Extra-wide-lane RTK of triple-frequency GNSS signalsLi Bofeng, Li Zheng, Zhang Zhiteng, Tan Yu'anTriple-frequency signals have thus far been available for all satellites of BeiDou and Galileo systems and for some GPS satellites. The main benefit of triple-frequency signals is their formation of extra-wide-lane (EWL) combinations whose ambiguities can be instantaneously fi...
2017 GPS Solut: Impacts of BeiDou stochastic model on reliability: overall test, w-test and minimal detectable biasLi Bofeng, Zhang Lei, Verhagen SandraExtensive studies have concluded that the GNSS observations are heteroscedastic and physically correlated. Typically, the observation precisions are elevation dependent and between-frequency cross-correlations and time correlations exi...
2017 Geod Geodyn: Comparison and analysis of unmodelled errors in GPS and BeiDou signalsZhang Zhetao, Li Bofeng, Shen Yunzhong, Yang LingExtensive studies on signal noise analysis of Global Navigation Satellite Systems (GNSS) receivers are mainly based on zero and/or short baselines where a pair of receivers is required. This paper develops a new signal noise assessment method for a...
2017 Acta Geod Geophys: A noise analysis method for GNSS signals of a standalone receiverZhang Zhetao, Li Bofeng, Shen Yunzhong, Yang LingExtensive studies on signal noise analysis of Global Navigation Satellite Systems (GNSS) receivers are mainly based on zero and/or short baselines where a pair of receivers is required. This paper develops a new signal noise assessment method for a ...
2017 GPS Solut: Impact of GPS differential code bias in dual- and triple-frequency positioning and satellite clock estimationLi Haojun, Li Bofeng, Lou Lizhi, Yang Ling, WanThe features and differences of various GPS differential code bias (DCB)s are discussed. The application of these biases in dual- and triple-frequency satellite clock estimation is introduced based on this discussio...
2017 Stu G: Multiple linear regression with correlated explanatory variables and responsesFang Xing, Li Bofeng, Wang Miaomiao, Alkhatib Hamza, Zeng Wenxian, Yao YibinN YAO1We discuss the Bayesian inference based on the Errors-In-Variables (EIV) model. The proposed estimators are developed not only for the unknown parameters but also for the variance factor with or without prior inform...
2017 SR: Multiple linear regression with correlated explanatory variables and responsesLi Bofeng, Wang MiaomiaoDifferent from the traditional linear regression model that captures only the errors of dependent variables (responses), this contribution presents a new multiple linear regression model where, besides the errors of responses, the errors of explanatory variables and their cor...
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