An EMD—Based Fast Algorithm for INS Aided BDS Ambiguity Resolution

摘要: Beidou satellite navigation system (BDS) signal is blocked during dynamic positioning which can lead to poor geometry structure of visible satellites and serious multipath effect. In this contribution, the advantages inertial (INS), autonomy short-term accuracy, are used speed up BDS ambiguity resolution (AR). However, accuracy general INS cannot meet fixed original carrier requirement. broadcast three frequency observations, so virtual observations long wavelength short formed by linear combination, make precision requirement achieve high positioning, respectively. The due relatively large noise difficult reliably fixed. To solve problem, Empirical mode decomposition (EMD) be decompose error into two parts: systematic random error. Systematic correct float solution reduce search space, a reliable purpose, finally solving baseline solution. experimental results show that algorithm more fast than traditional algorithms, suitable for in complex environment.