论文部分内容阅读
To the new generation composite GNSS signal,a DU-HTL(Dual Update-rate Hybrid Tracking Loop)of SPLL(Scalar Phase Lock Loop)and VFLL(Vector Frequency Lock Loop)based on a DUKF(Dual Update-rate Kalman Filter)is proposed.Analysis and simulation show,in the DU-HTL,the additional VFLL has litter performance improvement in carrier phase tracking accuracy,but the tracking robustness is improved larger with the help of VFLL especially in the signal shielding environment.When the update-rate of VFLL is low as 0.1s,DU-HTL also has better performance of signal reacquisition.