An analysis of smoothing pseudorange algorithm based on Doppler reconstruction

Carrier phase smoothing pseudorange is a common method to improve the accuracy of pseudorange positioning, the traditional carrier phase smoothing algorithm is affected by various errors, prone to cyclical jumps and other problems, while Doppler observations are affected by receiver sampling, in the case of low sampling rate can not well improve the accuracy of pseudorange positioning, weaken pseudorange noise. In this paper, an algorithm based on Doppler reconstruction of carrier phase smoothing pseudorange is proposed, and the dual-frequency ionospheric non-ionospheric combination method is combined with B2b signal, which is compared and analyzed with the traditional hatch filtering algorithm. The calculation results show that the algorithm proposed in this paper can effectively weaken the observation noise and improve the positioning accuracy, among which the horizontal direction is increased by 18% compared with the traditional HATCH filtering, and the three-dimensional positioning accuracy is improved by 20%.