基于载波相位的GPS码伪距平滑算法设计

文中给出了全球定位系统接收机可获取观测量的误差估计,基于此讨论了平滑算法的性能。平滑算法的精度与接收机性能,权重因子和平滑递归的次数有关。给出了载波相位平滑伪码伪距的具有最快的噪声对消的递归算法结构,并且对其性能进行了评估。当递归次数大于100,码伪距和载波相位的测量精度分别为5.6m和5mm时,具有最优加权系数的平滑算法可提供优于30cm的伪距测量精度。

Design and Evaluation of GPS Code Pseudorage Smoothing Algorithm Based on Carrier Observables

The goal in designing a GPS code pseudorange smoothing algorithm is to smooth the random noise of the code pseudorange by means of the carrier observables and to improve the positioning accuracy when the requirement for real-time kinematic point determination is satisfied.The performance of smoothing algorithm is dominated by three factors of the receiver performance,the choice of weight factor,and the recursive time.Theoretic discussion of evaluation of the smoothing algorithm is made in this paper.And a smoothing algorithm with optimal weight factor is given here,which has the fastest noise reduction performance.