基于信噪比加权的丹麦法抗差导航模型研究

Research on Danish Robust Navigation Model based on S/N weighted

在接收机自主完备性算法(RAIM)中粗差探测和剔除最为关键。针对原有算法的不足,提出将基于信噪比加权丹麦法用于接收机自主完备性监测中。利用迭代最小二乘估计对故障卫星进行降权处理,以达到隔离的效果。对算法进行数学建模,描述了算法的流程;利用实测数据进行验证表明:该方法计算速度快且精度也有所提高,具有一定的参考价值。

Fault Detection and Fault Exclusion are most critical in Receiver Autonomous Integrity Monitoring（RAIM）.This paper applys a new approach-modified Danish method based on weighted Signal to Noise Ratio to RAIM for improving the original algorithm.In order to achieve the effect of isolation,it uses iterative least-square estimation to deweight the faulty satellite.This paper descrbes the process of the algorithm according to mathematics modeling and then test and verify the algorithm with data.The results show that the speed of calculation and accuracy are improved.It has some reference value.