An improved ARAIM algorithm based on feedback structure

In this paper a new algorithm for advanced receiver autonomous integrity monitoring (ARAIM) based on feedback structure was proposed. A significant feature of this algorithm is that it fully reflects the relationship between coefficients and results. The traditional ARAIM algorithm only meets the minimum error under nominal conditions. It is worth noting that the protection levels (PLs) are not the optimal. The FS-ARAIM algorithm proposed in this paper can greatly improve the protection level while ensuring accuracy and without extra burden in calculations.