BDS星座的完好性保护级改进算法

An improved algorithm of integrity protection level for BDS constellation

针对因北斗区域星座分布不均和单星故障率较高所导致的完好性监测的可用性误判问题,提出用于北斗区域星座的完好性保护级改进算法:通过调整危险误导信息概率在各假设分组中的分配,使保护门限对定位误差形成更紧致的包络。试验表明,该方法能有效地减少完好性监测的可用性误判,适应于北斗区域星座存在多故障假设分组的特点。

This paper gave a method to reduce the misjudgment caused by the unevenness of the BDS regional constellation and the high failure rate of BDS satellites.The protection level would envelop more effectively the positioning error by adjusting the distribution of HMI in each hypothesis.Experimental results showed that the proposed method could effectively reduce the misjudgment by adapting well to the characteristics of multi-fault hypothesis of BDS regional constellation.