一种新的多星座接收机冷启动可见星搜索算法

摘要

为改善多星座接受机冷启动耗时过长的问题,在新的冷启动条件下,分析多星座接收机的冷启动过程,提升可见星搜索效率,并且为了能够应对复杂的遮蔽情况,提出一种新的可见星搜索算法.该算法依据已搜索的可见星缩小剩余卫星的范围,并分为4个阶段,采取不同的处理方法与搜索次序.仿真实验得出结论,在理想与遮蔽情况下,新算法均能有效缩短冷启动耗时.%Analyse the cold-start process of the multi-constellation receiver and the key to enhance the efficiency of the visible-star-searching to reduce the cold-start time of the multi-constellation receiver under the new cold-start condition. In addition, a new visible-star-searching algorithm is proposed to solve the complex masking problem. The algorithm narrows the scope of the remaining satellites only according to visible-stars which have been acquired, and is divided into four sections with different processing methods and searching sequences. The simulation experiment is conducted and the conclusion is that the new algorithm is captive to reduce the cold-start time whenever the situation is ideal or with the mask-ing problem.