Wang M.,Beijing Satllite Navigation Center |
Chen J.,Beijing Satllite Navigation Center |
Mao X.,Beijing Satllite Navigation Center |
Ma Z.,Beijing Information Technique Graduate School
Lecture Notes in Electrical Engineering | Year: 2016
Generally, navigation messages of all satellites and frequencies are broadcasted at the same beginning time. That is, receivers will receive the same message parameters from different satellites and frequencies at the same time. To compress the time of receiving navigation message, alternate broadcasting methods among satellites and frequencies are designed in this paper. Taking Beidou constellation as an example, messages relative to broadcasting turn among satellites and frequencies are optimized and designed. It is indicated that alternate broadcasting design among satellites and frequencies will improve the navigation message’s timeliness effectively. And at the same time, system building cost need not be increased. The study is significant in quick prediction of satellites visibility and decreasing the first positioning time when the receiver is starting. © Springer Science+Business Media Singapore 2016.