辅助北斗导航中参考基站服务范围评估研究

为了提高移动定位性能,增强北斗导航系统的应用能力,降低移动网络的投资成本,提出了一种新的辅助卫星移动定位中参考基站服务范围的评估方法,并对辅助北斗导航中参考基站的服务范围进行了评估。首先利用STK建立北斗导航系统模型,模拟出实际的应用场景;然后在该场景下通过改变参考基站与UE的距离,分别计算出二者观测到同一卫星的区间链路数据;最后通过观测到同颗卫星的持续时长分析出参考基站的服务范围。结果表明,参考基站服务范围对基站与UE观测同一颗卫星的可见时长有着较强的影响,当参考基站服务范围超过300km时,就会严重影响到北斗的辅助性能。研究结果为辅助北斗移动定位业务的开展提供先验信息。

An Evaluation Method on the Service Range of Reference Base Station in Assisted Beidou Navigation

In order to improve the performance of mobile positioning, enhance the Beidou navigation system application ability, reduce the investment cost of mobile network, an evaluation method of reference base station service range in assisted Beidou navigation mobile positioning was proposed in this paper. Beidou navigation system model was established by STK firstly, and actual application scenarios were simulated, and then the link data of observed the same satellite by reference base station and UE at the same time was calculated respectively. Finally, the service range of reference base station was analyzed through the time of observation the same satellites. The simulation results showed that the service range of reference base station had a strong influence for the visible time of observed the same satellite by base station and UE. The assisted performance of Beidou would be seriously affected when the service range of reference base station was more than 300km. The results could provide a priori information for assisted Beidou mobile positioning business development.