【摘要】 伪卫星独立组网的几何布局问题是影响伪卫星定位精度的一项关键技术。针对4颗伪卫星独立组网定位中,其定位可用区域和几何精度因子不能很好地满足用户需求的问题,提出了一种新的伪卫星几何布局方案。该方案在研究4颗伪卫星几何布局与几何精度因子关系的基础上,通过增加一颗伪卫星来改善伪卫星的定位可用区域和几何精度因子,提高用户的定位精度。仿真结果表明,提出的由5颗伪卫星独立组网构成的定位系统,不仅可以增加伪卫星的定位可用区域,而且可以减小伪卫星定位系统的几何精度因子,为提高伪卫星的定位精度提供了一条新途径。更多还原

【Abstract】 The geometric configuration scheme of near space pseudolite-only positon system is a key technology affecting the pseudolite positioning accuracy.In order to meet the demand of users on position available area and geometric dilution of precision(GDOP)when using four pseudolite network positioning system,this paper proposes a new geometric configuration scheme with five pseudolite independent networking solution.To improve the position available area and GDOP of pseudolite independent networking system,this paper adds a pseudolite based on the study on the relationship between the geometric con- figuration and GDOP.The simulation results show that the five pseudolite network positioning system not only can increase the coverage of pseudolite positioning system,but also can decrease the GDOP,it provides a new way to improve the precision of the pseudolite independent networking positioning system.更多还原