一种多源组合定位系统中信息质量评估方法

An Information Quality Assessment Method for Multi source Integrated Positioning System

关键词:  多源组合定位  信息质量评估  一致性检验  虚警率  漏警率

Key words:  Multi-source integrated positioning  Information quality assessment  Consistency check  False alarm rate  False dismissal rate

摘要:

多源组合定位系统可有效提高定位精度及定位鲁棒性。但更多的信息源提高了引入低质量信号的可能性，从而影响组合系统的定位性能。针对该问题，提出了一种多源组合定位系统中信息质量评估方法。在单系统信息质量评估的基础上，分析了其虚警率与漏警率，发现了二者的影响因素，利用多系统拥有更多冗余信息的特点，通过一致性检验，实现了多源组合导航系统的信息质量评估。仿真实验结果表明，该方法可以同时降低信息质量评估的虚警率与漏警率，且随着组合定位系统数量的增大，虚警率与漏警率呈持续下降趋势，拥有较好的信息质量评估效果。

Abstract:

Multi-source integrated positioning system can provide more accurate and robust positioning. However, it might introduce more lowquality signals as there are more systems. A new information quality assessment method for multi-source integrated positioning system has been proposed for the aforementioned problem. The influence factors of false alarm rate and false dismissal rate have been analyzed based on the information quality assessment method for single positioning system. Because more systems have more redundant information, the proposed information quality assessment method uses all of those information by employing the consistency check. According the simulation and experiment results, both the false alarm rate and false dismissal rate have been reduced by using the proposed method. Moreover, with the increasing of the system amount, the two rates have reduced continuously which means the proposed method has an excellent performance.