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在研究多点定位系统(Multilateration,MLAT)的时差定位原理以及几何精度因子(Geometric Dilution Precision,GDOP)的数学模型的基础上,分析了北京首都机场的MLAT系统定位性能,之后结合几何因素对定位精确度的影响,通过增加基站数目的方式对基站进行重新布站。实验结果表明,通过增加基站数目的方式调整基站的布站方式可以使MLAT系统获得更高的GDOP值和覆盖率。
Based on the study of the time-difference positioning principle of multilateration system (MLAT) and the mathematical model of Geometric Dilution Precision (GDOP), the location performance of Beijing Capital Airport’s MLAT system is analyzed, and then the combination of geometrical factors The impact of accuracy, by increasing the number of base stations to re-distribution of the base station. The experimental results show that MLAT system can obtain higher GDOP value and coverage by adjusting the distribution method of base stations by increasing the number of base stations.