Base-Station Random Placement Effect on the Accuracy of Ultrawideband Body-Centric Localization Applications
Base-Station Random Placement Effect on the Accuracy of Ultrawideband Body-Centric Localization Applications
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DOI：
10.1109/lawp.2018.2843881
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发表时间：
2018-06
影响因子：
4.2
通讯作者：
R. Bharadwaj;S. Swaisaenyakorn;J. Batchelor;S. Koul;A. Alomainy
中科院分区：
文献类型：
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作者：
R. Bharadwaj;S. Swaisaenyakorn;J. Batchelor;S. Koul;A. Alomainy
这封信介绍了超宽带频率范围内基站随机放置对三维体心定位影响的研究。研究了不同的基站配置（xyz轴、xy轴和z轴方向不同），保持与体心定位实验数据获得的距离估计误差值相同，以便主要关注基站配置的影响。据观察，随着目标节点在 z 轴方向上分布得更多，基站在 z 轴上的随机位置会导致更高的定位误差（3-8 cm）。定位误差根据几何、水平、垂直精度因子（DOP）进行分析，这是衡量基站放置有效性的指标。对于 DOP 值 (5–15)，观察到误差减少了 1–3 cm，对于较高的 DOP (>20) 值，短距离通信误差增加了 3–5 cm。通过改变距离估计误差的平均值和标准差来进行进一步分析，以评估随机基站配置，这对于估计目标位置的准确性也起着重要作用。
This letter presents an investigation on the effect of random placement of base stations on three-dimensional body-centric localization in the ultrawideband frequency range. Different base station configurations are studied (varied in xyz-axis, xy-axis, and z-axis direction), keeping the same range estimation error values as obtained from the body-centric localization experimental data in order to keep the main focus on the influence of the base-station configurations. It is observed that random positions of the base stations in the z-axis lead to higher localization error (3–8 cm) as the target nodes are spread out more in the z-axis direction. The localization error is analyzed in terms of geometric, horizontal, vertical dilution of precision (DOP), which is a measure of effectiveness of the placement of the base stations. For the DOP values (5–15), 1–3 cm error reduction is observed, and for higher DOP (>20) values, the error increases by 3–5 cm for short-range communication. Further analysis is carried out by varying the range estimation error in terms of mean value and standard deviation for evaluating the random base-station configurations, which also plays an important role in the accuracy of estimating the location of the target.