无线网络中附加节点的定位增强

A. Weiss, J. Picard
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引用次数: 0

摘要

下一代移动网络经常提供需要站点位置的服务和应用程序。众所周知,在现有无线网络中增加节点可以提高网络节点的定位精度。我们利用最近的Cramer-Rao约束的紧凑表达式来识别其定位得到改进的节点。进一步,我们定义了减少误差的确切条件。特别是在平面网络中,一个额外的节点必须至少有三个连接,而不是全部连接到锚点,从而影响精度。我们还证明了精度的提高受到一个边界的限制,该边界与附加节点的数量无关。最后,我们提供了一些数值例子来说明精度的提高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Localization enhancement by additional nodes in wireless networks
Next generation mobile networks frequently offer services and applications that require the stations position. It is well known that adding nodes to an existing wireless network enhances the localization accuracy of the network nodes. We exploit a recent compact expression of the Cramer-Rao bound to identify the nodes whose localization is improved. Further, we define the exact conditions for error reduction. In particular, in a planar network, an additional node must have at least three connections, not all of them to anchors, to affect the accuracy. We also show that the accuracy improvement is limited by a bound, which is independent of the number of additional nodes. Finally, we provide numerical examples that shed some light on the accuracy improvement.
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