A survey on wireless position estimation
A survey on wireless position estimation
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DOI：
10.1007/s11277-007-9375-z
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发表时间：
2008-02-01
影响因子：
2.2
通讯作者：
Gezici, Sinan
中科院分区：
文献类型：
--
作者：
Gezici, Sinan
在本文中，无线位置估计的各种算法的概述。虽然无线网络中的节点的位置可以直接从在该节点和多个参考节点之间传播的信号来估计，但是更实际的是首先估计一组信号参数，然后使用那些估计的参数来获得最终的位置估计。在这种两步定位算法的第一步中，估计各种信号参数，例如到达时间、到达角度或信号强度。在第二步中，通常采用映射、几何或统计方法。除了各种定位算法，其估计精度的理论限制也提出了克拉美-罗下界。
In this paper, an overview of various algorithms for wireless position estimation is presented. Although the position of a node in a wireless network can be estimated directly from the signals traveling between that node and a number of reference nodes, it is more practical to estimate a set of signal parameters first, and then to obtain the final position estimation using those estimated parameters. In the first step of such a two-step positioning algorithm, various signal parameters such as time of arrival, angle of arrival or signal strength are estimated. In the second step, mapping, geometric or statistical approaches are commonly employed. In addition to various positioning algorithms, theoretical limits on their estimation accuracy are also presented in terms of Cramer-Rao lower bounds.