无线传感器网络中的位置估计精度

Conference Record of the Thirty-Sixth Asilomar Conference on Signals, Systems and Computers, 2002. Pub Date : 2002-11-03 DOI:10.1109/ACSSC.2002.1197033

Neal Patwari, A. Hero

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引用次数: 51

摘要

无线传感器网络的点对点特性为精确和低配置的传感器位置估计提供了机会。距离测量是在传感器对之间进行的，而不考虑它们的先验坐标知识。本文通过Cramer-Rao界(CRB)来量化使用测量到达时间(TOA)或接收信号强度(RSS)的位置估计器的方差限制。一项广泛的活动测量了44台多点对多点室内网络中的TOA和RSS，用于输入位置的最大似然估计器(MLE)。利用TOA和RSS分别证明了RMS定位误差为1.2 m和2.2 m。

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Location estimation accuracy in wireless sensor networks

The peer-to-peer nature of a wireless sensor network presents the opportunity for accurate and low-configuration sensor location estimation. Range measurements are made between pairs of sensors, regardless of their a priori coordinate knowledge. This paper quantifies via the Cramer-Rao bound (CRB) variance limits on location estimators which use measured time-of-arrival (TOA) or received signal strength (RSS). An extensive campaign measures TOA and RSS in a 44-device multipoint-to-multipoint indoor network for input into maximum-likelihood estimators (MLE) of location. RMS location errors of 1.2 and 2.2 m are demonstrated using TOA and RSS, respectively.

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Conference Record of the Thirty-Sixth Asilomar Conference on Signals, Systems and Computers, 2002.

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