Assessment of Direct Positioning for IR-UWB in IEEE 802.15.4a channels
Assessment of Direct Positioning for IR-UWB in IEEE 802.15.4a channels
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IEEE 802.15.4a 通道中 IR-UWB 直接定位的评估
DOI：
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发表时间：
2013
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通讯作者：
M. Nájar
中科院分区：
文献类型：
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作者：
M. Navarro;P. Closas;M. Nájar
本文评估的问题，定位在IR-UWB现实信道模型下的直接位置估计（DPE）的方法。DPE方案已被提出用于定位和定位的良好发展的系统，如GNSS，它已被分析证明，最大似然单步估计优于两步程序。扩展到宽带系统和不太有利的情况下，如室内UWB信道的探索较少。我们推导了一种DPE算法，并分析了其在IR-UWB系统中针对基于两步TOA的定位的性能。IEEE 802.15.4a信道模型的数值结果显示定位性能的两种方法，并突出的权衡。
This paper assesses the problem of localization in IR-UWB under realistic channel models for Direct Position Estimation (DPE) approaches. DPE schemes have been proposed for positioning and localization for well developed systems like GNSS, where it has been analytically proved that the Maximum-likelihood single-step estimator outperforms two-step procedures. The extension to wideband systems and less favorable scenarios like indoor UWB channels is less explored. We derive a DPE algorithm and analyze its performance against two-step TOA based localization for an IR-UWB system. Numerical results are provided for IEEE 802.15.4a channel model showing positioning performance of the two approaches and highlighting the tradeoffs.