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Assessment of direct positioning for IR-UWB in IEEE 802.15.4a channels

機(jī)譯:評估IR-UWB在IEEE 802.15.4a信道中的直接定位

摘要

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.
機(jī)譯:本文評估了在直接位置估計(jì)(DPE)方法的實(shí)際信道模型下IR-UWB中的定位問題。已經(jīng)為諸如GNSS之類的發(fā)達(dá)系統(tǒng)提出了DPE方案用于定位和定位,在分析中已證明,最大似然單步估計(jì)器的性能優(yōu)于兩步過程。對寬帶系統(tǒng)的擴(kuò)展以及室內(nèi)UWB信道等不利方案的探索較少。我們導(dǎo)出了DPE算法,并針對基于兩步TOA的IR-UWB系統(tǒng)定位分析了其性能。為IEEE 802.15.4a信道模型提供了數(shù)值結(jié)果,顯示了兩種方法的定位性能并突出了權(quán)衡。

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