Positioning in multiband OFDM UWB utilizing received signal strength

Author

Waadt, A.E. ; Wang, S. ; Kocks, C. ; Burnic, A. ; Xu, D. ; Bruck, G.H. ; Jung, P.

Author_Institution

Dept. of Commun. Technol., Univ. of Duisburg-Essen, Duisburg, Germany

fYear

2010

fDate

11-12 March 2010

Firstpage

308

Lastpage

312

Abstract

Ultra-wideband (UWB) enables accurate Localization and Tracking (LT) applications. However, the required and sophisticated time of arrival (ToA) ranging procedure relies on accurate synchronization and time measurements. Today, only few UWB devices support the required ranging feature. Examples are pulse based low data rate (LDR) UWB devices. Conventional multiband OFDM based high data rate (HDR) UWB devices do not support the ToA ranging feature. But the ultra wide frequency bandwidth of UWB enables not only high resolution of space surrounding UWB transceivers and therefore accurate time measurements, its enormous frequency diversity also minimizes fading effects. This allows reliable distance measurements, based on measurements of the received signal strength (RSS). This paper shows, that RSS based localization can be as accurate as ToA based localization. For this purpose, measurement results of the RSS and a derived path-loss model are used to calibrate a Monte Carlo simulator for RSS based ranging and localization. The RSS measurements are done with conventional wireless USB sticks, using HDR UWB. For a small 2 × 2 meters network, the simulation results show mean localization errors between 0.1 and 0.2 meters.

Keywords

Monte Carlo methods; OFDM modulation; diversity reception; radio transceivers; time-of-arrival estimation; ultra wideband communication; Monte Carlo simulator; RSS based localization; ToA based localization; ToA ranging feature; UWB device; UWB transceiver; frequency diversity; high data rate; low data rate; multiband OFDM UWB; positioning; received signal strength; time-of-arrival; tracking; Accuracy; Distance measurement; Fading; Mobile communication; OFDM; Quantization; Wireless communication; ECMA-368; UWB; localization; location and tracking; multiband OFDM; path-loss; positioning;

fLanguage

English

Publisher

ieee

Conference_Titel

Positioning Navigation and Communication (WPNC), 2010 7th Workshop on

Conference_Location

Dresden

Print_ISBN

978-1-4244-7158-4

Type

conf

DOI

10.1109/WPNC.2010.5653193

Filename

5653193