Modeling of the TOA-based distance measurement error using UWB indoor radio measurements

Author

Alavi, Bardia ; Pahlavan, Kaveh

Author_Institution

Worcester Polytech. Inst., MA, USA

Volume

10

Issue

4

fYear

2006

fDate

4/1/2006 12:00:00 AM

Firstpage

275

Lastpage

277

Abstract

Time of arrival (TOA) estimation used with ultra wideband (UWB) transmission is currently the most popular technique for accurate indoor geolocation. Due to severe indoor multipath conditions, these techniques often suffer from significant inaccuracy in location estimation. In this paper, we introduce a model for the error in estimated distance as measured from the estimated TOA of the direct path (DP) in a typical multipath indoor environment. The TOA estimation error has two components, (1) the errors caused by the multipath dispersion affecting any signal path and (2) the errors caused by undetected direct path (UDP) conditions. The statistical behavior of this error is also a function of the system bandwidth. The empirical data from UWB indoor measurements in an office building are used to design a model for the distance measurement error. This model relates the behavior of the two components of the TOA estimation error to the bandwidth of the system.

Keywords

distance measurement; indoor radio; measurement errors; multipath channels; statistical analysis; time-of-arrival estimation; ultra wideband communication; TOA-based distance measurement error; UWB indoor radio measurements; direct path; empirical data; indoor geolocation; multipath dispersion; office building; statistical behavior; time of arrival estimation; ultra wideband transmission; undetected direct path; Bandwidth; Current measurement; Distance measurement; Indoor radio communication; Position measurement; Time measurement; Time of arrival estimation; Ultra wideband technology; Velocity measurement; Wireless LAN;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2006.1613745

Filename

1613745