Title :
Determination of the Existence of LoS Blockage and Its Application to UWB Localization
Author :
Lee, Joon-Yong ; Jo, Yung-Hoon ; Kang, Shin-Hoo ; Kang, A-Young ; Ha, Dong-Heon ; Yoon, Sung-Jun
Author_Institution :
Sch. of Comput. Sci. & Electr. Eng., Handong Univ., Pohang
Abstract :
The presence of a line-of-sight (LoS) blockage is one of the major causes of error for ultra-wideband (UWB) localization. LoS blockage degrades the accuracy of the time of arrival (ToA) estimation of the direct path signal by making the multipath structure complex. Furthermore, propagation through the obstructing material introduces excess propagation delay, which causes ranging errors. In this paper, a hypothesis test approach to determine the existence of a LoS blockage in UWB propagation is proposed. Once the non-LoS is identified, the maximum likelihood estimation (MLE) is used for ToA-based positioning. This ML localization algorithm is applied to a set of indoor propagation measurements made in an office building
Keywords :
indoor radio; maximum likelihood estimation; radiowave propagation; time-of-arrival estimation; ultra wideband communication; LoS blockage; MLE; ToA-based positioning; UWB localization; hypothesis test approach; indoor propagation measurement; line-of-sight; maximum likelihood estimation; office building; time-of-arrival estimation; AWGN; Additive white noise; Degradation; Delay effects; Laboratories; Maximum likelihood estimation; Multipath channels; Propagation delay; Testing; Ultra wideband technology; Ultra-wideband (UWB); localization; non-LoS identification;
Conference_Titel :
Military Communications Conference, 2006. MILCOM 2006. IEEE
Conference_Location :
Washington, DC
Print_ISBN :
1-4244-0617-X
Electronic_ISBN :
1-4244-0618-8
DOI :
10.1109/MILCOM.2006.302331
