Title :
An improved NLOS detection scheme for hybrid-TOA/AOA-based localization in indoor environments
Author :
Horiba, Manato ; Okamoto, Eiji ; Shinohara, Toshiko ; Matsumura, Kohei
Author_Institution :
Dept. of Comput. Sci. & Eng., Nagoya Inst. of Technol., Nagoya, Japan
Abstract :
Collecting location information of persons or things in sensor networks enables a variety of services and applications. For such location information, time of arrival (TOA) or angle of arrival (AOA) of radio waves is often used. Moreover, a hybrid use of them, called hybrid-TOA/AOA (HTA), has also been proposed for performance improvement. However, when the direct wave is blocked by obstacles in the non-line-of-sight (NLOS) environment, the estimation accuracy is severely deteriorated. To coordinate this problem, an iterative minimum residual (IMR) scheme has been proposed for TOA-based estimation. In the IMR scheme, the NLOS nodes are sequentially detected and eliminated, and the estimation performance is improved. However, the IMR scheme for HTA measurements has not been considered. Therefore, in this paper, we propose a new NLOS detection scheme based on IMR scheme for HTA localization and evaluate its improved performances by computer simulations.
Keywords :
Global Positioning System; direction-of-arrival estimation; indoor radio; iterative methods; radiowave propagation; signal detection; time-of-arrival estimation; wireless sensor networks; GPS; HTA measurements; IMR scheme; angle of arrival estimation; computer simulations; direct wave; hybrid-TOA-AOA-based localization; improved NLOS detection scheme; indoor environments; iterative minimum residual scheme; iwireless sensor networks; location information collection; nonline-of-sight environment; radio waves; time of arrival estimation; Accuracy; Conferences; Estimation; Measurement uncertainty; Noise; Position measurement; Ultra wideband technology; AOA position estimation; NLOS environment; TOA position estimation; sensor network;
Conference_Titel :
Ultra-Wideband (ICUWB), 2013 IEEE International Conference on
Conference_Location :
Sydney, NSW
DOI :
10.1109/ICUWB.2013.6663819