Integration of Directional Antennas in an RSS Fingerprinting-Based Indoor Localization System

Sensors

Raúl Guzmán-Quirós¹  Alejandro Martínez-Sala²  José Luis Gómez-Tornero²  Joan Garc໚-Haro²  Kourosh Khoshelham² 

[1] Department of Information and Communication Technologies, Universidad Politécnica de Cartagena, Cartagena 30202, Spain

关键词: indoor localization system;    received signal strength;    fingerprinting technique;    artificial neural networks;    directional antennas;   

DOI  :  10.3390/s16010004

来源: mdpi

【 摘 要 】

In this paper, the integration of directional antennas in a room-level received signal strength (RSS) fingerprinting-based indoor localization system (ILS) is studied. The sensor reader (SR), which is in charge of capturing the RSS to infer the tag position, can be attached to an omnidirectional or directional antenna. Unlike commonly-employed omnidirectional antennas, directional antennas can receive a stronger signal from the direction in which they are pointed, resulting in a different RSS distributions in space and, hence, more distinguishable fingerprints. A simulation tool and a system management software have been also developed to control the system and assist the initial antenna deployment, reducing time-consuming costs. A prototype was mounted in a real scenario, with a number of SRs with omnidirectional and directional antennas properly positioned. Different antenna configurations have been studied, evidencing a promising capability of directional antennas to enhance the performance of RSS fingerprinting-based ILS, reducing the number of required SRs and also increasing the localization success.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.