Indoor Positioning for Smartphones Using Asynchronous Ultrasound Trilateration

ISPRS International Journal of Geo-Information

Viacheslav Filonenko¹  Charlie Cullen² 

[1] Digital Media Centre, Dublin Institute of Technology, Dublin 2, Ireland;

关键词: mobile indoor positioning;    ultrasound;    LBS;    least squares trilateration;    TDOA;   

DOI  :  10.3390/ijgi2030598

来源: mdpi

【 摘 要 】

Modern smartphones are a great platform for Location Based Services (LBS). While outdoor LBS for smartphones has proven to be very successful, indoor LBS for smartphones has not yet fully developed due to the lack of an accurate positioning technology. In this paper we present an accurate indoor positioning approach for commercial off-the-shelf (COTS) smartphones that uses the innate ability of mobile phones to produce ultrasound, combined with Time-Difference-of-Arrival (TDOA) asynchronous trilateration. We evaluate our indoor positioning approach by describing its strengths and weaknesses, and determine its absolute accuracy. This is accomplished through a range of experiments that involve variables such as position of control point microphones, position of phone within the room, direction speaker is facing and presence of user in the signal path. Test results show that our Lok8 (locate) mobile positioning system can achieve accuracies better than 10 cm in a real-world environment.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.