Paper Info
Title
Expanding the Positioning Area for Acoustic Localization Using COTS Mobile Devices
Abstract
In this paper, we propose a novel acoustic localization system using commercial off-the-shelf (COTS) mobile devices. Acoustic-based systems have advantages in terms of accuracy and cost. However, the measurable positioning area is limited because of the signal attenuation and the poor performance of microphones embedded in COTS mobile devices. Our system leverages a transmission scheme that combines time-division multiple-access (TDMA) and frequency-division multiple-access (FDMA) techniques to address the limitation. In the proposed approach, each speaker transmits different band chirps in a predefined sequence to mitigate multiple-access interference. A COTS device receives modulated signals via a built-in microphone. We exploit the received signals and estimate the position by calculating time difference of arrival (TDoA). We were able to reduce the error to a 90th-percentile error of 46.26 cm at a measurement point that could not be estimated by FDMA-based positioning. The experiment results show that our system is more accurate and has a larger area of positioning capability compared with FDMA-based positioning.
Year
DOI
Venue
2021
10.1007/978-3-030-94822-1_23
MOBILE AND UBIQUITOUS SYSTEMS: COMPUTING, NETWORKING AND SERVICES
Keywords
DocType
Volume
Chirp, Acoustic indoor localization, TDoA, Smartphone, FDMA and TDMA, Sensing
Conference
419
ISSN
Citations 
PageRank 
1867-8211
0
0.34
References 
Authors
0
6
Name
Order
Citations
PageRank
Takumi Suzaki100.34
Masanari Nakamura202.03
Hiroaki Murakami301.69
Hiroki Watanabe42613.47
Hiromichi Hashizume520025.02
Masanori Sugimoto677595.39