IEICE TRANSACTIONS on Fundamentals
Time-of-Arrival-Based Indoor Smartphone Localization Using Light-Synchronized Acoustic Waves
Summary :
We describe SyncSync, a time-of-arrival (ToA)-based localization method for smartphones. In general, ToA measurements show better precision than time-difference-of-arrival (TDoA) measurements, although ToA systems require a synchronization mechanism between anchor and mobile nodes. For this synchronization, we employ modulated LED light with an acoustic wave for time-of-flight distance measurements. These are detected by the smartphone's video camera and microphone. The time resolution in consumer video cameras is typically only a few tenths of a second, but by utilizing a CMOS image sensor's rolling shutter effect we obtain synchronization resolutions of a few microseconds, which is sufficient for precise acoustic ToA measurements. We conducted experiments to confirm operation of the system, and obtained ToA localization errors within 10mm. The characteristics of the error distributions for both TDoA and ToA measurements were explained by dilution of precision.
- Publication
- IEICE TRANSACTIONS on Fundamentals Vol.E100-A No.9 pp.2001-2012
- Publication Date
- 2017/09/01
- Publicized
- Online ISSN
- 1745-1337
- DOI
- 10.1587/transfun.E100.A.2001
- Type of Manuscript
- PAPER
- Category
- Measurement Technology
Authors
Takayuki AKIYAMA
the Graduate University for Advanced Studies
Masanori SUGIMOTO
Hokkaido University
Hiromichi HASHIZUME
National Institute of Informatics
Keyword
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Takayuki AKIYAMA, Masanori SUGIMOTO, Hiromichi HASHIZUME, "Time-of-Arrival-Based Indoor Smartphone Localization Using Light-Synchronized Acoustic Waves" in IEICE TRANSACTIONS on Fundamentals,
vol. E100-A, no. 9, pp. 2001-2012, September 2017, doi: 10.1587/transfun.E100.A.2001.
Abstract: We describe SyncSync, a time-of-arrival (ToA)-based localization method for smartphones. In general, ToA measurements show better precision than time-difference-of-arrival (TDoA) measurements, although ToA systems require a synchronization mechanism between anchor and mobile nodes. For this synchronization, we employ modulated LED light with an acoustic wave for time-of-flight distance measurements. These are detected by the smartphone's video camera and microphone. The time resolution in consumer video cameras is typically only a few tenths of a second, but by utilizing a CMOS image sensor's rolling shutter effect we obtain synchronization resolutions of a few microseconds, which is sufficient for precise acoustic ToA measurements. We conducted experiments to confirm operation of the system, and obtained ToA localization errors within 10mm. The characteristics of the error distributions for both TDoA and ToA measurements were explained by dilution of precision.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.E100.A.2001/_p
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@ARTICLE{e100-a_9_2001,
author={Takayuki AKIYAMA, Masanori SUGIMOTO, Hiromichi HASHIZUME, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Time-of-Arrival-Based Indoor Smartphone Localization Using Light-Synchronized Acoustic Waves},
year={2017},
volume={E100-A},
number={9},
pages={2001-2012},
abstract={We describe SyncSync, a time-of-arrival (ToA)-based localization method for smartphones. In general, ToA measurements show better precision than time-difference-of-arrival (TDoA) measurements, although ToA systems require a synchronization mechanism between anchor and mobile nodes. For this synchronization, we employ modulated LED light with an acoustic wave for time-of-flight distance measurements. These are detected by the smartphone's video camera and microphone. The time resolution in consumer video cameras is typically only a few tenths of a second, but by utilizing a CMOS image sensor's rolling shutter effect we obtain synchronization resolutions of a few microseconds, which is sufficient for precise acoustic ToA measurements. We conducted experiments to confirm operation of the system, and obtained ToA localization errors within 10mm. The characteristics of the error distributions for both TDoA and ToA measurements were explained by dilution of precision.},
keywords={},
doi={10.1587/transfun.E100.A.2001},
ISSN={1745-1337},
month={September},}
Copy
TY - JOUR
TI - Time-of-Arrival-Based Indoor Smartphone Localization Using Light-Synchronized Acoustic Waves
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 2001
EP - 2012
AU - Takayuki AKIYAMA
AU - Masanori SUGIMOTO
AU - Hiromichi HASHIZUME
PY - 2017
DO - 10.1587/transfun.E100.A.2001
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E100-A
IS - 9
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - September 2017
AB - We describe SyncSync, a time-of-arrival (ToA)-based localization method for smartphones. In general, ToA measurements show better precision than time-difference-of-arrival (TDoA) measurements, although ToA systems require a synchronization mechanism between anchor and mobile nodes. For this synchronization, we employ modulated LED light with an acoustic wave for time-of-flight distance measurements. These are detected by the smartphone's video camera and microphone. The time resolution in consumer video cameras is typically only a few tenths of a second, but by utilizing a CMOS image sensor's rolling shutter effect we obtain synchronization resolutions of a few microseconds, which is sufficient for precise acoustic ToA measurements. We conducted experiments to confirm operation of the system, and obtained ToA localization errors within 10mm. The characteristics of the error distributions for both TDoA and ToA measurements were explained by dilution of precision.
ER -
English
