Open AccessProximity estimation for location‐based services with round‐trip time
Author(s) -
Zobenko A.,
Scherrer T.,
Kim SooYong
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2014.1615
Subject(s) - estimation , computer science , location based service , travel time , real time computing , transport engineering , telecommunications , engineering , systems engineering
A proximity estimation algorithm is proposed to measure distances between a transceiver and a receiver for location‐based services in indoor environments. To improve the measurement accuracy, proximity is estimated using the propagation delay caused by the round‐trip travel of the signal. Moreover, to reduce power consumption, frequency downconversion with a mixer is adopted to use frequencies below the gigahertz range. Being a low‐power design, the proposed architecture is suitable for mobile devices such as wearable and internet‐of‐things products. In addition, the implementation of this algorithm on Wi‐Fi‐equipped devices does not need development of special schematics, since it is based on the IEEE 802.11 standard, it could be made with usual Wi‐Fi quadrature amplitude modulation (QAM)‐modulators. The accuracy enhancement of the proposed estimation was verified in comparison with the conventional algorithms by means of simulation.