Algorithms for Estimating the Location of Remote Nodes Using Smartphones
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Data
2019
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Editora
IEEE
Resumo
Locating the position of a remote node on a wireless network is becoming more relevant,
as we move forward in the Internet of things and in autonomous vehicles. This paper proposes a new
system to implement the location of remote nodes. A new prototype Android application has been developed
to collect real measurements and to study the performance of several smartphone's sensors and location
algorithms, including an innovative one, based on the second order cone programming (SOCP) relaxation.
The application collects theWiFi access points information and the terminal location. An internal odometry
module developed for the prototype is used when Android's service is unavailable. This paper compares the
performance of existing location estimators given in closed form, an existing SOCP one, and the new SOCP
location estimator proposed, which has reduced complexity. An algorithm to merge measurements from
non-identical terminals is also proposed. Cooperative and terminal stand-alone operations are compared,
showing a higher performance for SOCP-based ones, that are capable of estimating the path loss exponent
and the transmission power. The heterogeneous terminals were also used in the tests. Our results show that
the accurate positioning of static remote entities can be achieved using a single smartphone. On the other
hand, the accurate real-time positioning of the mobile terminal is provided when three or more scattered
terminal nodes cooperate sharing the samples taken synchronously.
Descrição
IEEE Access Vol. 7, Nº 1, pp. 33713 - 33727, December, 2019
Palavras-chave
ODOMETRY, LOCATION ALGORITHMS, COOPERATIVE LOCALIZATION, ANDROID, ENGENHARIA ELETROTÉCNICA, ELECTROTECHNICAL ENGINEERING, SOFTWARE DE APLICAÇÕES, APPLICATION SOFTWARE, ANDROID, ALGORITMOS, ALGORITHMS, ODOMETRIA, SMARTPHONES, SMARTPHONES, ALGORITMOS DE LOCALIZAÇÃO, LOCALIZAÇÃO COOPERATIVA