The Fraunhofer-Gesellschaft (www.fraunhofer.com) currently operates 76 institutes and research institutions throughout Germany and is the world’s leading applied research organization. Around 30 000 employees work with an annual research budget of 2.9 billion euros.
The Fraunhofer IIS in cooperation with the TU Ilmenau have established a testbed to enable the localization of mobile endpoints using the LPWAN standard »mioty®« for application in current research topics such as the Internet of Things (IoT). The localization is based on time difference of arrival measurements (TDoA).
The testbed consists of several base stations distributed throughout the city of Ilmenau, allowing localization of mobile endpoints within this area. However, the geometric arrangement of the base stations influences the achievable accuracy. This phenomenon is called Dilution of Precision (DOP). Within this thesis, the DOP for different base station arrangements must be evaluated to obtain the best localization accuracy within different scenarios. This includes performance analysis with an increased number of base stations and heuristics to select the best-performing pairs of base stations in scenarios with multiple base stations. This selection can be based on different parameters, like the signal-to-noise ratio at different base stations.
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