Multi-frequency sub-1 GHz radio tomographic imaging in a complex indoor environment

Stijn Denis, Rafael Berkvens, Glenn Ergeerts, Maarten Weyn
2017 2017 International Conference on Indoor Positioning and Indoor Navigation (IPIN)  
Unlike most currently available localization systems, tagless localization technologies do not require a target to wear a passive or active hardware device. Radio Tomographic Imaging (RTI) is one such technique, which operates based on the use of a tomographic radio frequency (RF) sensor network. The majority of RTI-systems communicate using a single frequency band: 2.4 GHz. The use of sub-1 GHz frequencies within RTI could potentially provide important benefits regarding energy efficiency,
more » ... racy in complex indoor environments and size of the environments in which a system can be installed. We deployed a combined 433 MHz and 868 MHz RF sensor network in a complex indoor environment and performed localization when a human individual was present in the environment. Two different RTI-algorithms were investigated: a Bayesian-based method we developed earlier and an adaptation of an existing 2.4 GHz technique based on fade level. Both methods turned out to be capable of accurately locating individuals with a median error lower than 1 meter. This proves the feasibility of using a combination of sub-1 GHz frequencies in RTI for indoor localization in complex environments.
doi:10.1109/ipin.2017.8115894 dblp:conf/ipin/DenisBEW17 fatcat:mbl4p45o4ve6bbvtkqrdruwg5a