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W pracy przedstawiono wyniki badań terminala 5G do zastosowań IoT. Badano parametry nadawanego sygnału, jego moc, poziomy emisji poza pasmowych, parametry modulacji oraz właściwości odbiornika. Pomiary wykonano przy pomocy testera radiokomunikacyjnego R&S CMX500. Wyniki odniesiono do obowiązujących norm ETSI, 3GPP. We wnioskach przedstawiono wpływ parametrów odbieranego sygnału na właściwości...
An important element of Internet of Things systems (IoT) is wireless data transmission. Narrowband Internet of Things (NB-IoT) and LTE Cat M1 (LTE-M) are the new standards for such transmission intended for LTE cellular networks. Cellular network operators has recently launched such transmission. The article presents the results of measurements of NB-IoT transmission parameters in this network, inside...
The paper contains a description of the wireless solution intended for falling down detection. The detection functions are embedded into UWB positioning system. The paper describes general system architecture and presents falling down detection algorithm. The results of experiments performed during algorithm development phase as well as tests of the system and detection algorithm are also included.
The paper contains a description of a measurement system intended for gathering data typically used for evaluation of elderly persons mobility and behaviour. The measurements are carried out with MEMS sensors assembled in the mobile device worn by the monitored person. Results of measurements are sent over wireless link to recording nodes for analysis. The paper describes system design and presents...
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